Scanning imaging method, laser scanning device, electronic device, and readable medium

Abstract

This application discloses a scanning imaging method, a laser scanning device, an electronic device, and a readable medium, belonging to the field of scanning technology. The method includes: determining a target scanning area and a designated area included within the target scanning area; while controlling a first driving module to drive a dual-axis scanning galvanometer to rotate in the fast axis direction based on a first driving signal, controlling a second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a second driving signal to scan the target scanning area and obtain a first electronic image; while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on a third driving signal, controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a fourth waveform to scan the designated area and obtain a second electronic image; superimposing the first electronic image and the second electronic image to obtain a target image, which can meet higher resolution requirements and more complex scanning requirements.

Description

Technical Field

[0001] This application relates to the field of scanning technology, and more specifically, to a scanning imaging method, a laser scanning device, an electronic device, and a readable medium. Background Technology

[0002] Laser beam scanning imaging achieves direct imaging of a laser beam through two-dimensional scanning using a scanning mirror. Compared to methods that use liquid crystal on silicon (LCOS) or digital micromirror devices (DMDs) for spatial light modulation, it offers advantages such as a simpler optical path, more compact size, and lower power consumption. However, limited by the scanning speed of the scanning mirror, laser beam scanning imaging can achieve relatively low resolution and poorer image quality. Summary of the Invention

[0003] This application proposes a scanning imaging method, a laser scanning device, an electronic device, and a readable medium to improve the above-mentioned deficiencies.

[0004] In a first aspect, this application provides a scanning imaging method applied to the processing module of a laser scanning device. The laser scanning device further includes a laser module, a dual-axis scanning galvanometer, a first driving module, and a second driving module. The first driving module is connected to both the dual-axis scanning galvanometer and the processing module, and the second driving module is connected to both the dual-axis scanning galvanometer and the processing module. The method includes: determining a target scanning area and a designated area included within the target scanning area; while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on a first driving signal, controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a second driving signal to scan the target scanning area, thereby obtaining a first electronic image; while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on a third driving signal, controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a fourth waveform to scan the designated area, thereby obtaining a second electronic image; and superimposing the first electronic image and the second electronic image to obtain a target image.

[0005] Optionally, in one possible implementation, the target scanning area includes multiple designated areas. The step of controlling the first driving module to drive the dual-axis scanning mirror to rotate in the fast axis direction based on a third driving signal, and then controlling the second driving module to drive the dual-axis scanning mirror to rotate in the slow axis direction based on a fourth waveform to scan the designated areas and obtain a second electronic image, includes: controlling the first driving module to drive the dual-axis scanning mirror to rotate in the fast axis direction based on a third driving signal corresponding to each designated area, and then controlling the second driving module to drive the dual-axis scanning mirror to rotate in the slow axis direction based on a fourth waveform corresponding to that designated area to scan each designated area and obtain a second electronic image corresponding to each designated area; the step of superimposing the first electronic image and the second electronic image to obtain a target image includes: superimposing the first electronic image and the second electronic image corresponding to each designated area to obtain a target image.

[0006] Optionally, in one possible implementation, before controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain the first electronic image, when the first driving module drives the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, the method further includes: determining a first amplitude in the fast axis direction and a second amplitude in the slow axis direction based on the actual position of the target scanning area and the actual position of the laser scanning device; determining a first frequency and a second frequency based on the target resolution of the target scanning area, the first amplitude, and the second amplitude; determining a first driving signal based on the first amplitude and the first frequency; and determining a second driving signal based on the second amplitude and the second frequency.

[0007] Optionally, in one possible implementation, after determining the second driving signal based on the second amplitude and the second frequency, the method further includes: determining a third amplitude in the fast axis direction and a fourth amplitude in the slow axis direction according to the actual position of the designated area and the actual position of the laser scanning device; modifying the amplitude of the first driving signal to the third amplitude to obtain a third driving signal; and modifying the amplitude of the second driving signal to the fourth amplitude to obtain a fourth driving signal.

[0008] Optionally, in one possible implementation, before controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a fourth waveform to scan the designated area and obtain a second electronic image, when the first driving module drives the dual-axis scanning galvanometer to rotate in the fast axis direction based on a third driving signal, the method further includes: determining a third amplitude in the fast axis direction and a fourth amplitude in the slow axis direction based on the actual position of the designated area and the actual position of the laser scanning device; determining a third frequency and a fourth frequency based on the target resolution of the designated area, the third amplitude, and the fourth amplitude; determining a third driving signal based on the third amplitude and the third frequency; and determining a fourth driving signal based on the fourth amplitude and the fourth frequency.

[0009] Optionally, in one possible implementation, the resonant frequency range of the dual-axis scanning galvanometer in the fast axis direction is 2kHz-50kHz, and the resonant frequency range of the dual-axis scanning galvanometer in the slow axis direction is 200kHz-2kHz.

