Oral cavity shooting equipment control method and device and oral cavity shooting equipment

Abstract

The embodiment of the invention discloses a control method and device of oral cavity shooting equipment and the oral cavity shooting equipment. The method is applied to the oral cavity shooting equipment, the oral cavity shooting equipment comprises a shooting module and a light emitting module, and the method comprises the steps that shooting information of the oral cavity shooting equipment is acquired, and the shooting information is directly or indirectly related to the distance between the shooting module and a shooting object; target parameters are determined according to the shooting information, the target parameters comprise target light-emitting parameters corresponding to the light-emitting module and / or target shooting parameters corresponding to the shooting module, and the target light-emitting parameters are used for controlling the light-emitting module to light the shooting object. The target shooting parameter is used for controlling the shooting module to collect an image of the shooting object. According to the control method and device of the oral cavity shooting equipment and the oral cavity shooting equipment, the image quality of the oral cavity image shot by the oral cavity shooting equipment can be improved, and the performance of the oral cavity shooting equipment is improved.

Description

Technical Field

[0001] This application relates to the technical field of oral care, and specifically relates to a control method and device for an oral photographing device, and an oral photographing device. Background Art

[0002] With the continuous improvement of people's attention to oral health, taking oral images and analyzing the oral images to evaluate the oral health condition has become one of the important ways to analyze oral health at present. Currently, when using an oral photographing device to take oral images, the image quality of the taken oral images often does not meet the requirements, seriously affecting the accuracy and reliability of subsequent oral health analysis. Therefore, how to improve the image quality of oral images taken by an oral photographing device has become an urgent technical problem to be solved. Summary of the Invention

[0003] An embodiment of this application discloses a control method for an oral photographing device, which is applied to an oral photographing device. The oral photographing device includes a camera module and a lighting module. The method includes:

[0004] Obtain the shooting information of the oral photographing device, where the shooting information is directly or indirectly related to the distance between the camera module and the shooting object;

[0005] Determine target parameters according to the shooting information. The target parameters include target lighting parameters corresponding to the lighting module and / or target shooting parameters corresponding to the camera module. The target lighting parameters are used to control the lighting module to illuminate the shooting object, and the target shooting parameters are used to control the camera module to capture an image of the shooting object.

[0006] An embodiment of this application discloses an oral photographing device, including a camera module, a lighting module, and a controller. The controller is respectively connected to the camera module and the lighting module;

[0007] The controller is configured to:

[0008] Obtain the shooting information of the oral photographing device, where the shooting information is directly or indirectly related to the distance between the camera module and the shooting object;

[0009] Determine target parameters according to the shooting information. The target parameters include target lighting parameters corresponding to the lighting module and / or target shooting parameters corresponding to the camera module. The target lighting parameters are used to control the lighting module to illuminate the shooting object, and the target shooting parameters are used to control the camera module to capture an image of the shooting object.

[0010] An embodiment of the present application discloses a control device for an oral cavity photographing device, which is applied to an oral cavity photographing device. The oral cavity photographing device includes a photographing module and a lighting module. The device includes:

[0011] An acquisition module, configured to acquire photographing information of the oral cavity photographing device, where the photographing information is directly or indirectly related to the distance between the photographing module and the photographed object;

[0012] A parameter determination module, configured to determine target parameters according to the photographing information. The target parameters include target lighting parameters corresponding to the lighting module and / or target photographing parameters corresponding to the photographing module. The target lighting parameters are used to control the lighting module to illuminate the photographed object, and the target photographing parameters are used to control the photographing module to acquire an image of the photographed object.

[0013] An embodiment of the present application discloses an oral cavity photographing device, including a memory and a processor. A computer program is stored in the memory. When the computer program is executed by the processor, the processor implements the method described in any one of the above embodiments.

[0014] An embodiment of the present application discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor implements the method described in any one of the above embodiments.

[0015] An embodiment of the present application discloses a computer program product, including a computer program. When the computer program is executed by a processor, the processor implements the method described in any one of the above embodiments.

[0016] In an embodiment of the present application, photographing information of an oral cavity photographing device is acquired, and target lighting parameters corresponding to a lighting module and / or target photographing parameters corresponding to a photographing module are determined according to the photographing information. The oral cavity photographing device can dynamically adjust the lighting parameters of the lighting module and / or the photographing parameters of the photographing module according to the photographing information. Since the photographing information is directly or indirectly related to the distance between the photographing module and the photographed object, the target lighting parameters when the lighting module illuminates the photographed object and / or the target photographing parameters when the photographing module performs image photographing can be accurately adjusted according to the photographing information. It is possible to avoid problems such as overexposure or underexposure of the image of the photographed object collected by the photographing module due to different distances between the photographing module and the photographed object, improve the image quality of the oral cavity image captured by the oral cavity photographing device, further improve the effect of oral cavity detection using the oral cavity image, and improve the performance of the oral cavity photographing device. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is an application scenario diagram of the control method of the oral cavity photographing device in an embodiment;

[0019] Figure 2A It is a schematic structural diagram of the oral cavity photographing device in an embodiment;

[0020] Figure 2B It is a schematic structural diagram of the disassembly of the mouth opener and the main body part of the oral cavity photographing device in an embodiment;

[0021] Figure 3A It is a schematic structural diagram of the oral cavity photographing device in another embodiment;

[0022] Figure 3B It is a schematic diagram of using the oral cavity photographing device to take an oral cavity image in an embodiment;

[0023] Figure 4A It is a schematic structural diagram of the photographing part in an embodiment;

[0024] Figure 4B It is a structural block diagram of the oral cavity photographing device in an embodiment;

[0025] Figure 5 It is a flowchart of the control method of the oral cavity photographing device in an embodiment;

[0026] Figure 6A It is a schematic diagram of the oral cavity area in an embodiment;

[0027] Figure 6B It is a schematic diagram of the occlusal surface image taken by the camera module in an embodiment;

[0028] Figure 7A It is a schematic diagram of the relationship between the target parameter and the distance in an embodiment;

[0029] Figure 7B It is a schematic diagram of the relationship between the target parameter and the distance in another embodiment;

[0030] Figure 7C It is a schematic diagram of the relationship between the target parameter and the distance in another embodiment;

[0031] Figure 8A It is a schematic diagram of the relationship between the target parameter and the area of the region in an embodiment;

[0032] Figure 8B Schematic diagram of the relationship between the target parameter and the area of the region in another embodiment;

[0033] Figure 8C Schematic diagram of the relationship between the target parameter and the area of the region in another embodiment;

[0034] Figure 9 Schematic diagram of the positioning part of the oral photographing device in contact with the outer side of the tooth in one embodiment;

[0035] Figure 10 Flowchart of the control method of the oral photographing device in another embodiment;

[0036] Figure 11 Flowchart of determining the target parameter in one embodiment;

[0037] Figure 12 Flowchart of determining the target parameter in another embodiment;

[0038] Figure 13 Flowchart of the oral photographing device taking images in different shooting modes in one embodiment;

[0039] Figure 14 Block diagram of the control device of the oral photographing device in one embodiment;

[0040] Figure 15 Structural block diagram of the oral photographing device in another embodiment. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0042] It should be noted that the terms "include" and "have" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0043] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of this application, the first shooting mode may be referred to as the second shooting mode, and similarly, the second shooting mode may be referred to as the first shooting mode. Both the first shooting mode and the second shooting mode are shooting modes, but they are not the same shooting mode. The term "plurality" used in this application refers to two or more. The term "and / or" used in this application refers to one of the scenarios or any combination of multiple scenarios.

[0044] Figure 1 It is an application scenario diagram of the control method of the oral cavity photographing device in an embodiment. As Figure 1 shown, the control method of the oral cavity photographing device provided by the embodiment of this application can be applied to the oral cavity photographing device 110.

[0045] The oral cavity photographing device 110 may include, but is not limited to, devices such as oral cameras, oral endoscopes, and oral scanners. Optionally, the oral cavity photographing device 110 may be a portable device, having the advantages of small volume, light weight, easy operation, and easy maintenance. With the portable oral cavity photographing device 110, it is possible to meet the needs of oral image shooting and oral analysis in the daily needs of users, and solve the problem of inconvenience caused by the fact that users must go to places such as hospitals to use professional oral detection instruments to perform oral image shooting and oral analysis.

[0046] In some embodiments, the oral cavity photographing device 110 may include a main body 112 and a support arm 114. The main body 112 may be the housing of a controller, a battery, or other electronic components that control the operation of the oral cavity photographing device 100. Exemplarily, the main body 112 may be a handle for the user to hold. The support arm 114 may be connected to the main body 112. Further, the support arm 114 is also connected to the photographing unit, and the photographing unit may include a light emitting module 116 and an imaging module 118. The light emitting module 116 is used to illuminate the object to be photographed (such as teeth in the oral cavity), and the imaging module 118 may be used to collect images of the object to be photographed.

[0047] By holding the main body 112, the user can insert the photographing unit into the user's oral cavity. The light emitting module 116 illuminates the object to be photographed (such as teeth, etc.) in the user's oral cavity, and then the imaging module 118 collects images of the object to be photographed. Further, by adjusting the position and / or angle of the photographing unit in the user's oral cavity, the imaging module 118 can collect images of different oral regions.

[0048] Exemplarily, Figure 2A It is a schematic structural diagram of the oral cavity photographing device in an embodiment. AsFigure 2A As shown, the oral photographing device 200 may include a main body 210, a support arm 220 connected to the main body, and a photographing unit 230 connected to the support arm 220. The oral photographing device 200 may further include an oral retractor 240, and the oral retractor 240 is detachably connected to the support arm 220 and the main body 210.

[0049] Further, the oral retractor 240 includes at least one opening, and the opening of the oral retractor 240 corresponds to the imaging module in the photographing unit 230, so that the imaging module can capture an image through the opening of the oral retractor 240. When the oral retractor 240 is connected to the support arm 220 and the main body 210, the user can hold the oral retractor 240 in the mouth, or abut one end of the oral retractor 240 against the teeth. The oral retractor 240 can hold the lips open and maintain the position of the user's oral cavity, so that when the imaging module captures an image of the tooth surface, the oral photographing device 200 is stable in position and not blocked by the lips, and more complete images of the teeth and gums can be captured.

[0050] As Figure 2B shown, when the oral retractor 240 is detached from the support arm 220 and the main body 210, that is, when the user detaches the oral retractor 240 from the oral photographing device 200, the user can insert the photographing unit 230 connected to the support arm 220 deep into the user's oral cavity, so that the imaging module in the photographing unit 230 captures an image of the inside of the user's oral cavity.

[0051] Exemplarily, Figure 3A is a schematic structural diagram of an oral photographing device in another embodiment. As Figure 3A shown, the oral photographing device 300 includes a main body 310, a support arm 320 connected to the main body, and a photographing unit 330 connected to the support arm 320.

[0052] In some embodiments, the support arm 320 may include a positioning portion 322, and the positioning portion 322 can be used to stabilize the support arm 320 of the oral photographing device 300, so as to facilitate the imaging module to capture an image of the user's oral cavity. For example, as Figure 3B shown, when the oral photographing device 300 is placed on the dental arch (for example, the lower dental arch), and the shooting angle of the imaging module of the photographing unit 330 faces another dental arch (for example, the upper dental arch), the support arm 320 can be stabilized by the positioning portion 322. With this structure, the distance between the imaging module of the photographing unit 330 and the object to be photographed (for example, the upper dental arch) can be increased, so that the imaging module can capture more oral regions in a single image, such as enabling the imaging module to capture a panoramic view of the entire upper dental arch. Compared with traditional oral photographing devices, the oral photographing device 300 provided in the embodiments of the present application can also reduce the angle at which the user opens the oral cavity when photographing oral images.

[0053] Exemplarily, Figure 4A FIG. Figure 4A is a schematic structural diagram of the photographing unit in one embodiment. As Figure 4A shown, the photographing unit may include a light emitting module 116 and an imaging module 118. The light emitting module 116 may include a plurality of lamps. Optionally, the plurality of lamps of the light emitting module 116 may be arranged around the imaging module 118.

[0054] The light emitting module 116 may emit visible light. For example, the light emitting module 116 may emit at least one of white light, purple light, blue light, ultraviolet light, red light, etc. Optionally, the light emitting module 116 may also emit invisible light. For example, the light emitting module 116 may emit infrared light, ultraviolet light, laser light, etc.

[0055] In some embodiments, the lamps in the light emitting module 116 may generate light in at least one of the following bands: 100 nm (nanometers) to 400 nm, 350 nm to 500 nm, 380 nm to 750 nm, 700 nm to 2500 nm, 2500 nm to 1 mm (millimeters). The light emitting module 116 can be used not only for illumination, but also for providing specific light wavelengths that are helpful for scanning or inspecting corresponding objects. For example, the purple light provided by the light emitting module 116 can be used to stimulate the fluorescence effect of dental plaque, or the infrared light provided by the light emitting module 116 can be used to detect the situation of proximal caries and internal demineralization of teeth, etc.

[0056] In some embodiments, the light emitting module 116 may emit light in a first band, and the light in the first band can be used for illumination. For example, the light emitting module 116 emits white light for illumination.

[0057] The light emitting module 116 may also emit light in a second band, and the light in the second band can be used to enhance the presentation effect of harmful substances or diseased areas in the oral cavity in the image. For example, the light emitting module 116 emits purple light or blue light to stimulate the fluorescence effect of dental plaque, and / or the light emitting module 116 may emit near-infrared light to detect the situation of proximal caries and internal demineralization of teeth, and / or the light emitting module 116 may emit far-infrared light to detect the local temperature increase caused by gingival inflammation, so that the imaging module captures a thermal imaging image, and / or the light emitting module 116 may emit mid-infrared light to detect the tooth mineral content and evaluate the demineralization or remineralization of teeth, and / or the light emitting module 116 may emit ultraviolet light to stimulate the fluorescence difference of dental plaque or caries areas.

[0058] Exemplarily, the first wavelength band may include 315 - 400 nm, and the second wavelength band may include at least one of 350 - 500 nm, 700 - 2500 nm, 2500 nm - 1 mm, 100 - 400 nm, etc. By emitting light of different wavelength bands, the light-emitting module 116 can not only meet the lighting requirements of the imaging module 118 and improve the image quality of the oral cavity images captured by the oral cavity photographing device, but also meet the requirement of enhancing the presentation effect of harmful substances or diseased areas in the oral cavity in the images, enriching the oral cavity detection functions of the oral cavity photographing device and improving the performance of the oral cavity photographing device.

