Image acquisition device and method

Abstract

The invention is suitable for the technical field of images, and provides an image acquisition device and method. The image acquisition device comprises a reflector and a camera, and the reflector is used for reflecting light from a target object to the camera; the camera is used for generating an image of the target object according to the reflected light. According to the image acquisition device provided by the invention, the object image can be acquired only by the reflector and the camera, and a triangular prism or a plurality of cameras are not needed, so that the cost of acquiring the object image is reduced.

Description

Technical Field

[0001] The present application belongs to the field of image technology, and in particular, relates to an image acquisition device and method. Background Art

[0002] Existing object image acquisition devices generally include the following two types: one is to reflect the light from the finger to the image sensor through a triangular prism to acquire the object image; the other is to acquire the object image through multiple groups of cameras facing different directions, and then splice the object image through three-dimensional modeling.

[0003] Among them, the first object image acquisition device requires a triangular prism, the process is relatively complicated, and therefore the cost is relatively high; the second object image acquisition device requires multiple cameras, so the cost is also relatively high. It can be seen from this that the cost of obtaining object images is relatively high. Summary of the invention

[0004] In view of this, the embodiments of the present application provide an image acquisition device and method to solve the technical problem of high cost of acquiring fingerprint images in the prior art.

[0005] In a first aspect, an embodiment of the present application provides an image acquisition device, including a reflector and a camera;

[0006] The reflector is used to reflect light from the target object to the camera;

[0007] The camera is used to generate an image of the target object according to the reflected light.

[0008] Optionally, the camera includes a visible light camera and an infrared light camera;

[0009] The visible light camera is used to generate a visible light image of the target object according to the visible light in the reflected light;

[0010] The infrared camera is used to generate an infrared image of the target object according to the infrared light in the reflected light.

[0011] Optionally, it also includes a control mainboard connected to the camera;

[0012] The control main board is used to identify whether the target object is a finger according to the infrared light image.

[0013] Optionally, it also includes a distance sensor connected to the control mainboard;

[0014] The distance sensor is used to detect the distance between the target object and the image acquisition device.

[0015] Optionally, the distance sensor is a high-resolution distance and high-speed sensor.

[0016] Optionally, a fill light board is also included, and the reflector, the camera, the distance sensor and the control main board are all installed on the fill light board.

[0017] Optionally, a light source is provided on the fill light panel.

[0018] Optionally, the light source adopts multiple sets of side-lighting technology to provide uniform light.

[0019] Optionally, the light source includes a visible light source and an infrared light source.

[0020] Optionally, the visible light camera is a binocular vision visible light high-resolution high-speed camera, and the infrared light camera is a binocular vision infrared light high-resolution high-speed camera.

[0021] In a second aspect, an embodiment of the present application provides an image acquisition method, comprising:

[0022] The light from the target object is reflected to the camera through the reflector;

[0023] An image of the target object is generated according to the reflected light by a camera.

[0024] Optionally, the camera includes a visible light camera and an infrared light camera;

[0025] The step of generating an image of the target object according to the reflected light by a camera includes:

[0026] generating a visible light image of the target object according to the visible light in the reflected light by means of the visible light camera;

[0027] The infrared camera generates an infrared image of the target object according to the infrared light in the reflected light.

[0028] Optionally, also include:

[0029] According to the infrared light image, it is identified whether the target object is a finger.

[0030] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the image acquisition method as described in any one of the second aspects above are implemented.

[0031] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the image acquisition method as described in any one of the second aspects above are implemented.

[0032] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a server, enables the server to execute each step of the image acquisition method as described in any one of the second aspects above.

[0033] The image acquisition device and method provided by the embodiments of the present application have the following beneficial effects:

[0034] The embodiment of the present application provides an image acquisition device, which includes a reflector and a camera, wherein the reflector is used to reflect light from the target object to the camera; and the camera is used to generate an image of the target object according to the reflected light. The image acquisition device provided by the present application only needs a reflector and a camera to complete the acquisition of the object image, without the need to set up a triangular prism or multiple cameras, thereby reducing the cost of acquiring the object image. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A schematic diagram of the structure of an image acquisition device in the prior art provided in an embodiment of the present application;

[0037] Figure 2 A schematic structural diagram of an image acquisition device provided in an embodiment of the present application;

[0038] Figure 3 A schematic structural diagram of another image acquisition device provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of a flow chart of an image acquisition method provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] It should be noted that the terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two, and "at least one", "one or more" refers to one, two or more. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, it is defined that the "first" and "second" features can explicitly or implicitly include one or more of the features.