[0010] Optionally, in one possible implementation, at least two of the designated regions intersect.

[0011] Secondly, this application also provides a laser scanning device, which includes: a processing module, a dual-axis scanning galvanometer, a laser module, a first driving module, and a second driving module; wherein, the laser beam emitted by the laser module illuminates the dual-axis scanning galvanometer, the first driving module is connected to both the dual-axis scanning galvanometer and the processing module, and the second driving module is connected to both the dual-axis scanning galvanometer and the processing module; the processing module is used in the scanning imaging method described in the first aspect.

[0012] Thirdly, this application also provides an electronic device, comprising: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory, the one or more application programs are configured to be executed by the one or more processors, and the one or more application programs are configured to perform the methods described above.

[0013] Fourthly, this application also provides a computer-readable medium storing processor-executable program code that, when executed by the processor, causes the processor to perform the above-described method.

[0014] This application provides a scanning imaging method applied to the processing module of a laser scanning device. The laser scanning device further includes a laser module, a dual-axis scanning galvanometer, a first driving module, and a second driving module. The first driving module is connected to both the dual-axis scanning galvanometer and the processing module, and the second driving module is also connected to both the dual-axis scanning galvanometer and the processing module. The method includes: determining a target scanning area and a designated area included within the target scanning area; while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on a first driving signal, controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a second driving signal to scan the target scanning area, thereby obtaining a first electronic image; while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on a third driving signal, controlling the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on a fourth waveform to scan the designated area, thereby obtaining a second electronic image; and superimposing the first electronic image and the second electronic image to obtain a target image.

[0015] Compared to methods that improve imaging area resolution simply by changing the driving signal, this application obtains a first electronic image by scanning the target scanning area, and a second electronic image by scanning a designated area. Scanning the target image using both the first and second electronic images improves the resolution and brightness of the designated imaging area. This application enables high-resolution imaging display of a designated area, and its scanning imaging method can meet higher resolution requirements and more complex scanning requirements.

[0016] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the optical path of the laser scanning device provided in an embodiment of this application is shown;

[0019] Figure 2A planar schematic diagram of the dual-axis scanning galvanometer provided in an embodiment of this application is shown;

[0020] Figure 3 A flowchart of a scanning imaging method provided in an embodiment of this application is shown;

[0021] Figure 4 A schematic diagram of the first driving signal and the second driving signal provided in an embodiment of this application is shown;

[0022] Figure 5 A schematic diagram of a first electronic image provided in an embodiment of this application is shown;

[0023] Figure 6 A schematic diagram of the third and fourth driving signals provided in an embodiment of this application is shown;

[0024] Figure 7 A schematic diagram of a second electronic image provided in an embodiment of this application is shown;

[0025] Figure 8 A schematic diagram of the fifth and sixth driving signals provided in an embodiment of this application is shown;

[0026] Figure 9 A schematic diagram of the target image provided in an embodiment of this application is shown;

[0027] Figure 10 A flowchart of a scanning imaging method according to another embodiment of this application is shown;

[0028] Figure 11 A flowchart of a scanning imaging method according to another embodiment of this application is shown;

[0029] Figure 12 A structural block diagram of the laser scanning device provided in an embodiment of this application is shown;

[0030] Figure 13 A structural block diagram of the electronic device provided in an embodiment of this application is shown;

[0031] Figure 14 A structural block diagram of a computer-readable storage medium provided in an embodiment of this application is shown. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. The components of the embodiments of the present application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Laser beam scanning imaging achieves direct imaging of a laser beam through two-dimensional scanning using a scanning mirror. Compared to methods that use liquid crystal on silicon (LCOS) or digital micromirror devices (DMDs) for spatial light modulation, it offers advantages such as a simpler optical path, more compact size, and lower power consumption. However, limited by the scanning speed of the scanning mirror, laser beam scanning imaging can achieve relatively low resolution and poorer image quality.

[0035] Therefore, this application provides a scanning imaging method, a laser scanning device, an electronic device, and a readable medium to solve or partially solve the above-mentioned problems.

[0036] It should be noted that the scanning imaging method of this application is applied to the processing module of a laser scanning device. The laser scanning device further includes a dual-axis scanning galvanometer, a first driving module, and a second driving module. The first driving module is connected to the dual-axis scanning galvanometer and the processing module, respectively, and the second driving module is connected to the dual-axis scanning galvanometer and the processing module, respectively.

[0037] Please see Figure 1The diagram shows the optical path of the laser scanning device. The laser beam emitted by the laser 11 is collimated by the collimating lens 12. The beam emitted from the collimating lens 12 passes through the reflecting mirror 13 and the dichroic filter 14 and is then irradiated onto the dual-axis scanning mirror 15. The dual-axis scanning mirror 15 irradiates the scanning area with the received laser beam. The dual-axis scanning mirror is rotated in the fast axis direction by the first driving module and in the slow axis direction by the second driving module to scan the scanning area. The detector of the laser scanning device acquires the electrical signal corresponding to the scanning area and obtains the image 16 of the scanning area based on the acquired electrical signal.