[0059] Optionally, the light-emitting module 116 may include at least a first type of lamp and a second type of lamp, where the first type of lamp is used to emit light of the first wavelength band, and the second type of lamp is used to emit light of the second wavelength band. Further, the second type of lamp may include one or more subtypes. For different wavelength band ranges of the second wavelength band, different subtypes of lamps may be set to emit light of corresponding wavelength band ranges. For example, a lamp for emitting light of 350 - 500 nm may be set, and a lamp for emitting light of 700 - 2500 nm, a lamp for emitting light of 100 - 400 nm, etc. may also be set, which is not limited herein.

[0060] It should be noted that it is also possible that one subtype of lamp can emit light of multiple different wavelength band ranges of the second wavelength band. For example, an infrared lamp can be used to emit near-infrared light of 700 - 2500 nm, and can also be used to emit mid-infrared light or far-infrared light of 2500 nm - 1 mm.

[0061] In some embodiments, the imaging module 118 may include a wide-angle camera, and the FOV (Field of View) corresponding to the wide-angle camera may be greater than or equal to 140°. For example, the FOV corresponding to the wide-angle camera may be 140°, 145°, 150°, 157°, 160°, 163°, 170°, 180°, etc., but is not limited thereto. When the oral cavity photographing device is inserted deep into the user's oral cavity, the imaging module 118 of the oral cavity photographing device can capture a panoramic image of the dental arch in a single image. Figure 3B For example, when the oral cavity photographing device 300 is placed on a dental arch (e.g., the lower dental arch) and the shooting angle of the imaging module 118 is directed towards another dental arch (e.g., the upper dental arch), the wide-angle camera can more easily capture a panoramic image of the entire dental arch or the occlusal surface at a normal mouth-opening angle.

[0062] Further, when the imaging module 118 is used to capture the occlusal surface, in the oral cavity image captured by the wide-angle camera, the proportion of the area of the occlusal surface is greater than the target proportion threshold; this proportion of the area refers to the proportion of the area of the occlusal surface included in the oral cavity image to the complete occlusal surface of the user's oral cavity. The fact that the proportion of the area of the occlusal surface captured by the wide-angle camera is greater than the target proportion threshold indicates that the occlusal surface captured by the wide-angle camera is relatively complete. The user can obtain an image of a relatively complete occlusal surface through a single shooting operation without the need to adjust the shooting position and / or shooting angle multiple times, which improves the usability of the oral cavity shooting device. Moreover, the occlusal surface captured by the wide-angle camera is relatively complete, reducing the number of shots required. At the same time, the panoramic image of the occlusal surface is also beneficial for subsequent oral cavity condition analysis.

[0063] Optionally, the imaging module 118 may include a fixed-focus camera, which reduces the calibration time, enables faster shooting response, and shortens the shooting waiting time. In addition, when the camera is a fixed-focus camera and the FOV is determined, the shooting information corresponding to a specific object can also be relatively determined, making it easier to preset shooting parameters, and the entire product hardware architecture and control logic are more simplified and practical.

[0064] Figure 4B is a structural block diagram of an oral cavity shooting device in an embodiment. As Figure 4B shown, the oral cavity shooting device may further include a controller 120, and the controller 120 may be respectively connected to the lighting module 116 and the imaging module 118. The controller 120 can control the operation of the lighting module 116 and the imaging module 118.

[0065] In the related art, when a user uses an oral cavity shooting device to capture a shooting object (such as teeth) in the user's oral cavity, affected by various factors, such as the use position and use posture of the oral cavity shooting device and the shape of the teeth, the distance between the imaging module 118 on the oral cavity shooting device and the shooting object is different. As a result, when the lighting module 116 is used to illuminate the shooting object, the amount of light entering the imaging module 118 is different, resulting in problems such as overexposure or underexposure in the image captured by the imaging module 118, which affects the image quality of the image captured by the imaging module 118.

[0066] In an embodiment of the present application, the controller 120 can obtain the shooting information of the oral cavity shooting device, and the shooting information is directly or indirectly related to the distance between the imaging module 118 and the shooting object. The controller 120 can determine the target parameters according to the shooting information, and the target parameters include the target light-emitting parameters corresponding to the light-emitting module 116 and / or the target shooting parameters corresponding to the imaging module 118. The target light-emitting parameters can be used to control the light-emitting module 116 to illuminate the shooting object, and the target shooting parameters are used to control the imaging module 118 to collect the image of the shooting object. Further, the controller 120 can control the light-emitting module 116 to illuminate the shooting object based on the target light-emitting parameters, and control the imaging module 118 to collect the image of the shooting object based on the target shooting parameters. By determining the target light-emitting parameters corresponding to the light-emitting module 116 and / or the target shooting parameters corresponding to the imaging module 118 according to the shooting information, problems such as overexposure or underexposure of the image of the shooting object collected by the imaging module 118 can be avoided, and the image quality of the oral cavity image captured by the oral cavity shooting device is improved.

[0067] As Figure 5 shown, in one embodiment, a control method for an oral cavity shooting device is provided, which can be applied to the above-mentioned oral cavity shooting device, and the method may include the following steps:

[0068] Step 510, obtain the shooting information of the oral cavity shooting device, and the shooting information is directly or indirectly related to the distance between the imaging module and the shooting object.

[0069] When the oral cavity shooting device is in an operating state, the shooting information of the oral cavity shooting device can be obtained, and the shooting information is directly or indirectly related to the distance between the imaging module and the shooting object. The shooting object may refer to the main object within the field of view of the imaging module. In an embodiment of the present application, the shooting object may be tissues or structures in the oral cavity (such as teeth, gums, oral mucosa, etc.). For example, when using the oral cavity shooting device to capture an image of the upper occlusal surface of the oral cavity (the occlusal surface refers to the tooth surface where the teeth occlude), the upper occlusal surface of the teeth may be the shooting object.

[0070] The shooting information is directly or indirectly related to the distance between the imaging module and the subject. It may mean that when the distance between the imaging module and the subject changes, the shooting information also changes, or it may mean that when the shooting information changes, the distance between the imaging module and the subject also changes. The shooting information is related to the distance between the imaging module and the subject, and the two, i.e., the shooting information and the distance, affect each other, or the shooting information is affected by the distance, or the distance is affected by the shooting information. Therefore, the shooting information can be used as a reference for adjusting the light-emitting parameters corresponding to the light-emitting module and / or the shooting parameters corresponding to the imaging module, and the light-emitting parameters corresponding to the light-emitting module and / or the shooting parameters corresponding to the imaging module are adjusted according to the shooting information of the oral imaging device.

[0071] In some embodiments, the shooting information of the oral imaging device may include, but is not limited to, at least one of the following types of information: the oral area corresponding to the subject; the distance between the imaging module and the subject; the area of the oral area corresponding to the subject; the shooting position of the imaging module in the user's oral cavity; the entrance state corresponding to the imaging module, and the entrance state includes the state outside the mouth or the state inside the mouth.

[0072] Among them, the oral area corresponding to the subject is used to indicate the position area of the subject in the oral cavity. The user's oral cavity can be divided into multiple oral areas. For example, the oral cavity can be divided into multiple tooth areas and / or multiple tooth surfaces. Further, the tooth areas may include, but are not limited to, the upper tooth area, the lower tooth area, the front tooth area, the posterior tooth area, etc., and the tooth surfaces may include, but are not limited to, the occlusal surface and the tooth side surface. The occlusal surface is the surface where the teeth bite, and the tooth side surface can further include the inner side surface and the outer side surface. The outer side surface is the surface of the tooth close to the lips, and the inner side surface is the surface of the tooth close to the tongue, etc.

[0073] When using the imaging module to shoot different oral areas, since different oral areas require different shooting distances, therefore, the distances between the imaging module and different oral areas are at least partially different. For example, the distance between the imaging module and the occlusal surface is different from the distance between the imaging module and the outer side surface. Or, in some usage forms of the oral imaging device, due to the influence of the shape of the dental arch, the distances between the imaging module and different oral areas are different. For example, taking the product structure shown in Figure 2A as an example, when the mouth opener 240 is connected to the main body 210, due to the influence of the shape of the dental arch, the fitting degrees of different oral areas with the mouth opener 240 are different, resulting in different distances between the imaging module and different oral areas.

[0074] The distance between the imaging module and the subject may refer to the distance value between the imaging module and the subject, and this distance value is directly used to characterize the distance between the imaging module and the subject.

[0075] The regional area of the oral region corresponding to the subject may refer to the regional area of the oral region where the subject is located. Further, the regional area of the oral region corresponding to the subject may be the area of the oral region where the subject is located that will appear in the image captured by the imaging module. When the distance between the imaging module and the subject is relatively far, the imaging module can capture more of the subject. Therefore, the regional area of the oral region corresponding to the subject will be relatively large; when the distance between the imaging module and the subject is relatively close, the number of subjects that the imaging module can capture decreases, and the oral region where the subject is located may not be fully presented in the image captured by the imaging module. Therefore, the regional area of the oral region corresponding to the subject will be relatively small.

[0076] The shooting position of the imaging module in the user's oral cavity, that is, the position of the imaging module relative to the user's oral cavity during shooting. Optionally, the shooting position may be the actual position where the imaging module is located. For example, Figure 3B taking [a certain situation] as an example, when the oral cavity shooting device is placed in the lower dental arch and the imaging module is placed on the tongue or the inner side close to the lower dental area, the corresponding shooting position of the imaging module may be the tongue or the inner side close to the lower dental area. When the subject remains unchanged, the shooting position of the imaging module in the user's oral cavity is different, and the distance from the subject is also different.

[0077] Optionally, since the internal space of the oral cavity is relatively narrow and the distance between the imaging module and the subject is also relatively small, the shooting position of the imaging module in the user's oral cavity can also be represented by the oral region of the subject captured by the imaging module. Taking Figure 3B [a certain situation] as an example, if the imaging module captures an image of the upper dental arch, the corresponding shooting position of the imaging module may be the upper occlusal surface.

[0078] The entrance state corresponding to the imaging module is used to indicate whether the imaging module is outside the oral cavity or inside the oral cavity. The entrance state may include an external oral state or an internal oral state. Among them, the external oral state means that the imaging module is outside the oral cavity, and the internal oral state means that the imaging module is inside the oral cavity. When the imaging module is in the external oral state and the internal oral state, the corresponding subjects are different, so the distance between the imaging module and the subject will also change; or, when the imaging module is in the external oral state and the internal oral state, limited by the internal space of the oral cavity, the distance between the imaging module in the external oral state and the subject will be different from the distance between the imaging module in the internal oral state and the subject; or, when the oral cavity shooting device is in the internal oral state and the external oral state, the corresponding product forms are different. Therefore, the distance between the imaging module in the external oral state and the subject will be different from the distance between the imaging module in the internal oral state and the subject.

[0079] By obtaining shooting information in multiple different dimensions, the accuracy and flexibility of subsequently determining the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module according to the shooting information can be improved. Moreover, combined with the actual use scenario of the oral shooting device, under different shooting information, the oral shooting device can more accurately adjust the target parameters, thereby improving the shooting effect of the imaging module, and making the images taken by the oral shooting device have relatively consistent effects when shooting different tooth surfaces and / or tooth areas, without overexposure or underexposure of the images, which helps to improve the accuracy of subsequent oral condition analysis using the images.

[0080] Step 520, determine the target parameters according to the shooting information, where the target parameters include the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module.

[0081] Since the distances between the imaging module on the shooting device and the object to be photographed are different, when using the light-emitting module to illuminate the object to be photographed, the light intensity received by the object to be photographed from the light-emitting module is different, and the light intensity reflected by the object to be photographed to the imaging module is also different, resulting in different light input amounts of the imaging module, and causing problems such as overexposure or underexposure of the images taken by the imaging module, which affects the image quality of the images taken by the imaging module.

[0082] Therefore, in the embodiments of the present application, the target parameters can be determined according to the shooting information related to the distance between the imaging module and the object to be photographed, where the target parameters include the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module. Among them, the target light-emitting parameters corresponding to the light-emitting module can be used to control the light-emitting module to illuminate the object to be photographed, and the target shooting parameters can be used to control the imaging module to collect images of the object to be photographed.

[0083] There may be a corresponding relationship between the target parameters and the shooting information. Different shooting information may respectively have corresponding target parameters, and at least some of the target parameters corresponding to different shooting information are different. That is to say, for different shooting information, the corresponding target parameters may be the same or different, but at least two (or two groups) of different shooting information have different corresponding target parameters.

[0084] As an implementation manner, the corresponding relationship between the target parameters and the shooting information can be a positive correlation relationship. When the shooting information increases, the target parameters can increase accordingly.

[0085] As another implementation manner, the corresponding relationship between the target parameters and the shooting information can be a discrete relationship. When the shooting information changes, the target parameters change accordingly. One (or a group of) shooting information corresponds to one (or a group of) target parameters, but the change trend of the target parameters does not necessarily conform to the trend of continuous increase / continuous decrease.

[0086] It should be noted that the correspondence between the target parameters and the shooting information can be preset, and this correspondence can be set according to actual needs. For oral shooting devices with different product forms, this correspondence can be different. The correspondence between the target parameters and the shooting information can be determined through tests of multiple experiments, so as to ensure that the oral shooting device can capture oral images with better quality under different shooting information.

[0087] In some embodiments, the target light-emitting parameters may include, but are not limited to, at least one of the following parameters: the target power corresponding to the light-emitting module, the target light-emitting brightness corresponding to the light-emitting module, and the target number of lights that emit light in the light-emitting module.

[0088] The power corresponding to the light-emitting module refers to the working power of the light-emitting module. The higher the power corresponding to the light-emitting module, the greater the intensity of the light emitted by the light-emitting module. The power corresponding to the light-emitting module can be dynamically adjusted according to the shooting information.

[0089] The light-emitting brightness corresponding to the light-emitting module refers to the brightness of the light emitted by the light-emitting module. The greater the light-emitting brightness corresponding to the light-emitting module, the greater the intensity of the light emitted by the light-emitting module. The light-emitting brightness corresponding to the light-emitting module can be dynamically adjusted according to the shooting information.

[0090] The number of lights that emit light in the light-emitting module refers to the number of lights that are lit in the light-emitting module, that is, the number of lights that emit light. The more the number of lights that emit light in the light-emitting module, the greater the intensity of the light emitted by the light-emitting module. The number of lights corresponding to the light-emitting module can be dynamically adjusted according to the shooting information.

[0091] The oral shooting device can determine the target light-emitting parameters corresponding to the light-emitting module according to the shooting information, and control the light-emitting module to illuminate the shooting object according to the target light-emitting parameters. The light-emitting module can work according to the target light-emitting parameters, so that the light emitted by the light-emitting module matches the current shooting information.