[0042] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0043] The embodiment of the present application first provides an image acquisition device, which can acquire an image of a target object. Preferably, the target object can be a finger, based on which, the image acquisition device can acquire a fingerprint image.

[0044] Specifically, when the user needs to obtain a fingerprint image, the user can place the finger at a preset position around the image acquisition device, so that the light can be reflected into the reflector, and the light from the finger is reflected to the camera through the reflector, and then the camera generates a fingerprint image corresponding to the finger based on the reflected light.

[0045] At present, the existing fingerprint image acquisition devices generally include the following two types. The first type uses a triangular prism to reflect light from the finger to the image acquisition device, thereby acquiring the fingerprint image. Figure 1 , Figure 1 A schematic diagram of the structure of an image acquisition device in the prior art provided in an embodiment of the present application.

[0046] like Figure 1 As shown, the image acquisition device in the prior art may include a light source 101 , a triangular prism 103 , a glass panel 130 , and an image sensor 105 .

[0047] The finger is pressed on the glass panel 130, and the light source 101 emits light to the triangular prism 103. The end 102 of the triangular prism 103 can be coated with a black layer to allow the light from the finger to be better radiated to the image sensor 105. The image sensor 105 can convert the received light signal into an electrical signal, thereby enabling the acquisition of the fingerprint image.

[0048] It can be seen that Figure 1 The provided image acquisition device requires a triangular prism 103, and the process is relatively complicated, so the cost is relatively high.

[0049] The second existing fingerprint image acquisition device acquires fingerprint images through multiple groups of cameras facing different directions, and then splices the fingerprint image through three-dimensional modeling.

[0050] It can be seen that the second conventional fingerprint image acquisition device mentioned above needs to be equipped with multiple cameras, so the cost is also relatively high.

[0051] See also Figure 2 , Figure 2 A schematic structural diagram of an image acquisition device provided in an embodiment of the present application, such as Figure 2 As shown, the image acquisition device 2 may include a reflector 21 and a camera 22 .

[0052] The reflector 21 may be used to reflect light from the target object 23 to the camera 22 .

[0053] The camera 22 may be used to generate an image of the target object 23 based on the reflected light.

[0054] In practical applications, the target object 23 may include a finger.

[0055] Based on this, the user can place the finger at a preset position to reflect the light to the reflector 21. The reflector 21 can reflect the light from the finger to the camera 22. The camera 22 can obtain the light reflected by the reflector 21 and generate a fingerprint image corresponding to the finger based on the light reflected by the reflector 21.

[0056] In practical applications, as an example rather than a limitation, the preset position may be the position where the target object 23 needs to be placed when an image of the target object 23 needs to be acquired. The specific setting method of the preset position may be set according to actual needs, and the preset position is not specifically limited here.

[0057] It can be seen from the above that the embodiment of the present application provides an image acquisition device, which includes a reflector and a camera, wherein the reflector is used to reflect light from the target object to the camera; the camera is used to generate an image of the target object according to the reflected light. The image acquisition device provided by the present application only needs a reflector and a camera to complete the acquisition of the fingerprint image, without the need to set up a triangular prism or multiple cameras, thereby reducing the cost of acquiring the fingerprint image.

[0058] In addition, since the image acquisition device provided in the embodiment of the present application uses a reflector 21 to reflect light, generally speaking, the thickness of the reflector is smaller than that of the triangular prism. Therefore, compared with the existing image acquisition device using a triangular prism (such as Figure 1 The image acquisition device provided in the embodiment of the present application is thinner, so the volume of the image acquisition device can be reduced, which makes it more convenient for users to carry and use the image acquisition device.

[0059] See also Figure 3 , Figure 3 A schematic structural diagram of another image acquisition device provided in an embodiment of the present application, such as Figure 3 As shown, the image acquisition device 3 may include a reflector 21 , a visible light camera 221 , an infrared light camera 222 , a control mainboard 24 , a distance sensor 25 , a fill light panel 26 and a light source 27 .

[0060] The camera 22 may include a visible light camera 221 and an infrared light camera 222;

[0061] The control mainboard 24 can be connected to the camera 22. Specifically, the control mainboard 24 can be connected to the visible light camera 221 and the infrared light camera 222 respectively.

[0062] The distance sensor 25 can be connected to the control main board 24;

[0063] The reflector 21, the visible light camera 221, the infrared light camera 222, the control main board 24, and the distance sensor 25 can all be installed on the fill light board 26;

[0064] The fill light panel 26 may be provided with a light source 27 .