[0038] It should be noted that the laser module may include a single monochromatic laser or multiple monochromatic lasers. The scanning light source may be a colored light source formed by combining the three colors of an RGB three-color laser after collimation by a collimating lens, or a monochromatic light source formed by collimating a monochromatic laser after collimation by a collimating lens.

[0039] It should be noted that the dual-axis scanning galvanometer consists of scanning galvanometers that can perform scanning in two directions.

[0040] Specifically, a dual-axis scanning mirror can be composed of two one-dimensional scanning mirrors arranged orthogonally, namely a fast-axis mirror and a slow-axis mirror. The resonant frequency of the fast-axis mirror along the fast-axis scanning direction can be between 2kHz and 50kHz, and the scanning frequency operates near the resonant frequency, scanning in resonant mode. The resonant frequency of the slow-axis mirror along the slow-axis scanning direction can be between 200Hz and 2kHz, and the scanning frequency is less than half of the resonant frequency, scanning in quasi-static mode.

[0041] When the dual-axis scanning galvanometer is driven by the first driving module and the second driving module, the first driving module can control the fast-axis galvanometer to rotate in the fast-axis direction based on the driving signal, and the second driving module can control the slow-axis galvanometer to rotate in the slow-axis direction based on the driving signal. Moreover, it can drive the slow-axis galvanometer to rotate while the fast-axis galvanometer is rotating. During this process, the laser passes through the fast-axis galvanometer and the slow-axis galvanometer and then illuminates the scanning area, which can realize the grating scanning of the scanning area.

[0042] Specifically, a dual-axis scanning galvanometer can also consist of a single two-dimensional scanning mirror; please refer to [link / reference]. Figure 2 The diagram shows a schematic of a dual-axis scanning galvanometer 15. The scanning mirror 21 of the dual-axis scanning galvanometer can rotate along the slow axis while rotating along the fast axis, thereby enabling two-dimensional grating scanning.

[0043] Please see Figure 3The document illustrates a flowchart of a scanning imaging method provided in an embodiment of this application, applied to the processing module of a laser scanning device. The laser scanning device further includes a laser module, a dual-axis scanning galvanometer, a first driving module, and a second driving module. The first driving module is connected to the dual-axis scanning galvanometer and the processing module, respectively. The second driving module is connected to the dual-axis scanning galvanometer and the processing module, respectively. The method specifically includes steps S101 to S104.

[0044] Step S101: Determine the target scanning area and the designated area included within the target scanning area.

[0045] It should be noted that the target scanning area refers to the area to be scanned and imaged, while the specified area is contained within the target scanning area. The specified area and the target scanning area overlap, and the resolution of the image in the specified area differs from the resolution of the image in the non-specified area. The non-specified area refers to the target scanning area that does not overlap with the specified area.

[0046] Before performing laser scanning, the target scanning area can be obtained first, either based on preset data or data acquired in real time.

[0047] For example, if a laser scanning device is used to scan a fixed location area, the actual coordinate data of the fixed location area can be stored in the storage module of the laser scanning device, and the location data of the target scanning area can be directly obtained from the storage module.

[0048] Another example is that the laser scanning device is used to scan areas with non-fixed positions, that is, the position of the laser scan changes each time. Therefore, before performing a laser scan, it is necessary to determine the target scanning area. Specifically, the target scanning area can be determined first by an image sensor or a distance sensor, and then the target scanning area can be scanned and imaged.

[0049] Step S102: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, control the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain a first electronic image.

[0050] It should be noted that the first driving module can drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, and the second driving module can drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal. Therefore, while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, the second driving module is controlled to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area. Then, the detector acquires the electrical signal corresponding to the target scanning area, and the scanned image of the target scanning area is obtained based on the acquired electrical signal corresponding to the target scanning area, which is the first electronic image.

[0051] Specifically, after the laser beam illuminates the scanning area, part of the beam is reflected. The detector can then collect this reflected portion and convert it into an electrical signal. It's important to understand that different images or shapes of the scanning area will result in different electrical signals from the reflected beam captured by the detector. This allows for the scanning of the target area, obtaining a first electronic image. The shape of the area scanned by the laser within the target scanning area is then displayed in this first electronic image. The electronic image is composed of pixels and can be overlaid.