[0092] In some embodiments, the target shooting parameters may include, but are not limited to, at least one of the following parameters: the target exposure duration corresponding to the imaging module, the target exposure gain corresponding to the imaging module, the target exposure compensation corresponding to the imaging module, the target exposure expectation corresponding to the imaging module, and the target sensitivity corresponding to the imaging module.

[0093] The exposure duration corresponding to the imaging module refers to the time when light enters the image sensor when the imaging module is taking an image, that is, the time interval from when the shutter is opened to when it is closed. The exposure duration corresponding to the imaging module affects the brightness of the image. The longer the exposure duration corresponding to the imaging module, the more light enters the imaging module, and the greater the brightness of the image.

[0094] The exposure gain corresponding to the imaging module may refer to the magnification factor for amplifying the signal output by the image sensor. By amplifying the signal output by the image sensor, the brightness of the image can be increased. The greater the exposure gain corresponding to the imaging module, the greater the brightness of the image.

[0095] The exposure compensation corresponding to the imaging module may refer to adjusting the exposure amount of the image by changing the exposure value corresponding to the imaging module, thereby adjusting the brightness of the image. When the exposure compensation is to increase the exposure value, the exposure amount of the image is increased, and the brightness of the image is increased; when the exposure compensation is to decrease the exposure value, the exposure amount of the image is decreased, and the brightness of the image is decreased.

[0096] The exposure expectation corresponding to the imaging module defines the brightness level that the imaging module expects to achieve. The greater the exposure expectation corresponding to the imaging module, the greater the brightness of the image.

[0097] The oral cavity photographing device can determine the target photographing parameters corresponding to the imaging module according to the photographing information, and control the imaging module to collect an image of the photographing object according to the target photographing parameters. The imaging module can photograph the photographing object according to the target photographing parameters to obtain an image (such as an oral cavity image), so that the photographing parameters of the imaging module match the current photographing information.

[0098] The oral cavity photographing device can dynamically adjust the light-emitting parameters and / or photographing parameters in one or more dimensions according to the photographing information, so that the brightness of the image captured by the imaging module is adapted to the current photographing information, avoiding the situation that the captured image is overexposed or underexposed due to the change in the distance between the imaging module and the photographing object. For different photographing information, the imaging module can capture images with relatively consistent brightness performance, ensuring the image quality of the oral cavity images captured by the oral cavity photographing device.

[0099] Optionally, the oral cavity photographing device can only adjust the light-emitting parameters of the light-emitting module according to the photographing information to determine the target light-emitting parameters corresponding to the light-emitting module, without adjusting the photographing parameters of the imaging module. The photographing parameters of the imaging module can use the default set photographing parameters or the target photographing parameters adjusted last time.

[0100] Optionally, the oral cavity photographing device can only adjust the photographing parameters of the imaging module according to the photographing information to determine the target photographing parameters corresponding to the imaging module, without adjusting the light-emitting parameters of the light-emitting module. The light-emitting parameters of the light-emitting module can use the default set light-emitting parameters or the target light-emitting parameters adjusted last time.

[0101] Optionally, when the oral imaging device adjusts the light-emitting parameters of the light-emitting module and the imaging parameters of the imaging module according to the imaging information, the light-emitting parameters of the light-emitting module and the imaging parameters of the imaging module can be adjusted simultaneously, and the target light-emitting parameters corresponding to the light-emitting module and the target imaging parameters corresponding to the imaging module can be determined simultaneously.

[0102] Optionally, when the oral imaging device adjusts the light-emitting parameters of the light-emitting module and the imaging parameters of the imaging module according to the imaging information, the light-emitting parameters of the light-emitting module and the imaging parameters of the imaging module can be adjusted sequentially. For example, the light-emitting parameters of the light-emitting module can be adjusted first and then the imaging parameters of the imaging module can be adjusted, or the imaging parameters of the imaging module can be adjusted first and then the light-emitting parameters of the light-emitting module can be adjusted. This is not limited herein.

[0103] In some embodiments, under different imaging information, the types of target parameters adjusted by the oral imaging device each time may be the same or different; the oral imaging device can adjust all types of target parameters each time, or only adjust some types of target parameters. For example, the oral imaging device adjusts the light-emitting brightness corresponding to the light-emitting module according to the imaging information this time. When the imaging information changes next time, the oral imaging device adjusts the exposure expectation corresponding to the imaging module (the light-emitting brightness corresponding to the light-emitting module may remain unchanged), but is not limited thereto. Thereby, the accuracy and flexibility of parameter adjustment can be improved, and further the visual effect of the image obtained by the oral imaging device can be improved, and the image quality can be improved.

[0104] As an implementation manner, the oral imaging device can adopt a closed-loop control method to adjust the target parameters. For example, algorithms such as PID (Proportion Integral Differential) algorithm, fuzzy control, adaptive control, and optimal control can be used to implement closed-loop control to adjust the target parameters in real time. The oral imaging device can obtain real-time imaging information and adjust the target parameters according to the real-time imaging information. By adjusting the target parameters in a closed-loop control manner, the accuracy and adjustment fineness of the target parameters can be improved, and the image quality of the image captured by the oral imaging device can be improved.

[0105] In the embodiments of the present application, the oral imaging device can dynamically adjust the light-emitting parameters of the light-emitting module and / or the imaging parameters of the imaging module according to the imaging information. Since the imaging information is directly or indirectly related to the distance between the imaging module and the object to be imaged, the target light-emitting parameters when the light-emitting module illuminates the object to be imaged and / or the target imaging parameters when the imaging module captures an image can be accurately adjusted according to the imaging information. This can avoid problems such as overexposure or underexposure of the image of the object to be imaged captured by the imaging module due to different distances between the imaging module and the object to be imaged, improve the image quality of the oral image captured by the oral imaging device, and improve the performance of the oral imaging device.

[0106] In some embodiments, the imaging information may include the oral region corresponding to the object to be imaged, and the oral imaging device can determine the target parameters according to the oral region corresponding to the object to be imaged. The oral region may include the tooth region and / or the tooth surface, and there are at least two oral regions corresponding to different target parameters.

[0107] Optionally, the oral region may include the tooth surface. A user's oral cavity may include an inner side, an outer side, and an occlusal surface. Among them, the inner side may refer to the surface of the tooth close to the tongue, the outer side may refer to the surface of the tooth close to the lips, and the occlusal surface may refer to the surface of the tooth used for occlusion.

[0108] Optionally, the oral region may include the tooth region. A user's oral cavity may include one or more of the anterior tooth region and the posterior tooth region.

[0109] Exemplarily, Figure 6A is a schematic diagram of the oral region in an embodiment. As Figure 6A shown, the outer side may include the anterior tooth outer side 602 and the posterior tooth outer side. Further, the posterior tooth outer side includes the right posterior tooth outer side 604 (from the user's perspective, the right posterior tooth outer side 604 is located on the left side of the oral cavity) and the left posterior tooth outer side 606 (from the user's perspective, the left posterior tooth outer side 606 is located on the right side of the oral cavity).

[0110] Exemplarily, Figure 6B is a schematic diagram of the occlusal surface image captured by the imaging module in an embodiment. As Figure 6B shown, the oral region may include the upper occlusal surface and the lower occlusal surface. The imaging module can capture an image of the lower occlusal surface of the oral region and an image of the upper occlusal surface.

[0111] As an implementation manner, the target parameters corresponding to different oral regions may be the same or different. For example, as Figure 6AAs shown, when the oral cavity photographing device is directly in front of the user's oral cavity, the outer side surface 604 of the right posterior teeth and the outer side surface 606 of the left posterior teeth are symmetrical, so the outer side surface 604 of the right posterior teeth and the outer side surface 606 of the left posterior teeth can correspond to the same target parameters. For another example, the outer side surface 602 of the anterior teeth and the outer side surface 604 of the right posterior teeth or the outer side surface 606 of the left posterior teeth can respectively correspond to different target parameters.

[0112] In some embodiments, the oral cavity area corresponding to the subject may include any one of the occlusal surface, the inner side surface, and the outer side surface. Among them, the target light-emitting parameter corresponding to the occlusal surface is less than or equal to the target light-emitting parameter corresponding to the inner side surface, and / or the target light-emitting parameter corresponding to the occlusal surface is greater than or equal to the target light-emitting parameter corresponding to the outer side surface.

[0113] Exemplarily, when using the oral cavity photographing device to photograph the occlusal surface, since the user needs to open the oral cavity wide and then place the oral cavity photographing device on the upper dental arch or the lower dental arch of the oral cavity in order to allow the oral cavity photographing device to photograph the entire occlusal surface, therefore, when using the oral cavity photographing device to photograph the occlusal surface, the ambient light in the oral cavity is relatively large. When using the oral cavity photographing device to photograph the inner side surface, the user does not need to open the oral cavity as wide as when photographing the occlusal surface. Therefore, the ambient light in the oral cavity is relatively small. Therefore, the target light-emitting parameter corresponding to the occlusal surface can be less than or equal to the target light-emitting parameter corresponding to the inner side surface, so that the intensity of the light emitted by the light-emitting module when the oral cavity photographing device photographs the inner side surface is greater than or equal to the intensity of the light emitted by the light-emitting module when the oral cavity photographing device photographs the occlusal surface.

[0114] Exemplarily, when using the oral cavity photographing device to photograph the outer side surface, the ambient light is relatively large or the oral cavity photographing device is not affected by the ambient light. Therefore, the target light-emitting parameter corresponding to the occlusal surface can be greater than or equal to the target light-emitting parameter corresponding to the outer side surface, so that the intensity of the light emitted by the light-emitting module when the oral cavity photographing device photographs the occlusal surface is greater than or equal to the intensity of the light emitted by the light-emitting module when the oral cavity photographing device photographs the outer side surface.

[0115] In the above embodiments, the oral cavity photographing device can adjust the light-emitting parameters of the light-emitting module according to whether it is photographing the inner side surface, the occlusal surface, or the outer side surface of the teeth, so that the intensity of the light emitted by the light-emitting module matches the tooth surface corresponding to the subject, reducing the adverse effects of ambient light on the captured image and improving the image quality of the captured image.

[0116] Furthermore, the tooth surface includes the outer side surface of the anterior teeth and the outer side surface of the posterior teeth. In some embodiments, the oral cavity photographing device may be, for example, Figure 2AIn the shown product form, when using the oral cavity photographing device 200 to photograph the outer side surface, the mouth opener 240 is connected to the main body portion 210. The user can bite the mouth opener 240 or abut one end of the mouth opener 240 against the teeth. The mouth opener 240 can open the lips and maintain the position of the user's oral cavity.

[0117] When the mouth opener 240 is connected to the main body portion 210, the oral cavity photographing device 200 is not affected by ambient light. However, affected by the tooth form, since the curvature of the front teeth is larger and the curvature of the rear teeth is smaller (relatively flat), when using the oral cavity photographing device 200 to photograph the outer side surface of the front teeth, the distance between the outer side surface of the front teeth and the photographing portion 230 (i.e., the imaging module) is less than the distance between the outer side surface of the rear teeth and the photographing portion 230 (i.e., the imaging module) when using the oral cavity photographing device 200 to photograph the outer side surface of the rear teeth. Therefore, the target parameter corresponding to the outer side surface of the front teeth can be less than or equal to the target parameter corresponding to the outer side surface of the rear teeth.

[0118] Optionally, since the difference between the distance between the outer side surface of the front teeth and the photographing portion 230 (i.e., the imaging module) and the distance between the outer side surface of the rear teeth and the photographing portion 230 (i.e., the imaging module) is small, the light emitting parameters corresponding to the outer side surface of the front teeth and the outer side surface of the rear teeth can be the same, and the photographing parameters corresponding to the outer side surface of the front teeth and the outer side surface of the rear teeth can be different, that is, only the photographing parameters of the imaging module are adjusted without adjusting the light emitting parameters of the light emitting module, improving the accuracy of parameter adjustment. It should be noted that the light emitting parameters of the light emitting module and the photographing parameters of the imaging module can also be adjusted, which is not limited herein.

[0119] In the above embodiment, when using the oral cavity photographing device to photograph the outer side surface, the mouth opener is connected to the main body portion, and the corresponding target parameters can be adjusted according to whether the photographing object is the outer side surface of the front teeth or the outer side surface of the rear teeth, which can avoid the difference in the distance between the outer side surface of the front teeth and the outer side surface of the rear teeth and the imaging module caused by the tooth form, affecting the quality of the image photographed by the oral cavity photographing device, and improving the device performance of the oral cavity photographing device.

[0120] In some embodiments, the photographing information may include the photographing position of the imaging module in the user's oral cavity. The oral cavity photographing device can determine the target parameters according to the photographing position of the imaging module in the user's oral cavity. The photographing position of the imaging module in the user's oral cavity includes the tooth region and / or the tooth surface, and there are at least two photographing positions corresponding to different target parameters.

[0121] Optionally, the photographing position of the imaging module in the user's oral cavity can be represented by the oral cavity region where the photographing object photographed by the imaging module is located. Therefore, the photographing position corresponding to different target parameters can be similar to the target parameters of the oral cavity region corresponding to the photographing object introduced in the above embodiment, and will not be repeated here.

[0122] Optionally, the shooting position of the imaging module in the user's oral cavity can be represented by the oral cavity area closest to the imaging module in the user's oral cavity. In the case where the oral cavity areas closest to the imaging module in the user's oral cavity are different, the corresponding target parameters can be the same or different.

[0123] Optionally, the shooting position of the imaging module in the user's oral cavity can be the precise position of the imaging module relative to the oral cavity. The shooting position of the imaging module in the user's oral cavity can include the relative distance and relative direction (i.e., relative angle) between the imaging module and the shooting object. In the case where the relative distance and relative direction between the imaging module and the shooting object are different, the corresponding target parameters can be the same or different.

[0124] In the above embodiments, the oral cavity shooting device can determine the target parameters according to the oral cavity area where the shooting object is located and / or the shooting position of the imaging module in the user's oral cavity, so that the determined target parameters are adapted to the oral cavity area where the shooting object is located and / or the shooting position of the imaging module in the user's oral cavity, improving the accuracy of target parameter adjustment, and thus improving the image quality of the images obtained by the oral cavity shooting device when shooting different oral cavity areas and / or shooting at different shooting positions.

[0125] In some embodiments, the shooting information can include the distance between the imaging module and the shooting object. The oral cavity shooting device can determine the target parameters according to the distance between the imaging module and the shooting object. Further, the target parameter and the distance between the imaging module and the shooting object can be in a positive correlation relationship. When the distance between the imaging module and the shooting object is large, the attenuation of the light emitted by the light-emitting module during propagation is large. Therefore, a relatively large target parameter can be corresponding to avoid the situation that the captured image is too dark due to the long distance between the imaging module and the shooting object. When the distance between the imaging module and the shooting object is small, the attenuation of the light emitted by the light-emitting module during propagation is small. Therefore, a relatively small target parameter can be corresponding to avoid the situation that the captured image is overexposed due to the short distance between the imaging module and the shooting object.