[0065] Specifically, the visible light camera 221 can be used to obtain visible light in the reflected light, and after obtaining the visible light in the light, generate a visible light image of the target object 23 according to the visible light in the obtained light. After generating the visible light image of the target object 23, the visible light camera 221 can send the visible light image of the target object 23 to the control main board 24.

[0066] Specifically, the infrared camera 222 can be used to obtain infrared light in the reflected light, and after obtaining the infrared light in the light, generate an infrared light image of the target object 23 based on the infrared light in the obtained light. After generating the infrared light image of the target object 23, the infrared camera 222 can send the infrared light image of the target object 23 to the control main board 24.

[0067] Since the infrared light image corresponding to a finger and the infrared light image corresponding to a non-finger object are different, after receiving the infrared light image of the target object 23, the control main board 24 can identify whether the target object 23 is a finger based on the infrared light image of the target object 23, thereby realizing the anti-counterfeiting function and further improving the security of the image acquisition device 3.

[0068] Specifically, the control mainboard 24 may include a pre-trained recognition model, and the recognition model may be trained to recognize whether the target object 23 is a finger based on the infrared light image of the target object 23. Based on this, after receiving the infrared light image of the target object 23, the control mainboard 24 may input the infrared light image of the target object 23 into the trained recognition model, and recognize whether the target object 23 is a finger based on the infrared light image of the target object 23 through the trained recognition model.

[0069] If the control main board 24 recognizes that the target object 23 is not a finger, a preset measure may be taken. For example, the preset measure may be issuing an alarm or notifying a preset person.

[0070] If the control mainboard 24 recognizes that the target object 23 is a finger, the control mainboard 24 may send the received visible light image of the target object 23 to a preset device, so that the preset device acquires the image of the user's finger.

[0071] The image of the target object that needs to be acquired in the image acquisition device 3 can be a visible light image of the target object 23 generated by the visible light camera 221, and the infrared light image of the target object 23 generated by the infrared light camera 222 can be used to identify whether the target object 23 is a finger, thereby realizing the anti-counterfeiting function and further improving the security of the image acquisition device 3.

[0072] In a possible implementation, the visible light camera 221 may be a binocular vision visible light high-resolution high-speed camera.

[0073] In a possible implementation, the infrared camera 222 may be a binocular vision infrared high-resolution high-speed camera.

[0074] The binocular vision visible light high-resolution high-speed camera and the binocular vision infrared light high-resolution high-speed camera have higher resolution and acquisition frequency, so the image acquired by the image acquisition device 3 provided in the embodiment of the present application has better quality.

[0075] Specifically, the distance sensor 25 can be used to detect the distance between the target object 23 and the image acquisition device 3. After detecting the distance between the target object 23 and the image acquisition device 3, the distance sensor 25 can send the detected distance between the target object 23 and the image acquisition device 3 to the control mainboard 24.

[0076] The control motherboard 24 can also be used to receive the distance between the target object 23 and the image acquisition device 3 sent by the distance sensor 25, and after receiving the distance between the target object 23 and the image acquisition device 3, determine whether the target object 23 appears at the preset position according to the distance between the target object 23 and the image acquisition device 3.

[0077] If the control mainboard 24 determines that the target object 23 has appeared at the preset position, the control mainboard 24 can control the visible light camera 221 , the infrared light camera 222 and the light source 27 to start.

[0078] It can be seen from the above that by controlling the visible light camera 221 , the infrared light camera 222 and the light source 27 to start after the control mainboard 24 determines that the target object 23 has appeared at the preset position, the power consumed by the image acquisition device 3 can be saved.

[0079] In a possible implementation, the distance sensor 25 may be a high-resolution and high-speed distance sensor.

[0080] The high-resolution and high-speed distance sensor has higher resolution and acquisition frequency, so the image acquisition device 3 provided in the embodiment of the present application is more sensitive.

[0081] The light source 27 adopts multiple sets of side-lighting technology. Specifically, the fill light plate 26 includes multiple light sources 27. Each light source 27 emits light from the side of the fill light plate 26 toward the inside of the fill light plate 26. The light source 27 can provide uniform light for the image acquisition device 3 through the above-mentioned light-emitting method.

[0082] Relative to Figure 1 The corresponding existing image acquisition device (such as Figure 1 The corresponding image acquisition device) uses a light providing method in which a light source is directly irradiated to the target object. The light providing method in the image acquisition device 3 can provide more uniform light, thereby making the fingerprint image acquired by the image acquisition device 3 have better quality.