[0126] Optionally, the positive correlation relationship between the target parameter and the distance between the imaging module and the shooting object can be a continuous curve relationship. The oral cavity shooting device can continuously adjust the target parameter according to the change in the distance between the imaging module and the shooting object.

[0127] Exemplarily, Figure 7A FIG. is a schematic diagram of the relationship between the target parameter and the distance in an embodiment. As Figure 7A shown, the target parameter and the distance between the imaging module and the shooting object can be a linear relationship. As the distance between the imaging module and the shooting object increases, the target parameter can increase.

[0128] Exemplarily, Figure 7B is a schematic diagram of the relationship between the target parameter and the distance in another embodiment. As Figure 7B shown, the relationship between the target parameter and the distance between the imaging module and the object to be photographed can be a non-linear relationship. As the distance between the imaging module and the object to be photographed increases, the target parameter can increase. Exemplarily, as the distance between the imaging module and the object to be photographed increases, the attenuation rate of the light emitted by the light-emitting module slows down. Therefore, the change rate of the target parameter can slow down.

[0129] It should be noted that since the target parameter cannot increase indefinitely, after the target parameter reaches the maximum value allowed to be set, even if the distance between the imaging module and the object to be photographed increases, it will no longer change. It can be considered that the oral photographing device is not in the state of photographing the oral cavity in this state, so the imaging module may not be controlled to capture an image, or the oral photographing device may output a prompt message to prompt that the distance between the imaging module and the object to be photographed is too far.

[0130] In the above embodiment, the oral photographing device can adjust the target parameter based on the continuous curve relationship between the target parameter and the distance between the imaging module and the object to be photographed, and smoothly adjust and transition the target parameter, improving the adjustment accuracy of the target parameter.

[0131] Optionally, the positive correlation between the target parameter and the distance between the imaging module and the object to be photographed can be a stepwise increasing relationship. The oral photographing device can adjust the target parameter stepwise according to the change in the distance between the imaging module and the object to be photographed. The positive correlation between the target parameter and the distance can include multiple distance intervals, and the multiple distance intervals can respectively correspond to different target parameters, and the target parameter corresponding to the first distance interval in the multiple distance intervals is less than the target parameter corresponding to the second distance interval, where the upper limit value of the first distance interval is less than or equal to the lower limit value of the second distance interval.

[0132] Exemplarily, Figure 7C is a schematic diagram of the relationship between the target parameter and the distance in another embodiment. As Figure 7C shown, the positive correlation between the target parameter and the distance between the imaging module and the object to be photographed can be a stepwise increasing relationship. The distance between the imaging module and the object to be photographed is divided into multiple distance intervals, and different distance intervals correspond to different target parameters. The oral photographing device can determine the target parameter according to the distance interval where the distance between the imaging module and the object to be photographed is located.

[0133] In some embodiments, the shooting information may include the area of the oral cavity region corresponding to the shooting object. The oral cavity shooting device may determine the target parameter according to the area of the oral cavity region corresponding to the shooting object. Further, the target parameter and the area of the oral cavity region corresponding to the shooting object may have a positive correlation. When the area of the oral cavity region corresponding to the shooting object is small, it indicates that the distance between the imaging module and the shooting object is large, and the attenuation of the light emitted by the light-emitting module during propagation is large. Therefore, a relatively large target parameter can be corresponding to avoid the situation that the captured image is too dark due to the relatively long distance between the imaging module and the shooting object. When the area of the oral cavity region corresponding to the shooting object is large, it indicates that the distance between the imaging module and the shooting object is small, and the attenuation of the light emitted by the light-emitting module during propagation is small. Therefore, a relatively small target parameter can be corresponding to avoid the situation that the captured image is overexposed due to the relatively short distance between the imaging module and the shooting object.

[0134] Optionally, the positive correlation between the target parameter and the area of the oral cavity region corresponding to the shooting object may be a continuous curve relationship. The oral cavity shooting device may continuously adjust the target parameter according to the distance change of the area of the oral cavity region corresponding to the shooting object.

[0135] Exemplarily, Figure 8A is a schematic diagram of the relationship between the target parameter and the area in one embodiment. As Figure 8A shown, the target parameter and the area of the oral cavity region corresponding to the shooting object may be a linear relationship. As the area of the oral cavity region corresponding to the shooting object increases, the target parameter may increase.

[0136] Exemplarily, Figure 8B is a schematic diagram of the relationship between the target parameter and the area in another embodiment. As Figure 8B shown, the target parameter and the area of the oral cavity region corresponding to the shooting object may be a non-linear relationship. As the area of the oral cavity region corresponding to the shooting object increases, the target parameter may increase.

[0137] Optionally, the positive correlation between the target parameter and the area of the oral cavity region corresponding to the shooting object may be a stepwise increasing relationship. The oral cavity shooting device may adjust the target parameter stepwise according to the area of the oral cavity region corresponding to the shooting object. The positive correlation between the target parameter and the area includes multiple area intervals, and the multiple area intervals respectively correspond to different target parameters, and the target parameter corresponding to the first area interval in the multiple area intervals is less than the target parameter corresponding to the second area interval, and the upper limit value of the first area interval is less than or equal to the lower limit value of the second area interval.

[0138] Exemplarily, Figure 8CSchematic diagram of the relationship between the target parameter and the area of the region in another embodiment. As Figure 8C shown, the positive correlation between the target parameter and the area of the oral region corresponding to the subject can be a stepwise increasing relationship. The area of the oral region corresponding to the subject is divided into multiple area intervals, and the target parameters corresponding to different area intervals are different. The oral imaging device can determine the target parameter according to the area interval in which the area of the oral region corresponding to the subject is located. By using a stepwise parameter adjustment method to adjust the target parameter, the number of adjustment methods can be reduced, the device resources occupied by parameter adjustment can be reduced, the hardware requirements for the device can be reduced, and the adjustment response speed can be improved.

[0139] In the embodiments of the present application, the oral imaging device can adjust the target parameter according to the correspondence between the target parameter and the imaging information, and adjust the target parameter according to the imaging information obtained in real time. As the distance between the imaging module and the subject increases, the target parameter is increased, which can avoid problems such as overexposure or underexposure of the image of the subject collected by the imaging module due to different distances between the imaging module and the subject, and improve the image quality of the oral image captured by the oral imaging device.

[0140] In some embodiments, the imaging information may include the entrance state corresponding to the imaging module, and the entrance state includes an external state or an internal state. The oral imaging device can determine the target parameter according to the entrance state corresponding to the imaging module. Among them, the external state and the internal state can respectively correspond to different target parameters.

[0141] Optionally, when the imaging module is in the internal state or the external state, the oral imaging device can respectively correspond to different product forms. Exemplarily, as Figure 2A and 2B shown, when the imaging module is in the external state, the mouth opener 240 is connected to the main body 210, and when the imaging module is in the internal state, the mouth opener 240 is disassembled from the main body 210. Since the oral imaging device corresponds to different product forms when the imaging module is in the internal state or the external state, and the images captured are affected differently, therefore, the internal state or the external state of the imaging module can respectively correspond to different target parameters.

[0142] Optionally, when the imaging module is in the internal state or the external state, the distance between the imaging module and the subject may be different. Therefore, the internal state or the external state of the imaging module can respectively correspond to different target parameters.

[0143] Optionally, when the imaging module is in the internal state or the external state, the imaging module is affected by ambient light differently. Therefore, the internal state or the external state of the imaging module can respectively correspond to different target parameters.

[0144] The imaging module being in an intraoral state or an extraoral state can respectively correspond to different target parameters, improving the accuracy of target parameter adjustment and further enhancing the quality of the captured images.

[0145] Furthermore, the target light-emitting parameter corresponding to the intraoral state is greater than or equal to the target light-emitting parameter corresponding to the extraoral state. When the imaging module is in the intraoral state, due to the relatively narrow oral cavity space, the ambient light of the imaging module is small. While when the imaging module is in the extraoral state, the ambient light is large or the oral cavity imaging device is not affected by the ambient light. Therefore, the target light-emitting parameter corresponding to the intraoral state can be greater than or equal to the target light-emitting parameter corresponding to the extraoral state, such that when the imaging module is in the intraoral state, the intensity of the light emitted by the light-emitting module is greater than or equal to the intensity of the light emitted by the light-emitting module when the imaging module is in the extraoral state.

[0146] In the above embodiments, the oral cavity imaging device can adjust the light-emitting parameter of the light-emitting module according to whether the imaging module is in the intraoral state or the extraoral state, so that the intensity of the light emitted by the light-emitting module matches the entrance state of the imaging module, reducing the adverse effects of ambient light on the captured images and improving the image quality of the captured images.

[0147] In some embodiments, the above-mentioned shooting information can be determined based on the images acquired by the oral cavity imaging device.

[0148] The oral cavity imaging device can collect images through the imaging module and identify the images collected by the imaging module to obtain the shooting information. Exemplarily, taking the shooting information including the oral cavity area corresponding to the shooting object as an example, the oral cavity imaging device can identify the oral cavity area included in the image to determine the oral cavity area corresponding to the shooting object.

[0149] Exemplarily, taking the shooting information including the area of the oral cavity area corresponding to the shooting object as an example, the oral cavity imaging device can detect the edge corresponding to the oral cavity area included in the image, and determine the image area corresponding to the oral cavity area according to the edge corresponding to the oral cavity area, and determine the area of the oral cavity area corresponding to the shooting object according to the area of the image area corresponding to the oral cavity area.

[0150] Exemplarily, taking the shooting information including the entrance state corresponding to the imaging module as an example, the oral cavity imaging device can identify the image content of the image and judge whether the imaging module is in the intraoral state or the extraoral state according to the identified image content to obtain the entrance state corresponding to the imaging module.

[0151] In some embodiments, the shooting information determined based on the acquired images includes the tooth surface corresponding to the shooting object, and the tooth surface includes at least one of the occlusal surface, the inner surface, and the outer surface.

[0152] In some embodiments, the oral cavity imaging device can be such asFigure 2A For the product structure shown, the shooting information determined based on the acquired image may include mouth opener information, and the mouth opener information includes that the mouth opener 240 is connected to the main body 210 or the mouth opener 240 is detached from the main body. When the mouth opener 240 is connected to the main body 210, the image collected by the imaging module may include edge features (such as circular or elliptical edge features) matching the opening shape of the mouth opener 240. If edge features matching the opening shape of the mouth opener 240 are recognized in the acquired image, it can be determined that the mouth opener information is that the mouth opener 240 is connected to the main body 210. Further, it can be determined that the imaging module is in an out-of-mouth state. When the mouth opener 240 is detached from the main body 210, the image collected by the imaging module does not include edge features matching the opening shape of the mouth opener 240. Therefore, if edge features matching the opening shape of the mouth opener 240 are not recognized in the acquired image, it can be determined that the mouth opener information is that the mouth opener 240 is detached from the main body 210.

[0153] As an alternative implementation, one or more neural networks may be stored in the oral imaging device, and the acquired image of the oral imaging device is recognized through the one or more neural networks to obtain shooting information. One neural network may correspond to one type of shooting information, or one neural network may also correspond to multiple types of shooting information.

[0154] In the embodiments of the present application, the oral imaging device can determine the shooting information based on the acquired image, improving the accuracy of the determined shooting information, thereby improving the accuracy of adjusting the target parameters. Moreover, it does not rely on external sensors, reducing the number of sensors provided in the oral imaging device, making the structure of the oral imaging device simpler and reducing costs.

[0155] In some embodiments, the oral imaging device may include a sensor, and the above shooting information may be determined by the information acquired by the sensor.

[0156] Optionally, the sensor may include at least one of, but is not limited to, a distance sensor, a position sensor, and an entrance sensor.

[0157] Among them, the distance sensor can be used to detect the distance between the imaging module and the object to be photographed. Exemplarily, the distance sensor may include, but is not limited to, an optical distance sensor (such as a laser distance sensor, an infrared distance sensor, etc.), an ultrasonic distance sensor, etc. For example, taking the distance sensor as an optical distance sensor, the distance sensor can emit light pulses and measure the time from the emission of the light pulses to the reflection back from the object to be photographed, and calculate the distance between the imaging module and the object to be photographed based on this time.

[0158] A position sensor can be used to detect the shooting position of the imaging module in the user's oral cavity. Exemplarily, the position sensor can include, but is not limited to, one or more of a gyroscope, an acceleration sensor, an IMU (Inertial Measurement Unit), etc. The oral cavity shooting device can determine the shooting position of the imaging module in the user's oral cavity according to the information collected by the position sensor, or the oral cavity shooting device can jointly determine the shooting position of the imaging module in the user's oral cavity according to the information collected by the position sensor and the image collected by the imaging module.

[0159] An entrance sensor can be used to detect the entrance state corresponding to the imaging module. Exemplarily, the entrance sensor can include, but is not limited to, a pressure sensor, etc. Taking the entrance sensor as a pressure sensor as an example, the oral cavity shooting device can obtain the pressure value collected by the pressure sensor, and this pressure value is used to characterize the magnitude of the acting force received by the shooting part. If this pressure value is greater than or equal to the pressure threshold, it can be determined that the imaging module is in the in-mouth state. If this pressure value is less than the pressure threshold, it can be determined that the imaging module is in the out-of-mouth state.

[0160] Exemplarily, taking the oral cavity shooting device as the Figure 2A product structure shown in the figure, the entrance sensor can include a sensor capable of detecting the connection state between the mouth opener 240 and the main body part 210. For example, the entrance sensor can include a Hall sensor, and this Hall sensor can be arranged at the corresponding connection position between the mouth opener 240 and the main body part 210 (such as arranged at one end where the mouth opener 240 is connected to the main body part 210, or arranged at the position on the main body part 210 for connecting the mouth opener 240), and the Hall sensor can be used to detect the connection state between the mouth opener 240 and the main body part 210.

[0161] In the embodiments of the present application, the oral cavity shooting device can determine the shooting information according to the information collected by the sensor, improving the accuracy and flexibility of the determined shooting information.

[0162] As an optional implementation manner, the above-mentioned shooting information can be jointly determined by the image obtained by the oral cavity shooting device and the information collected by the sensor. For example, part of the shooting information can be determined by the image obtained by the oral cavity shooting device, and the other part of the shooting information can be determined by the information collected by the sensor; or a certain shooting type can be jointly determined by the image obtained by the oral cavity shooting device and the information collected by the sensor, which is not limited herein.

[0163] In some embodiments, one or more of the above-mentioned shooting information can be preset, and the oral cavity shooting device can have a target structural component, and this target structural component is used to make one or more shooting information be preset values.

[0164] Taking the oral cavity shooting device as the Figure 2ATaking the product structure shown as an example, the target structural component may include an opener 240. When the opener 240 is connected to the main body 210, the corresponding entrance state of the imaging module may be an out-of-mouth state, the distance between the imaging module and the subject is a first preset distance, and the area of the oral cavity area corresponding to the subject is a first preset area. When the opener 240 is detached from the main body 210, the corresponding entrance state of the imaging module is an in-mouth state.

[0165] Exemplarily, when the opener 240 is connected to the main body 210, the imaging module cannot be inserted into the oral cavity. Therefore, it can be determined that the corresponding entrance state of the imaging module is an out-of-mouth state; when the corresponding entrance state of the imaging module is an in-mouth state, the opener 240 and the main body 210 need to be detached. Therefore, when the opener 240 is detached from the main body 210, it can be determined that the corresponding entrance state of the imaging module is an in-mouth state.

[0166] Exemplarily, the first preset distance may be the length of the opener 240 in the extending direction (perpendicular to the main body 210). When using the oral cavity photographing device, the opener 240 is connected to the main body 210, and one end of the opener 240 abuts against the teeth to open the lips. Therefore, the distance between the imaging module and the subject may be the length of the opener 240 in the extending direction.

[0167] Exemplarily, the first preset area may be related to the opening area of the opener 240. When using the oral cavity photographing device, the opener 240 is connected to the main body 210, and only the area where the outer side of the teeth falls into the opening of the opener 240 will be photographed by the imaging module. Therefore, the area of the oral cavity area photographed by the imaging module may be equal to the opening area of the opener 240, or an area value determined according to the opening area of the opener 240 (less than the opening area).

[0168] In this embodiment, the oral cavity photographing device can determine that part of the shooting information is a preset value according to the connection state between the opener 240 and the main body 210, simplifies the way of obtaining the shooting information, improves the efficiency of obtaining the shooting information and reduces the occupied device resources.

[0169] Taking the oral cavity photographing device as the product structure as shown in Figure 3A Taking the product structure shown as an example, the target structural component may include a positioning part 322. When the oral cavity photographing device is in the target use state, the distance between the imaging module and the subject may be a second preset distance, and the area of the oral cavity area corresponding to the subject is a second preset area.

[0170] Among them, the target usage state may include at least one of the following: the positioning portion 322 is in contact with the user's oral cavity, the oral cavity area corresponding to the captured object is determined, and the shooting position of the imaging module in the user's oral cavity is determined.

[0171] Exemplarily, a contact sensor is provided on the positioning portion 322, and the contact sensor can be used to detect whether the positioning portion 322 is in contact with an object. When the positioning portion 322 is in contact with the user's oral cavity, the distance between the imaging module and the captured object can be a fixed second preset distance. For example, Figure 9 taking as an example, when the positioning portion 322 is in contact with the outer side of the tooth, the second preset distance can be equal to or approximately equal to the length by which the positioning portion 322 protrudes from the support arm 320 (such as Figure 9 L in

[0172] Exemplarily, when using an oral cavity photographing device as shown in Figure 3A , if the oral cavity area corresponding to the captured object is determined, the distance between the imaging module and the captured object can be a fixed second preset distance. For example, when it is determined that the oral cavity area corresponding to the captured object is the upper occlusal surface and the shooting portion 330 of the oral cavity photographing device is at a determined position in the lower dental arch, the second preset distance can be the distance between the upper dental arch and the lower dental arch when the oral cavity is open. Optionally, the second preset distance can be obtained by testing a large amount of test data in advance. For example, by sampling a large amount of test data, the average distance between the upper dental arch and the lower dental arch when the oral cavity is open is determined as the second preset distance.

[0173] Exemplarily, when using an oral cavity photographing device as shown in Figure 3A , if the shooting position of the imaging module in the user's oral cavity is determined, the distance between the imaging module and the captured object can be a fixed second preset distance. For example, when it is determined that the shooting position of the imaging module in the user's oral cavity is the lower dental arch, the oral cavity area corresponding to the captured object is the upper occlusal surface. Therefore, the second preset distance can be the distance between the upper dental arch and the lower dental arch when the oral cavity is open.

[0174] Further, the area of the oral region corresponding to the subject is related to the distance between the imaging module and the subject. Therefore, when the distance between the imaging module and the subject is determined, the FOV of the imaging module is fixed, and the area of the oral region corresponding to the subject can also be determined in advance, and the area of the oral region corresponding to the subject can be a second preset area. The second preset area may have a positive correlation with the second preset distance. The larger the second preset distance is, the larger the second preset area is. Optionally, the second preset area can be obtained by testing a large amount of test data in advance. For example, it can be tested that the distance between the imaging module and the subject is the second preset distance, or the area of the oral region corresponding to the subject can be tested when the oral imaging device is in different target usage states, and the second preset area can be determined.

[0175] It should be noted that the second preset distances corresponding to different target usage states may be different or the same, and the second preset areas corresponding to different target usage states may be different or the same.

[0176] In this embodiment, the oral imaging device can determine some of the shooting information as preset values according to its own usage state, which simplifies the way of obtaining the shooting information, improves the efficiency of obtaining the shooting information, and reduces the occupied device resources.

[0177] In some embodiments, after adjusting the target parameters, the oral cavity can further adjust the target parameters according to the image collected by the imaging module. As Figure 10 shown, a control method for an oral imaging device is provided, which may include the following steps:

[0178] Step 1002, obtain the shooting information of the oral imaging device, and the shooting information is directly or indirectly related to the distance between the imaging module and the subject.

[0179] Step 1004, determine the target parameters according to the shooting information, and the target parameters include the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module.

[0180] The descriptions of steps 1002 to 1004 can refer to the relevant descriptions in the above embodiments, and will not be repeated here.

[0181] Step 1006, according to the target parameters, control the light-emitting module to illuminate the subject, and control the imaging module to obtain an image of the subject.

[0182] In the embodiments of the present application, the target parameters determined by the oral photographing device according to the photographing information may be relatively rough target parameters. For example, the oral photographing device determines the target parameters corresponding to the oral region according to the oral region corresponding to the photographed object. However, affected by some other factors (such as the position and angle of the oral photographing device), the target parameters corresponding to the oral region may be parameters with certain errors. The oral photographing device may further adjust the rough target parameters according to the image acquired by the imaging module.

[0183] The oral photographing device may control the light-emitting module to illuminate the photographed object according to the target parameters, and control the imaging module to acquire an image of the photographed object. By analyzing the image of the photographed object, it can be determined whether the current target parameters need to be adjusted again.

[0184] Optionally, the image of the photographed object acquired by the imaging module may be a preview image acquired by the imaging module. This preview image can be used for image analysis without actually being stored in the memory or presented to the user for viewing.

[0185] Step 1008, determine the image parameters corresponding to the image.

[0186] The oral photographing device may analyze the image acquired by the imaging module to obtain the image parameters corresponding to the image. In some embodiments, the image parameters may be parameters related to the light input amount of the imaging module. For example, the image parameters may include one or more of, but are not limited to, the brightness, contrast, noise, saturation, dynamic range (the ratio between the brightest part and the darkest part in the image), etc. of the image.

[0187] Exemplarily, taking the image parameters including the brightness of the image as an example, a brightness weighting algorithm may be used to calculate the brightness of the image. The oral photographing device may convert the image acquired by the imaging module into a grayscale image, and divide the grayscale image into multiple image regions. For example, the grayscale image may be divided into 9 image regions of 3*3, or the grayscale image may be divided into 25 image regions of 5*5, etc., but not limited thereto. The image brightness corresponding to each image region can be obtained, and a weighted average calculation is performed on the image brightnesses corresponding to the multiple image regions to obtain the brightness of the image.

[0188] Optionally, for different oral regions, different brightness weighting matrices may be used to perform a weighted average calculation on the image brightnesses corresponding to the multiple image regions. For example, when photographing the occlusal surface, the upper half region of the image acquired by the imaging module is darker and the lower half region is brighter. Therefore, the weight corresponding to the upper half image region may be greater than the weight corresponding to the lower half image region. Exemplarily, when the grayscale image is divided into 9 image regions of 3*3, the brightness weighting matrix corresponding to the occlusal surface may be as shown in formula (1):

[0189]

[0190] For another example, when photographing the inner side or the outer side, the middle part of the image obtained by the imaging module is brighter, and the surrounding part is darker. Therefore, the weight corresponding to the image area in the middle part can be smaller than the weight corresponding to the image area in the surrounding part. Exemplarily, the grayscale image is divided into 9 image areas of 3*3, and the brightness weighting matrix corresponding to the occlusal surface can be as shown in Equation (2):

[0191]

[0192] In this embodiment, for different oral regions, different brightness weighting matrices are used to perform weighted average calculation on the image brightness corresponding to multiple image areas respectively, improving the accuracy of the brightness of the calculated image and further improving the accuracy of subsequent target parameter adjustment.

[0193] In some embodiments, the oral photographing device can identify the ROI (Region of Interest) of the image obtained by the imaging module. The ROI area is the image area that needs to be focused on. For example, the ROI area can be the tooth area. The ROI area of the image can be analyzed to obtain the image parameters corresponding to the ROI area, and it is determined whether the image parameters meet the first shooting condition. Using the image parameters of the ROI area to evaluate whether the target parameters need to be adjusted can reduce the interference of other image areas and make the adjustment of the target parameters more accurate.

[0194] Optionally, for different oral regions, the shape of the ROI area can be different. For example, when photographing the occlusal surface, since the occlusal surface of the tooth usually presents a U-shaped, the shape of the ROI area can be set to U-shaped; when photographing the outer side, the outer side of the tooth usually presents an oval shape in the image, then the shape of the ROI area can be set to oval, etc., but not limited thereto. For different oral regions, different shapes of the ROI area can be set, further improving the accuracy of identifying the ROI area, thereby improving the accuracy of adjusting the target parameters.

[0195] It should be noted that other methods can also be used to calculate the image parameters of the image, and the embodiments of the present application do not limit the specific methods for determining the image parameters of the image.

[0196] Step 1010, determine whether the image parameters meet the first shooting condition. If so, execute step 1016; if not, execute step 1012.

[0197] The first shooting condition can be preset, and the first shooting condition can be used to define the image parameter conditions for which the quality of the image meets the requirements or expectations. For example, the first shooting condition can include the brightness range, contrast value range, noise range, etc. of the image, but is not limited thereto.

[0198] The oral cavity photographing device can determine whether the image parameters corresponding to the image meet the first shooting condition. If the image parameters corresponding to the image do not meet the first shooting condition, it indicates that the image quality of the image currently acquired by the imaging module does not meet the expectation, and the effect of the target parameters is not good, and adjustment is required. Then, the target parameters can be adjusted.

[0199] If the image parameters corresponding to the image meet the first shooting condition, it indicates that the image quality of the image currently acquired by the imaging module meets the expectation, and the effect of the target parameters is good, and no further adjustment is required. Then, the target parameters can be not adjusted.

[0200] Optionally, different image parameters can correspond to different first shooting conditions, and the number of parameters that meet the first shooting condition can be set. If the number of image parameters that meet the corresponding first shooting condition reaches the set number of parameters, it indicates that the image quality of the image currently acquired by the imaging module meets the expectation, and there is no need to further adjust the current target parameters. If the number of image parameters that meet the corresponding first shooting condition does not reach the set number of parameters, it indicates that the image quality of the image currently acquired by the imaging module does not meet the expectation, and then the current target parameters need to be adjusted.

[0201] Step 1012, adjust the target parameters according to the image parameters.

[0202] The oral cavity photographing device can adjust the current target parameters according to the image parameters corresponding to the image. For example, if the image parameters corresponding to the image are too large (such as the brightness of the image is too large, etc.), the target parameters can be reduced (such as reducing the light-emitting parameters of the light-emitting module and / or reducing the shooting parameters of the imaging module); if the image parameters corresponding to the image are too small (such as the brightness of the image is too small), the target parameters can be increased (such as increasing the light-emitting parameters of the light-emitting module and / or reducing the shooting parameters of the imaging module). It should be noted that there is not necessarily a negative correlation between the image parameters and the target parameters, and there may also be a positive correlation. For example, when the image parameters corresponding to the image are too large (such as the noise of the image is too large), the target parameters can be increased.

[0203] Optionally, since the adjustment of the target parameter in this embodiment is a further adjustment based on the target parameter determined according to the shooting information, an adjustment range can be set. The adjustment range can define the parameter value floating range corresponding to the target parameter determined according to the shooting information. For example, the luminous brightness corresponding to the light-emitting module can be ±5% of the luminous brightness of the eyes determined according to the shooting information, but not limited thereto. The oral cavity photographing device can adjust the target parameter within this adjustment range according to the image parameters corresponding to the image.

[0204] Step 1014, according to the adjusted target parameter, control the light-emitting module to illuminate the object to be photographed, and control the imaging module to re-acquire the image of the object to be photographed.

[0205] The oral cavity photographing device can, according to the adjusted target parameter, control the light-emitting module to illuminate the object to be photographed, and control the imaging module to re-acquire the image of the object to be photographed. The image parameters of the re-acquired image can be analyzed to obtain the image parameters of the re-acquired image, and it can be determined whether the image parameters of the re-acquired image meet the first shooting condition. If not, the target parameter continues to be adjusted until the image parameters of the re-acquired image meet the first shooting condition.

[0206] Step 1016, do not adjust the target parameter.

[0207] When the image parameters of the acquired image meet the first shooting condition, the oral cavity photographing device can not adjust the current target parameter. As an implementation manner, a shooting operation for triggering the imaging module to perform image shooting can be preset in advance. If the oral cavity photographing device detects the triggered shooting operation, it can respond to the shooting operation, and based on the current target parameter, control the imaging module to shoot an image including the object to be photographed. This image can be stored in the memory of the oral cavity photographing device and can be presented to the user according to requirements (such as displayed through a display screen or transmitted to other devices for display).

[0208] The shooting operation can include, but is not limited to, one or more of an operation of triggering a physical button, a gesture operation, a voice operation, etc. For example, the oral cavity photographing device can include a shooting button, and the user triggers the shooting operation by pressing the shooting button; for another example, it can be preset that when the time for keeping the oral cavity photographing device stationary reaches the target duration, the shooting operation is triggered; for another example, the oral cavity photographing device can collect and recognize voice commands such as "shoot" through a sound collection device (such as a microphone) to trigger the shooting operation.

[0209] Further, if it is detected that the shooting information has changed, the target parameter can be re-determined according to the changed shooting information.