[0083] Specifically, the light source 27 may include a visible light source and an infrared light source.

[0084] A visible light source may be used to provide visible light.

[0085] An infrared light source may be used to provide infrared light.

[0086] The following combination Figure 3 , the specific working principle of the image acquisition device provided in the embodiment of the present application is described in detail.

[0087] When the user's fingerprint needs to be collected, the user can place the target object 23 (such as a finger) at a preset position.

[0088] The distance sensor 25 acquires the distance between the target object 23 and the image acquisition device 3 at a preset frequency. After the distance sensor 25 detects the distance between the target object 23 and the image acquisition device 3 , the distance between the target object 23 and the image acquisition device 3 is sent to the control mainboard 24 .

[0089] After the control motherboard 24 receives the distance between the target object 23 and the image acquisition device 3, it can determine whether the target object 23 appears at the preset position based on the distance between the target object 23 and the image acquisition device 3. If the control motherboard 24 determines that the target object 23 has appeared at the preset position, the control motherboard 24 can control the visible light camera 221, the infrared light camera 222 and the light source 27 to start.

[0090] The light source 27 may include a visible light source and an infrared light source, and thus may provide visible light rays and infrared light rays.

[0091] After the visible light and the infrared light are irradiated to the target object 23 , a portion of the visible light and the infrared light will be reflected to the reflector 21 .

[0092] The reflector 21 may be used to reflect light from the target object 23 to the visible light camera 221 and the infrared light camera 222 .

[0093] The visible light camera 221 can receive the visible light reflected by the reflector 21 ; the infrared light camera 222 can receive the infrared light reflected by the reflector 21 .

[0094] After receiving the visible light reflected by the reflector 21 , the visible light camera 221 can generate a visible light image of the target object 23 according to the reflected visible light, and send the visible light image of the target object 23 to the control mainboard 24 .

[0095] After receiving the infrared light reflected by the reflector 21 , the infrared camera 222 can generate an infrared light image of the target object 23 according to the reflected infrared light, and send the infrared light image of the target object 23 to the control mainboard 24 .

[0096] After the control mainboard 24 receives the infrared light image of the target object 23 sent by the infrared light camera 222, the infrared light image of the target object 23 can be input into the trained recognition model, and the trained recognition model can identify whether the target object 23 is a finger based on the infrared light image of the target object 23.

[0097] After receiving the visible light image of the target object 23 sent by the visible light camera 221, the control mainboard 24 can process the visible light image of the target object 23 through a preset algorithm. Specifically, the control mainboard 24 can fuse and select the multiple received visible light images of the target object 23 to obtain the target visible light image, and then perform preset processing on the target visible light image to enhance the image effect of the target visible light image and improve the contrast of the target visible light image.

[0098] If the control mainboard 24 recognizes that the target object 23 is not a finger, a preset measure may be taken, such as sounding an alarm or notifying a preset person.

[0099] If the control mainboard 24 recognizes that the target object 23 is a finger, the control mainboard 24 may send the received visible light image of the target object 23 to a preset device, so that the preset device acquires the image of the user's finger.

[0100] Based on the image acquisition device provided in the above embodiment, the embodiment of the present application continues to provide an image acquisition method.

[0101] See also Figure 4 , Figure 4 The flowchart of an image acquisition method provided in an embodiment of the present application is shown in FIG. The execution subject of the image acquisition method provided in an embodiment of the present application may be an electronic device. Specifically, the electronic device may include an image acquisition device, such as Figure 4 As shown, the image acquisition method provided in the embodiment of the present application may include S401 to S402, which are described in detail as follows:

[0102] In S401 , light from the target object is reflected to the camera through a reflector.

[0103] In the embodiment of the present application, when the user needs to obtain a fingerprint image, the light from the target object can be reflected to the camera through a reflector.

[0104] The number of the reflector may be one.

[0105] The target object can be a finger or a non-finger object.

[0106] In S402, an image of the target object is generated by a camera according to the reflected light.

[0107] In the embodiment of the present application, the camera may receive the light reflected by the reflector, and after receiving the light reflected by the reflector, an image of the target object may be generated according to the reflected light.

[0108] In a possible implementation, the camera may include a visible light camera and an infrared light camera, and S402 may include steps a to b. The details are as follows:

[0109] In step a, a visible light camera is used to generate a visible light image of the target object according to the visible light in the reflected light.