[0210] In the embodiments of the present application, after the oral imaging device determines the target parameters according to the imaging information, the target parameters can be further adjusted according to the image parameters of the images acquired by the imaging module, which improves the accuracy of the target parameter adjustment and ensures the image quality of the oral images captured by the imaging module.

[0211] In some embodiments, only the shooting parameters of the imaging module are adjusted in the oral cavity. For example, Figure 11 As shown, the control method of the above-mentioned oral imaging device may further include the following steps:

[0212] Step 1102, when the oral imaging device is started, control the lighting module to illuminate the object to be imaged according to the preset lighting parameters.

[0213] In some usage scenarios of the oral imaging device, the lighting parameters of the lighting module can remain unchanged. The lighting parameters of the lighting module can be the preset lighting parameters. The oral imaging device can control the lighting module to illuminate the object to be imaged according to the preset lighting parameters.

[0214] Among them, some usage scenarios may include usage scenarios where the imaging module is not affected by ambient light and / or usage scenarios where the distance gap between the imaging module and the object to be imaged is small. For example, if the oral imaging device has the product structure as Figure 2A shown, when the user uses the oral imaging device to image the outer side of the teeth, the mouth opener 240 is connected to the main body 210. The imaging module is not affected by ambient light, and the distance gap between the outer sides of different tooth areas and the imaging module during imaging is small (this distance gap is caused by the shape of the teeth). Then, the oral imaging device can control the lighting module to illuminate the object to be imaged according to the preset lighting parameters, and the lighting parameters of the lighting module are not adjusted.

[0215] Step 1104, obtain the imaging information of the oral imaging device.

[0216] For the description of step 1104, reference can be made to the relevant descriptions in the above embodiments, and details will not be repeated here.

[0217] Step 1106, determine the target shooting parameters corresponding to the imaging module according to the imaging information.

[0218] The oral cavity can adjust the shooting parameters of the imaging module according to the acquired imaging information to determine the target shooting parameters corresponding to the imaging module, so that the shooting parameters of the imaging module are adapted to the current imaging information, thereby improving the image quality of the oral images captured by the imaging module.

[0219] In the embodiments of the present application, the lighting module can illuminate the object to be photographed according to preset lighting parameters, and only adjust the shooting parameters of the imaging module in the oral cavity. While ensuring the image quality of the oral cavity image captured by the imaging module, the complexity of parameter adjustment is reduced, and the parameter adjustment efficiency is improved.

[0220] In some embodiments, the oral cavity can first adjust the lighting parameters of the lighting module, and then adjust the shooting parameters of the imaging module. For example Figure 12 As shown, the control method of the above-mentioned oral cavity photographing device may further include the following steps:

[0221] Step 1202, obtain the shooting information of the oral cavity photographing device.

[0222] Step 1204, determine the target lighting parameters corresponding to the lighting module according to the shooting information.

[0223] Step 1206, control the lighting module to illuminate the object to be photographed according to the target lighting parameters.

[0224] For the descriptions of steps 1202 to 1206, reference can be made to the relevant descriptions in the above embodiments, and details will not be repeated here.

[0225] The oral cavity can adjust the lighting parameters of the lighting module according to the obtained shooting information, determine the target lighting parameters corresponding to the lighting module, so that the lighting parameters of the lighting module are adapted to the current shooting information, thereby improving the image quality of the oral cavity image captured by the imaging module.

[0226] Step 1208, obtain the light incident parameters corresponding to the imaging module.

[0227] Step 1210, determine the target shooting parameters corresponding to the imaging module according to the light incident parameters.

[0228] After determining the target lighting parameters corresponding to the lighting module and controlling the lighting module to illuminate the object to be photographed according to the target lighting parameters, the oral cavity photographing device can obtain the light incident parameters corresponding to the imaging module, and the light incident parameters can be used to characterize the light incident amount of the imaging module. Exemplarily, the light incident parameters may include the light incident amount, and the oral cavity photographing device may be provided with a photosensitive sensor to detect the light incident amount of the imaging module. Exemplarily, the light incident parameters may include parameters related to the light incident amount, such as image parameters related to the light incident amount (such as brightness, contrast, etc.), and the oral cavity photographing device can obtain the light incident parameters by analyzing the image captured by the imaging module.

[0229] The oral imaging device can adjust the imaging parameters of the imaging module according to the light incident parameters, determine the target imaging parameters corresponding to the imaging module, so that the light incident parameters of the adjusted imaging module meet the preset light incident parameter range, indicating that the light incident amount of the imaging module meets the expectation and can ensure that the oral images with better image quality are captured by the imaging module.

[0230] In the embodiment of the present application, the oral imaging device first adjusts the light emitting parameters of the light emitting module according to the imaging information, and then adjusts the imaging parameters of the imaging module according to the light incident parameters corresponding to the imaging module, so as to realize the dual adjustment of the light emitting parameters of the light emitting module and the imaging parameters of the imaging module, and the two are respectively based on different information as the basis for adjustment, improving the accuracy of the target parameter adjustment.

[0231] In some embodiments, the oral imaging device may be pre-set with multiple light emitting parameter grades, each light emitting parameter grade may correspond to a parameter value of one (or a group of) light emitting parameters, and each light emitting parameter grade corresponds to a value or range of one or more imaging information. After the oral imaging device obtains the imaging information, it can determine the first light emitting parameter grade matching the imaging information from the pre-set multiple light emitting parameter grades according to the imaging information, and determine the light emitting parameters corresponding to the first light emitting parameter grade as the target light emitting parameters corresponding to the light emitting module.

[0232] For example, the oral imaging device may be pre-set with 3 light emitting parameter grades: grade A, grade B and grade C. Among them, the light emitting parameters corresponding to grade A are greater than the light emitting parameters corresponding to grade B, and the light emitting parameters corresponding to grade B are greater than the light emitting parameters corresponding to grade C. Each light emitting parameter grade may correspond to a distance range. The oral imaging device can determine the distance between the imaging module and the imaging object, and compare the distance with the distance ranges respectively corresponding to the 3 light emitting parameter grades to determine the distance range where the distance is located, so as to determine the light emitting grade matched by the distance, and control the light emitting module to emit light according to the light emitting parameters of the matched light emitting grade.

[0233] For another example, the oral imaging device may be pre-set with 2 light emitting parameter grades: grade D, grade E. Among them, the light emitting parameters corresponding to grade D are greater than the light emitting parameters corresponding to grade E, grade D corresponds to the intraoral state, and grade E corresponds to the extraoral state. The oral imaging device can determine the entrance state of the imaging module. If the imaging module is in the intraoral state, it controls the light emitting module to emit light according to the light emitting parameters corresponding to grade D; if the imaging module is in the extraoral state, it controls the light emitting module to emit light according to the light emitting parameters corresponding to grade E.

[0234] In the embodiments of the present application, the oral imaging device can determine the light-emitting parameter gear that matches the imaging information according to the imaging information, and adjust the light-emitting parameters of the light-emitting module. While ensuring the quality of the image captured by the imaging module, by using the method of adjusting the light-emitting parameter gear, the adjustment of the light-emitting parameters of the light-emitting module is made simpler, the complexity of the light-emitting parameter adjustment is reduced, and the efficiency of the light-emitting parameter adjustment is improved.

[0235] In some embodiments, the user can also select the light-emitting gear of the light-emitting module according to actual needs. The user can perform a gear selection operation on the oral imaging device. In response to this gear selection operation, the oral imaging device determines the second light-emitting parameter gear selected by the user from a plurality of preset light-emitting parameter gears, and then controls the light-emitting module to illuminate the object to be imaged according to the light-emitting parameters corresponding to the second light-emitting parameter gear.

[0236] Among them, the gear selection operation may include, but is not limited to, one or more of operations such as triggering a physical button, a gesture operation, and a voice operation. For example, the oral imaging device may include a gear selection button, and the user selects the light-emitting gear by operating the gear selection button; or, for another example, the oral imaging device can collect and recognize a voice command such as "Please adjust to light-emitting gear X" through a sound collection device (such as a microphone) to trigger the imaging operation.

[0237] In the embodiments of the present application, the user can select the light-emitting gear of the light-emitting module according to actual needs, which meets the user's usage requirements and improves the user's usage experience.

[0238] In some embodiments, the oral imaging device may include a first imaging mode and / or a second imaging mode.

[0239] Among them, the first imaging mode may be a mode for imaging a normal oral color image. In the first imaging mode, the light-emitting module can emit light in a first wavelength band, and the light in the first wavelength band can be used for illumination. Further, in the first imaging mode, the light-emitting module does not emit light in a second wavelength band. Exemplarily, the light-emitting module may include a first type of lamp and a second type of lamp. The first type of lamp is used to emit light in the first wavelength band, and the second type of lamp is used to emit light in the second wavelength band. Then, in the first imaging mode, the first type of lamp can be in a lit state, and the second type of lamp is in an unlit state, thereby reducing the power consumption loss of the light-emitting module.

[0240] The second shooting mode may be a mode for shooting images for detecting oral problems or oral diseases existing in the oral cavity. For example, in this second shooting mode, images showing the fluorescence display of stimulated dental plaque may be shot, and / or thermal imaging images (for detecting local temperature increase caused by gingival inflammation) may be shot, and / or images obtained by laser speckle imaging (for detecting changes in gingival blood flow) may be shot, etc., which are not limited herein. By using the images shot in the second shooting mode, oral problems or oral diseases existing in the oral cavity can be better analyzed.

[0241] In the second shooting mode, the light emitting module may emit at least light in a second wavelength band, and the light in the second wavelength band can be used to enhance the presentation effect of harmful substances or diseased areas in the oral cavity in the image. Further, in the second shooting mode, the light emitting module may emit light in a first wavelength band or may not emit light in the first wavelength band. Exemplarily, in the second shooting mode, the second type of lamp is in the lit state, and the first type of lamp may be in the lit state (which can be partially lit or fully lit) or may be in the unlit state, where the lamp being in the lit state means the lamp is in the state of emitting light, and the lamp being in the unlit state means the lamp is not emitting light.

[0242] Since the wavelength bands of the light emitted by the light emitting module of the oral cavity shooting device are different in the first shooting mode and the second shooting mode, the intensities of the light in different wavelength bands are affected differently by the distance between the imaging module and the shooting object, and are also affected differently by the ambient light. Therefore, the target parameters determined in the first shooting mode are at least partially different from the target parameters determined in the second shooting mode, which can improve the accuracy of target parameter adjustment and the quality of the images obtained by the oral cavity shooting device in different shooting modes.

[0243] In some embodiments, when the oral cavity shooting device is in the first shooting mode, the target shooting parameters are determined according to the shooting information. In this first shooting mode, the light emitting parameters corresponding to the light emitting module may be preset light emitting parameters; and / or when the oral cavity shooting device is in the second shooting mode, the target light emitting parameters and target shooting parameters are determined according to the shooting information.

[0244] When the oral cavity shooting device is in the first shooting mode, the light emitting module may only emit light in a first wavelength band, and the light emitted by the light emitting module serves as illumination. Compared with adjusting the light emitting parameters of the light emitting module, by adjusting the shooting parameters of the imaging module, the quality of the image can be improved more significantly. Therefore, when the oral cavity shooting device is in the first shooting mode, the light emitting parameters corresponding to the light emitting module may be preset light emitting parameters, that is, the light emitting parameters corresponding to the light emitting module remain unchanged, and the oral cavity shooting device only adjusts the shooting parameters of the imaging module according to the shooting information, improving the efficiency of parameter adjustment.

[0245] Exemplarily, the light-emitting module of the oral imaging device may include two white lights (for emitting light in the first band) and four purple lights (for emitting light in the second band). When the oral imaging device is in the first shooting mode, the four purple lights may be in an off state, and the two white lights are in an on state. The light-emitting parameters of the light-emitting module and the shooting parameters of the imaging module may be as shown in Table 1.

[0246] Table 1

[0247] Oral region Purple light brightness White light 1 brightness White light 2 brightness Automatic exposure expected mean Upper occlusal surface 0％ 100％ 10％ 1000 Lower occlusal surface 0％ 100％ 10％ 788 Outer surface of anterior teeth 0％ 100％ 10％ 960 Outer surface of posterior teeth 0％ 100％ 10％ 1500 Inner surface 0％ 100％ 10％ 2500

[0248] When the oral imaging device is in the second shooting mode, the light-emitting module emits at least light in the second band to enhance the presentation effect of harmful substances or diseased areas in the oral cavity in the image. The light in the second band is easily affected by the distance between the imaging module and the subject. Therefore, when the oral imaging device is in the second shooting mode, the oral imaging device can jointly adjust the light-emitting parameters of the light-emitting module and the shooting parameters of the imaging module according to the shooting information.

[0249] In some embodiments, since the light-emitting module emits light in the second band in the second shooting mode, if the light in the second band is visible light such as purple light or blue light, the color of the image captured by the imaging module will be rather strange. Therefore, the light-emitting module can also emit light in the first band to fill light through the emitted light in the first band, making the white balance of the image captured by the imaging module better and improving the color presentation of the image captured by the imaging module.

[0250] Furthermore, since the light in the first band and the light in the second band are affected by ambient light differently, when the shooting information changes, the parameter adjustment value corresponding to the light in the first band is different from the parameter adjustment value corresponding to the light in the second band.

[0251] Among them, the parameter adjustment value may refer to the difference between the light-emitting parameters corresponding to the shooting information before the change and the light-emitting parameters corresponding to the shooting information after the change. Among them, the parameter adjustment value corresponding to the light in the first band may refer to the parameter adjustment value of the first type of lamp, and the parameter adjustment value corresponding to the light in the second band may refer to the parameter adjustment value of the second type of lamp.

[0252] Furthermore, since there is usually more white light in ambient light, the ambient light has a greater impact on the light in the first band and a smaller impact on the light in the second band. Therefore, when the shooting information changes, the parameter adjustment value corresponding to the light in the first band is greater than the parameter adjustment value corresponding to the light in the second band.

[0253] Exemplarily, the parameter adjustment values corresponding to the light of the first band for photographing the occlusal surface and the outer side of the oral cavity are greater than the parameter adjustment values corresponding to the light of the second band for photographing the occlusal surface and the outer side of the oral cavity.

[0254] Adjusting the corresponding light-emitting parameters for lights of different bands improves the adjustment accuracy of the light-emitting parameters of the light-emitting module, and further improves the image quality of the images captured by the imaging module.

[0255] Exemplarily, the light-emitting module of the oral cavity photographing device may include 2 white lights (for emitting light of the first band) and 4 purple lights (for emitting light of the second band). When the oral cavity photographing device is in the second photographing mode, the 4 purple lights may be in the lit state, 1 white light is in the lit state, and the other white light is in the unlit state. The light-emitting parameters of the light-emitting module and the photographing parameters of the photographing module may be as shown in Table 2.

[0256] Table 2

[0257] Oral region Purple light brightness White light 1 brightness White light 2 brightness Automatic exposure expected mean Upper occlusal surface 100％ 50％ 0％ 1000 Lower occlusal surface 100％ 50％ 0％ 960 Outer surface of anterior teeth 70％ 10％ 0％ 1500 Outer surface of posterior teeth 80％ 10％ 0％ 1500 Inner surface 100％ 50％ 0％ 1500

[0258] In the above embodiments, when the oral cavity photographing device is in the second photographing mode, the oral cavity photographing device can jointly adjust the light-emitting parameters of the light-emitting module and the photographing parameters of the imaging module according to the photographing information, improving the image quality of the images captured in the second photographing mode and helping to perform a more accurate analysis of the oral cavity condition subsequently.

[0259] In some embodiments, whether the oral cavity photographing device is in the first photographing mode or the second photographing mode can be selected by the user according to needs. The oral cavity photographing device can determine the selected photographing mode in response to the triggered mode selection operation and control the oral cavity photographing device to operate in the selected photographing mode by the user. This can meet the different usage requirements of the user and improve the user experience.

[0260] In some embodiments, the oral cavity photographing device can automatically switch between the first photographing mode and the second photographing mode and capture images in both photographing modes during one photographing operation. As Figure 13 shown, the above method may further include the following steps:

[0261] Step 1302, when the oral cavity photographing device is started, control the oral cavity photographing device to be in the first photographing mode.

[0262] When the oral cavity photographing device is started, the oral cavity photographing device can be default set to be in the first photographing mode. Since the power consumption of the light-emitting module in the first photographing mode is less than that in the second photographing mode, the power consumption loss of the oral cavity photographing device can be saved.

[0263] Step 1304: In response to a shooting operation, control the imaging module to capture an image of the shooting object corresponding to the first shooting mode.

[0264] Step 1306: Control the oral imaging device to be in the second shooting mode.

[0265] Step 1308: Control the imaging module to capture an image of the shooting object corresponding to the second shooting mode.

[0266] If the oral imaging device detects a triggered shooting operation, it can respond to this shooting operation. First, in the first shooting mode, control the imaging module to capture an image of the shooting object corresponding to the first shooting mode. Then, switch to the second shooting mode, and in the second shooting mode, control the imaging module to capture an image of the shooting object corresponding to the second shooting mode. Therefore, in response to a single triggered shooting operation, the oral imaging device can obtain an image of the shooting object corresponding to the first shooting mode (such as a color image of the oral cavity), and an image of the shooting object corresponding to the second shooting mode (such as an image that stimulates the fluorescence effect of dental plaque).

[0267] In the embodiments of the present application, in response to a single triggered shooting operation, the oral imaging device can obtain images of the shooting object in two different shooting modes, improving the richness of the images captured by the oral imaging device, simplifying the user operation, and enhancing the usability of the oral imaging device.

[0268] In some embodiments, an oral imaging device is provided. The oral imaging device includes an imaging module, a lighting module, and a controller. The controller is respectively connected to the imaging module and the lighting module. The controller is configured to:

[0269] Obtain shooting information of the oral imaging device, where the shooting information is directly or indirectly related to the distance between the imaging module and the shooting object;

[0270] Determine target parameters according to the shooting information. The target parameters include target lighting parameters corresponding to the lighting module and / or target shooting parameters corresponding to the imaging module. The target lighting parameters are used to control the lighting module to illuminate the shooting object, and the target shooting parameters are used to control the imaging module to capture an image of the shooting object.

[0271] In some embodiments, the controller is further configured to perform at least some of the steps of the methods described in the above embodiments.

[0272] As Figure 14 shown, in one embodiment, a control device 1400 of an oral imaging device is provided. It can be applied to the above-mentioned oral imaging device. The control device 1400 of the oral imaging device includes an acquisition module 1410 and a parameter determination module 1420.

[0273] An acquisition module 1410, configured to acquire shooting information of an oral cavity shooting device, where the shooting information is directly or indirectly related to the distance between the imaging module and the object to be shot.

[0274] A parameter determination module 1420, configured to determine target parameters according to the shooting information, where the target parameters include target light-emitting parameters corresponding to the light-emitting module and / or target shooting parameters corresponding to the imaging module. The target light-emitting parameters are used to control the light-emitting module to illuminate the object to be shot, and the target shooting parameters are used to control the imaging module to collect an image of the object to be shot.

[0275] In one embodiment, the oral cavity shooting device includes a first shooting mode and / or a second shooting mode;

[0276] In the first shooting mode, the light-emitting module emits light in a first wavelength band, and the light in the first wavelength band is used for illumination. In the second shooting mode, the light-emitting module emits at least light in a second wavelength band, and the light in the second wavelength band is used to enhance the presentation effect of harmful substances or diseased areas in the oral cavity in the image;

[0277] The target parameters determined in the first shooting mode are at least partially different from the target parameters determined in the second shooting mode.

[0278] In one embodiment, the parameter determination module 1420 is further configured to, when the oral cavity shooting device is in the first shooting mode, determine the target shooting parameters according to the shooting information. In the first shooting mode, the light-emitting parameters corresponding to the light-emitting module are preset light-emitting parameters; and / or, when the oral cavity shooting device is in the second shooting mode, determine the target light-emitting parameters and the target shooting parameters according to the shooting information.

[0279] In one embodiment, in the second shooting mode, the light-emitting module also emits light in the first wavelength band. When the shooting information changes, the parameter adjustment value corresponding to the light in the first wavelength band is different from the parameter adjustment value corresponding to the light in the second wavelength band.

[0280] In one embodiment, when the shooting information changes, the parameter adjustment value corresponding to the light in the first wavelength band is greater than the parameter adjustment value corresponding to the light in the second wavelength band.

[0281] In one embodiment, the first wavelength band includes 380 to 750 nanometers; the second wavelength band includes at least one of 350 to 500 nanometers, 700 to 2500 nanometers, 2500 nanometers to 1 millimeter, and 100 to 400 nanometers.

[0282] In one embodiment, the control device 1400 of the oral cavity shooting device further includes a mode control module and an image acquisition module.

[0283] A mode control module, configured to control an oral photographing device to be in a first photographing mode when the oral photographing device is started.

[0284] An image acquisition module, configured to control an imaging module to acquire an image corresponding to the first photographing mode of a photographing object in response to a photographing operation.

[0285] The mode control module is further configured to control the oral photographing device to be in a second photographing mode after acquiring, through the imaging module, an image corresponding to the first photographing mode of the photographing object.

[0286] The image acquisition module is further configured to control the imaging module to acquire an image corresponding to the second photographing mode of the photographing object.

[0287] In one embodiment, the photographing information includes at least one of the following:

[0288] The oral region corresponding to the photographing object;

[0289] The distance between the imaging module and the photographing object;

[0290] The area of the oral region corresponding to the photographing object;

[0291] The photographing position of the imaging module in the user's oral cavity;

[0292] The entrance state corresponding to the imaging module, and the entrance state includes an outside-of-mouth state or an inside-of-mouth state.

[0293] In one embodiment, the oral region includes a tooth region and / or a tooth surface, and there are at least two oral regions respectively corresponding to different target parameters; and / or,

[0294] The photographing position of the imaging module in the user's oral cavity includes a tooth region and / or a tooth surface, and there are at least two photographing positions respectively corresponding to different target parameters.

[0295] In one embodiment, the tooth surface includes any one of an occlusal surface, an inner side surface, and an outer side surface;

[0296] The target light-emitting parameter corresponding to the occlusal surface is less than or equal to the target light-emitting parameter corresponding to the inner side surface, and / or, the target light-emitting parameter corresponding to the occlusal surface is greater than or equal to the target light-emitting parameter corresponding to the outer side surface.

[0297] In one embodiment, the oral photographing device includes a main body portion and an oral opener; the tooth surface includes an outer side surface of anterior teeth and an outer side surface of posterior teeth;

[0298] When the oral opener is connected to the main body portion, the target parameter corresponding to the outer side surface of anterior teeth is less than or equal to the target parameter corresponding to the outer side surface of posterior teeth.

[0299] In one embodiment, the target light-emitting parameter includes at least one of the following: the target power corresponding to the light-emitting module, the target light-emitting brightness corresponding to the light-emitting module, and the target number of lights that emit light in the light-emitting module;

[0300] The target shooting parameter includes at least one of the following: the target exposure duration corresponding to the camera module, the target exposure gain corresponding to the camera module, the target exposure compensation corresponding to the camera module, the target exposure expectation corresponding to the camera module, and the target sensitivity corresponding to the camera module;

[0301] The target parameter is positively correlated with the above-mentioned distance;

[0302] The target parameter is positively correlated with the above-mentioned area of the region;

[0303] In one embodiment, the positive correlation between the target parameter and the above-mentioned distance includes multiple distance intervals, and the multiple distance intervals respectively correspond to different target parameters, and the target parameter corresponding to the first distance interval in the multiple distance intervals is less than the target parameter corresponding to the second distance interval, and the upper limit value of the first distance interval is less than or equal to the lower limit value of the second distance interval;

[0304] and / or,

[0305] The positive correlation between the target parameter and the above-mentioned area of the region includes multiple area intervals, and the multiple area intervals respectively correspond to different target parameters, and the target parameter corresponding to the first area interval in the multiple area intervals is less than the target parameter corresponding to the second area interval, and the upper limit value of the first area interval is less than or equal to the lower limit value of the second area interval.

[0306] In one embodiment, the external oral state and the internal oral state respectively correspond to different target parameters.

[0307] In one embodiment, the target light-emitting parameter corresponding to the internal oral state is greater than or equal to the target light-emitting parameter corresponding to the external oral state.

[0308] In one embodiment, the shooting information is determined according to the image acquired by the oral cavity photographing device.

[0309] In one embodiment, the shooting information determined according to the acquired image includes the tooth surface corresponding to the shooting object, and the tooth surface includes at least one of the occlusal surface, the inner side surface, and the outer side surface; and / or,

[0310] The oral cavity photographing device includes a main body part and an oral opener, and the oral opener is detachably connected to the main body part. The shooting information determined according to the acquired image includes the oral opener information, and the oral opener information includes that the oral opener is connected to the main body part, or the oral opener is detached from the main body part.

[0311] In one embodiment, the oral photographing device includes a sensor, and the photographing information is determined by the information acquired by the sensor.

[0312] In one embodiment, the sensor includes at least one of a distance sensor, a position sensor, and an entrance sensor;

[0313] The distance sensor is used to detect the distance between the imaging module and the object to be photographed;

[0314] The position sensor is used to detect the photographing position;

[0315] The entrance sensor is used to detect the entrance state corresponding to the imaging module;

[0316] The oral photographing device includes a main body and a mouth opener. The mouth opener is detachably connected to the main body, and the entrance sensor is used to detect the connection state between the mouth opener and the main body.

[0317] In one embodiment, the oral photographing device has a target structural component, and the target structural component is used to make one or more pieces of photographing information be preset values.

[0318] In one embodiment, the target structural component includes a mouth opener. The oral photographing device further includes a main body, and the mouth opener is detachably connected to the main body;

[0319] When the mouth opener is connected to the main body, the entrance state corresponding to the imaging module is an outside-of-the-mouth state, the distance between the imaging module and the object to be photographed is a first preset distance, and the area of the oral cavity area corresponding to the object to be photographed is a first preset area;

[0320] When the mouth opener is detached from the main body, the entrance state corresponding to the imaging module is an inside-of-the-mouth state.

[0321] In one embodiment, the target structural component includes a positioning portion, and the positioning portion is connected to the imaging module;

[0322] When the oral photographing device is in a target usage state, the distance between the imaging module and the object to be photographed is a second preset distance, and the area of the oral cavity area corresponding to the object to be photographed is a second preset area;

[0323] Wherein, the target usage state includes at least one of the following: the positioning portion is in contact with the user's oral cavity, the oral cavity area corresponding to the object to be photographed is determined, and the photographing position of the imaging module in the user's oral cavity is determined.

[0324] In one embodiment, the control device 1400 of the oral photographing device further includes a lighting control module, an image acquisition module, a parameter analysis module, and an adjustment module.

[0325] The lighting control module is used to control the lighting module to illuminate the object to be photographed according to the target parameters.

[0326] The image acquisition module is used to control the camera module to acquire an image of the object to be photographed.

[0327] The parameter analysis module is used to determine the image parameters corresponding to the image.

[0328] The adjustment module is used to adjust the target parameters according to the image parameters if the image parameters do not meet the first shooting condition.

[0329] The lighting control module is also used to control the lighting module to illuminate the object to be photographed according to the adjusted target parameters.

[0330] The image acquisition module is also used to control the camera module to re-acquire an image of the object to be photographed.

[0331] In one embodiment, the lighting control module is also used to control the lighting module to illuminate the object to be photographed according to the preset lighting parameters when the oral cavity photographing device is started.

[0332] The parameter determination module 1420 is also used to determine the target shooting parameters corresponding to the camera module according to the shooting information.

[0333] In one embodiment, the target parameters include the target lighting parameters corresponding to the lighting module. The control device 1400 of the oral cavity photographing device further includes a light input acquisition module.

[0334] The lighting control module is also used to control the lighting module to illuminate the object to be photographed according to the target lighting parameters.

[0335] The light input acquisition module is used to acquire the light input parameters corresponding to the camera module.

[0336] The parameter determination module 1420 is also used to determine the target shooting parameters corresponding to the camera module according to the light input parameters.

[0337] In one embodiment, the parameter determination module 1420 is also used to determine the first lighting parameter gear that matches the shooting information from a plurality of preset lighting parameter gears according to the shooting information; and determine the lighting parameters corresponding to the first lighting parameter gear as the target lighting parameters corresponding to the lighting module.

[0338] In one embodiment, the control device 1400 of the oral cavity photographing device further includes a gear selection module.

[0339] The gear selection module is used to determine the second lighting parameter gear selected by the user from a plurality of preset lighting parameter gears in response to a gear selection operation.

[0340] The lighting control module is further configured to control the lighting module to illuminate the object to be photographed according to the lighting parameters corresponding to the second lighting parameter gear.

[0341] In one embodiment, the imaging module includes a wide-angle camera;

[0342] When the imaging module is used to photograph the occlusal surface, in the oral cavity image captured by the wide-angle camera, the proportion of the occlusal surface area is greater than the target proportion threshold; the proportion refers to the proportion of the occlusal surface area included in the oral cavity image to the complete occlusal surface of the user's oral cavity.

[0343] In one embodiment, the field of view (FOV) corresponding to the wide-angle camera is greater than or equal to 140°.