[0110] In this implementation, a visible light camera may be used to generate a visible light image of the target object based on the visible light in the reflected light.

[0111] In step b, an infrared light image of the target object is generated by an infrared light camera according to the infrared light in the reflected light.

[0112] In this implementation, an infrared light image of the target object may be generated by an infrared light camera based on the infrared light in the reflected light.

[0113] In this implementation, after the visible light camera generates a visible light image of the target object, it can send the visible light image of the target object to the control mainboard of the image acquisition device; after the infrared light camera generates an infrared light image of the target object, it can send the infrared light image of the target object to the control mainboard of the image acquisition device.

[0114] In a possible implementation, the image acquisition method provided in the embodiment of the present application may further include step c, which is described in detail as follows:

[0115] In step c, whether the target object is a finger is identified based on the infrared light image.

[0116] In this implementation, after the infrared camera generates an infrared image of the target object, the control mainboard of the image acquisition device can identify whether the target object is a finger based on the infrared image.

[0117] In this implementation, if the control mainboard recognizes that the target object is not a finger, preset measures can be taken, such as sounding an alarm or notifying a preset person.

[0118] If the control mainboard recognizes that the target object is a finger, the control mainboard may send the received visible light image of the target object to a preset device, so that the preset device acquires the image of the user's finger.

[0119] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown, the electronic device 5 provided in this embodiment may include: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. For example, a program corresponding to the image acquisition method. When the processor 50 executes the computer program 52, the steps applied to the image acquisition method embodiment are implemented, for example Figure 4 S401~S402 shown.

[0120] Exemplarily, the computer program 52 may be divided into one or more modules / units, one or more modules / units are stored in the memory 51, and are executed by the processor 50 to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 52 in the electronic device 5.

[0121] Those skilled in the art will understand that Figure 5 The electronic device 5 is merely an example and does not limit the electronic device 5 , and may include more or less components than those shown in the figure, or may combine certain components, or may include different components.

[0122] The processor 50 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0123] The memory 51 may be an internal storage unit of the electronic device 5, such as a hard disk or memory of the electronic device 5. The memory 51 may also be an external storage device of the electronic device 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, or a flash card, etc., equipped on the electronic device 5. Further, the memory 51 may also include both an internal storage unit of the electronic device 5 and an external storage device. The memory 51 is used to store computer programs and other programs and data required by the electronic device. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0124] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional units as needed, that is, the internal structure of the image acquisition device can be divided into different functional units to complete all or part of the functions described above. The functional units in the embodiment can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0125] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0126] An embodiment of the present application provides a computer program product. When the computer program product is executed on a terminal device, the terminal device implements the steps in the above-mentioned various method embodiments.

[0127] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0128] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0129] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An image acquisition device, characterized in that: Includes reflector and camera; The reflector is used to reflect light from the target object to the camera; The camera is used to generate an image of the target object according to the reflected light.

2. The image acquisition device according to claim 1, characterized in that: The camera includes a visible light camera and an infrared light camera; The visible light camera is used to generate a visible light image of the target object according to the visible light in the reflected light; The infrared camera is used to generate an infrared image of the target object according to the infrared light in the reflected light.

3. The image acquisition device according to claim 2, characterized in that: Also included is a control mainboard connected to the camera; The control main board is used to identify whether the target object is a finger according to the infrared light image.

4. The image acquisition device according to claim 3, characterized in that: Also includes a distance sensor connected to the control mainboard; The distance sensor is used to detect the distance between the target object and the image acquisition device.

5. The image acquisition device according to claim 4, characterized in that: It also includes a fill light board, and the reflector, the camera, the distance sensor and the control main board are all installed on the fill light board.

6. The image acquisition device according to claim 5, characterized in that: The fill light panel is provided with a light source, and the light source adopts a multi-group side-lighting technology to provide uniform light.

7. The image acquisition device according to claim 6, characterized in that: The light source includes a visible light source and an infrared light source.

8. An image acquisition method, characterized in that: include: The light from the target object is reflected to the camera through the reflector; An image of the target object is generated according to the reflected light by a camera.

9. The method according to claim 8, characterized in that The camera includes a visible light camera and an infrared light camera; The step of generating an image of the target object according to the reflected light by a camera includes: generating a visible light image of the target object according to the visible light in the reflected light by means of the visible light camera; The infrared camera generates an infrared image of the target object according to the infrared light in the reflected light.

10. The method according to claim 9, characterized in that Also includes: According to the infrared light image, it is identified whether the target object is a finger.

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