[0344] In the embodiments of the present application, the oral cavity photographing device can dynamically adjust the lighting parameters of the lighting module and / or the photographing parameters of the imaging module according to the photographing information. Since the photographing information is directly or indirectly related to the distance between the imaging module and the object to be photographed, the target lighting parameters when the lighting module illuminates the object to be photographed and / or the target photographing parameters when the imaging module takes images can be accurately adjusted according to the photographing information. This can avoid problems such as overexposure or underexposure of the image of the object to be photographed collected by the imaging module due to different distances between the imaging module and the object to be photographed, improve the image quality of the oral cavity image captured by the oral cavity photographing device, and improve the performance of the oral cavity photographing device.

[0345] Figure 15 It is a structural block diagram of the oral cavity photographing device in another embodiment. As Figure 15 shown, the oral cavity photographing device 1500 may include one or more of the following components: a processor 1510 and a memory 1520 coupled to the processor 1510, where the memory 1520 may store one or more computer programs, and the one or more computer programs may be configured to be executed by one or more processors 1510 to implement the methods described in the above embodiments.

[0346] The processor 1510 may include one or more processing cores. The processor 1510 is connected to various parts within the oral cavity imaging device 1500 through various interfaces and circuits. By running or executing instructions, programs, code sets, or instruction sets stored in the memory 1520, and by calling the data stored in the memory 1520, it executes various functions of the oral cavity imaging device 1500 and processes data. Optionally, the processor 1510 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). The processor 1510 may integrate a combination of one or several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for the rendering and drawing of display content; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1510 and may be implemented separately through a communication chip.

[0347] The memory 1520 may include random access memory (RAM) and may also include read-only memory (ROM). The memory 1520 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 1520 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for implementing at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc. The data storage area may also store data created during the use of the oral cavity imaging device 1500.

[0348] It can be understood that the oral cavity imaging device 1500 may include more or fewer structural elements than those in the above structural block diagram. For example, it includes a display device, a power module, physical buttons, a WiFi (Wireless Fidelity) module, a speaker, a Bluetooth module, a sensor, etc., and will not be limited here.

[0349] An embodiment of the present application discloses a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it implements the methods described in the above embodiments.

[0350] An embodiment of the present application discloses a computer program product, including a computer program, and when the computer program is executed by a processor, it can implement the methods described in the above embodiments.

[0351] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disc, a ROM, etc.

[0352] Any reference to a memory, storage, database, or other medium as used herein may include non-volatile and / or volatile memory. Suitable non-volatile memory may include ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache. By way of illustration and not limitation, RAM can be in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), memory bus direct RAM (Rambus DRAM, RDRAM), and direct memory bus dynamic RAM (DirectRambus DRAM, DRDRAM).

[0353] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0354] In various embodiments of the present application, it should be understood that the magnitudes of the serial numbers of the above processes do not necessarily imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0355] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0356] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0357] The control method and device of an oral photographing device and the oral photographing device disclosed in the embodiments of the present application have been introduced in detail above. Specific examples are used herein to elaborate the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. At the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A control method for an oral photographing device, characterized in that, Applied to an oral imaging device, the oral imaging device including an imaging module and a lighting module, the method comprising: Obtaining imaging information of the oral imaging device, the imaging information being directly or indirectly related to the distance between the imaging module and the subject; Determining target parameters according to the imaging information, the target parameters including target lighting parameters corresponding to the lighting module and / or target imaging parameters corresponding to the imaging module, the target lighting parameters being used to control the lighting module to illuminate the subject, and the target imaging parameters being used to control the imaging module to capture an image of the subject.

2. The method according to claim 1, wherein The oral imaging device includes a first imaging mode and / or a second imaging mode; In the first imaging mode, the lighting module emits light in a first wavelength band, the light in the first wavelength band being used for illumination. In the second imaging mode, the lighting module emits at least light in a second wavelength band, the light in the second wavelength band being used to enhance the presentation effect of harmful substances or diseased areas in the oral cavity in the image; There are at least some differences between the target parameters determined in the first imaging mode and the target parameters determined in the second imaging mode.

3. The method according to claim 2, wherein The determining target parameters according to the imaging information includes: When the oral imaging device is in the first imaging mode, determining target imaging parameters according to the imaging information. In the first imaging mode, the lighting parameters corresponding to the lighting module are preset lighting parameters; and / or, When the oral imaging device is in the second imaging mode, determining target lighting parameters and target imaging parameters according to the imaging information.

4. The method according to claim 2, wherein In the second imaging mode, the lighting module also emits the light in the first wavelength band. When the imaging information changes, the parameter adjustment value corresponding to the light in the first wavelength band is different from the parameter adjustment value corresponding to the light in the second wavelength band.

5. The method according to claim 4, characterized in that When the imaging information changes, the parameter adjustment value corresponding to the light in the first wavelength band is greater than the parameter adjustment value corresponding to the light in the second wavelength band.

6. The method according to any one of claims 2 to 5, characterized in that, The first wavelength band includes 380 to 750 nanometers; The second wavelength band includes at least one of 350 to 500 nanometers, 700 to 2500 nanometers, 2500 nanometers to 1 millimeter, and 100 to 400 nanometers.

7. The method according to any one of claims 2 to 5, characterized in that The method further comprises: When the oral imaging device is started, controlling the oral imaging device to be in the first imaging mode; In response to a shooting operation, controlling the imaging module to capture an image of the subject corresponding to the first imaging mode; Controlling the oral imaging device to be in the second imaging mode; Controlling the imaging module to capture an image of the subject corresponding to the second imaging mode.

8. The method according to claim 1, characterized in that, The imaging information includes at least one of the following: The oral cavity area corresponding to the subject; The distance between the imaging module and the subject; The area of the oral cavity area corresponding to the subject; The shooting position of the imaging module in the user's oral cavity; The entrance state corresponding to the imaging module, the entrance state including an external state or an internal state.

9. The method according to claim 8, characterized in that, The oral region includes a tooth region and / or a tooth surface, and there are at least two oral regions corresponding to different target parameters; and / or, The shooting positions of the shooting module in the user's oral cavity include a tooth region and / or a tooth surface, and there are at least two shooting positions corresponding to different target parameters.

10. The method according to claim 9, wherein The tooth surface includes any one of an occlusal surface, an inner side surface, and an outer side surface; The target light-emitting parameter corresponding to the occlusal surface is less than or equal to the target light-emitting parameter corresponding to the inner side surface, and / or, the target light-emitting parameter corresponding to the occlusal surface is greater than or equal to the target light-emitting parameter corresponding to the outer side surface.

11. The method according to claim 9, wherein The oral cavity photographing device includes a main body portion and a mouth opener; the tooth surface includes an outer side surface of anterior teeth and an outer side surface of posterior teeth; When the mouth opener is connected to the main body portion, the target parameter corresponding to the outer side surface of anterior teeth is less than or equal to the target parameter corresponding to the outer side surface of posterior teeth.

12. The method according to claim 8, characterized in that, The target light-emitting parameter includes at least one of the following: the target power corresponding to the light-emitting module, the target light-emitting brightness corresponding to the light-emitting module, and the target number of lights emitting light in the light-emitting module; The target shooting parameter includes at least one of the following: the target exposure duration corresponding to the shooting module, the target exposure gain corresponding to the shooting module, the target exposure compensation corresponding to the shooting module, the target exposure expectation corresponding to the shooting module, and the target sensitivity corresponding to the shooting module; The target parameter has a positive correlation with the distance; The target parameter has a positive correlation with the area of the region.

13. The method according to claim 12, characterized in that, The positive correlation between the target parameter and the distance includes a plurality of distance intervals, the plurality of distance intervals respectively corresponding to different target parameters, and the target parameter corresponding to the first distance interval in the plurality of distance intervals is less than the target parameter corresponding to the second distance interval, and the upper limit value of the first distance interval is less than or equal to the lower limit value of the second distance interval; and / or, The positive correlation between the target parameter and the area of the region includes a plurality of area intervals, the plurality of area intervals respectively corresponding to different target parameters, and the target parameter corresponding to the first area interval in the plurality of area intervals is less than the target parameter corresponding to the second area interval, and the upper limit value of the first area interval is less than or equal to the lower limit value of the second area interval.

14. The method according to claim 8, wherein The extra-oral state and the intra-oral state respectively correspond to different target parameters.

15. The method according to claim 14, wherein The target light-emitting parameter corresponding to the intra-oral state is greater than or equal to the target light-emitting parameter corresponding to the extra-oral state.

16. The method according to claim 8, characterized in that The shooting information is determined based on the image obtained by the oral cavity photographing device.

17. The method according to claim 16, characterized in that, The shooting information determined based on the obtained image includes the tooth surface corresponding to the shooting object, and the tooth surface includes at least one of an occlusal surface, an inner side surface, and an outer side surface; and / or, The oral cavity photographing device includes a main body portion and a mouth opener, the mouth opener is detachably connected to the main body portion, and the shooting information determined based on the obtained image includes mouth opener information, and the mouth opener information includes that the mouth opener is connected to the main body portion or the mouth opener is detached from the main body portion.

18. The method according to claim 8, characterized in that, The oral photographing device includes a sensor, and the photographing information is determined by the information acquired by the sensor.

19. The method according to claim 18, characterized in that The sensor includes at least one of a distance sensor, a position sensor, and an entrance sensor; The distance sensor is used to detect the distance between the imaging module and the subject; The position sensor is used to detect the photographing position; The entrance sensor is used to detect the entrance state corresponding to the imaging module; The oral photographing device includes a main body part and a mouth opener, the mouth opener is detachably connected to the main body part, and the entrance sensor is used to detect the connection state between the mouth opener and the main body part.

20. The method according to claim 8, wherein The oral photographing device has a target structural component, and the target structural component is used to make one or more of the photographing information be preset values.

21. The method according to claim 20, wherein The target structural component includes a mouth opener, the oral photographing device further includes a main body part, and the mouth opener is detachably connected to the main body part; When the mouth opener is connected to the main body part, the entrance state corresponding to the imaging module is an out-of-mouth state, the distance between the imaging module and the subject is a first preset distance, and the area of the oral area corresponding to the subject is a first preset area; When the mouth opener is detached from the main body part, the entrance state corresponding to the imaging module is an in-mouth state.

22. The method according to claim 20, wherein The target structural component includes a positioning part, and the positioning part is connected to the imaging module; When the oral photographing device is in a target use state, the distance between the imaging module and the subject is a second preset distance, and the area of the oral area corresponding to the subject is a second preset area; Wherein, the target use state includes at least one of the following: the positioning part is in contact with the user's oral cavity, the oral area corresponding to the subject is determined, and the photographing position of the imaging module in the user's oral cavity is determined.

23. The method according to claim 1, wherein After determining the target parameters according to the photographing information, the method further includes: According to the target parameters, controlling the light emitting module to illuminate the subject, and controlling the imaging module to acquire an image of the subject; Determining the image parameters corresponding to the image; If the image parameters do not meet the first photographing condition, adjusting the target parameters according to the image parameters; According to the adjusted target parameters, controlling the light emitting module to illuminate the subject, and controlling the imaging module to re-acquire an image of the subject.

24. The method according to claim 1, wherein Before acquiring the photographing information of the oral photographing device, the method further includes: When the oral photographing device is started, controlling the light emitting module to illuminate the subject according to preset light emitting parameters; The determining the target parameters according to the photographing information includes: Determining the target photographing parameters corresponding to the imaging module according to the photographing information.

25. The method according to claim 1, wherein The target parameters include the target light emitting parameters corresponding to the light emitting module. After determining the target parameters according to the photographing information, the method further includes: Controlling the light emitting module to illuminate the subject according to the target light emitting parameters; Acquiring the light incident parameters corresponding to the imaging module; Determine the target shooting parameters corresponding to the imaging module according to the light incident parameters.

26. The method according to claim 1, characterized in that, The target parameters include the target light-emitting parameters corresponding to the light-emitting module. Determining the target parameters according to the shooting information includes: According to the shooting information, determine the first light-emitting parameter gear that matches the shooting information from a plurality of preset light-emitting parameter gears; Determine the light-emitting parameters corresponding to the first light-emitting parameter gear as the target light-emitting parameters corresponding to the light-emitting module.

27. The method according to claim 1, characterized in that, The method further includes: In response to a gear selection operation, determine the second light-emitting parameter gear selected by the user from a plurality of preset light-emitting parameter gears; Control the light-emitting module to illuminate the shooting object according to the light-emitting parameters corresponding to the second light-emitting parameter gear.

28. The method according to any one of claims 1 to 5, 8 to 27, characterized in that The imaging module includes a wide-angle camera; When the imaging module is used to shoot the occlusal surface, in the oral cavity image captured by the wide-angle camera, the proportion of the occlusal surface area is greater than the target proportion threshold; the area proportion refers to the proportion of the occlusal surface area included in the oral cavity image to the complete occlusal surface of the user's oral cavity.

29. The method according to claim 28, wherein The field of view FOV corresponding to the wide-angle camera is greater than or equal to 140°.

30. An oral photographing device, characterized in that, Including an imaging module, a light-emitting module and a controller, the controller is respectively connected to the imaging module and the light-emitting module; The controller is configured to: Obtain the shooting information of the oral cavity shooting device, and the shooting information is directly or indirectly related to the distance between the imaging module and the shooting object; Determine target parameters according to the shooting information, where the target parameters include the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module. The target light-emitting parameters are used to control the light-emitting module to illuminate the shooting object, and the target shooting parameters are used to control the imaging module to collect an image of the shooting object.

31. The oral photographing device according to claim 30, wherein, The imaging module includes a wide-angle camera.

32. The oral imaging device according to claim 30, wherein, The imaging module includes a fixed-focus camera.

33. The oral photographing device according to claim 31, characterized in that, The field of view FOV corresponding to the wide-angle camera is greater than or equal to 140°.

34. A control device for an oral photographing device, characterized in that, Applied to an oral cavity shooting device, the oral cavity shooting device includes an imaging module and a light-emitting module, and the device includes: An acquisition module, configured to acquire the shooting information of the oral cavity shooting device, and the shooting information is directly or indirectly related to the distance between the imaging module and the shooting object; A parameter determination module, configured to determine target parameters according to the shooting information, where the target parameters include the target light-emitting parameters corresponding to the light-emitting module and / or the target shooting parameters corresponding to the imaging module. The target light-emitting parameters are used to control the light-emitting module to illuminate the shooting object, and the target shooting parameters are used to control the imaging module to collect an image of the shooting object.

35. An oral photography device, characterized in that, Including a memory and a processor, and a computer program is stored in the memory. When the computer program is executed by the processor, the processor implements the method according to any one of claims 1 to 29.

36. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method according to any one of claims 1 to 29.

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