[0052] For an example, please refer to Figure 4 It shows waveform diagrams of the first driving signal 31 and the second driving signal 32, where the horizontal axis represents time and the vertical axis represents amplitude. The first electronic image obtained by scanning the dual-axis scanning mirror according to the first driving signal and the second driving signal is shown below. Figure 5 As shown, based on the waveforms of the first and second driving signals, it can be seen that the first and second driving signals have the same frequency. The larger the amplitude of the first driving signal, the greater the angle at which the dual-axis scanning galvanometer rotates in the slow axis direction, and the wider the area that can be scanned in the slow axis direction. The larger the amplitude of the second driving signal, the greater the angle at which the dual-axis scanning galvanometer rotates in the fast axis direction, and the wider the area that can be scanned in the fast axis direction.

[0053] According to the waveform of the first driving signal 31, under the scanning strategy of this application, the slow axis sweeps across the target scanning area at a constant speed from bottom to top within one display cycle. At this time, the fast axis scans quickly in the horizontal direction to achieve path coverage of the entire target scanning area. After that, the slow axis quickly returns from above the target scanning area to below the target scanning area to start scanning and imaging of a new frame.

[0054] Step S103: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal, control the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth waveform to scan the designated area and obtain a second electronic image.

[0055] It should be noted that the first driving module can drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal, and the second driving module can drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth driving signal. Therefore, while controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal, the second driving module is controlled to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth driving signal to scan the designated area. Then, the detector acquires the electrical signal corresponding to the target scanning area, and the scanned image of the designated area is obtained based on the acquired electrical signal corresponding to the target scan, which is the second electronic image.

[0056] For an example, please refer to Figure 6 It shows waveform diagrams of the third driving signal 33 and the fourth driving signal 34, where the horizontal axis represents time and the vertical axis represents amplitude. The second electronic image obtained by scanning the dual-axis scanning mirror according to the third and fourth driving signals is shown below. Figure 7 As shown, based on the waveforms of the third and fourth driving signals, it can be seen that the third and fourth driving signals have the same frequency. The larger the amplitude of the third driving signal, the greater the angle at which the dual-axis scanning galvanometer rotates in the slow axis direction, and the wider the area that can be scanned in the slow axis direction. Similarly, the larger the amplitude of the fourth driving signal, the greater the angle at which the dual-axis scanning galvanometer rotates in the fast axis direction, and the wider the area that can be scanned in the fast axis direction. For the specific scanning process, please refer to the aforementioned embodiment; it will not be repeated here.

[0057] according to Figures 4-7 It can be seen that when the amplitude of the driving signal corresponding to the fast axis direction is decreased or increased, the imaging range in the fast axis direction can be decreased or increased, and when the amplitude of the driving signal corresponding to the slow axis direction is changed, the imaging range in the slow axis direction can be changed.

[0058] Step S104: Superimpose the first electronic image and the second electronic image to obtain the target image.

[0059] It should be noted that after the target scanning area is determined, the detector acquires the signal corresponding to that area. Therefore, the size of the electronic image is the same for each imaging process. That is, the first and second electronic images have the same image size, but the imaging patterns in the first and second electronic images are different. Therefore, the first and second electronic images can be superimposed to obtain the target image. In other words, superimposing the first and second electronic images allows the imaging patterns in the first and second electronic images to be combined to obtain the target image, which contains a new imaging pattern.

[0060] Since the designated area has an image in both the first and second electronic images, and the image in the first and second electronic images is different, the image in the target image obtained by superimposing the first and second electronic images has a higher resolution.

[0061] Compared to methods that only improve the resolution of the imaging area by changing the driving signal, this application obtains a first electronic image by scanning the target scanning area and a second electronic image by scanning a designated area. The target image obtained by scanning the first and second electronic images can improve the resolution and brightness of the designated imaging area. On the one hand, this application can achieve high-resolution imaging display of the designated area, and its scanning imaging method can meet higher resolution requirements. On the other hand, the imaging resolution of the designated area differs from that of the non-designated area, thus meeting more complex scanning requirements.

[0062] It should be noted that this application does not limit the scanning target area or the order in which the designated area is scanned, and can be determined according to actual needs.

[0063] An exemplary embodiment, described continuing from the foregoing embodiments, involves, within one scanning cycle, firstly driving a dual-axis scanning galvanometer based on a first driving signal 31 and a second driving signal 32 to scan and image the target scanning area, obtaining a first electronic image. Then, driving the dual-axis scanning galvanometer based on a third driving signal 33 and a fourth driving signal 34 to scan and image a designated area, obtaining a second electronic image. Superimposing the first and second electronic images yields the target image. (See the target image for details.) Figure 9 As shown, a fifth drive signal can be obtained based on the first and third drive signals, and a sixth drive signal can be obtained based on the second and fourth drive signals. Please refer to [link to documentation] for the fifth and sixth drive signals. Figure 8As shown, in the target image, the resolution of the image of the specified region is higher than that of the image of the non-specified region.

[0064] This application obtains a first electronic image by scanning a target scanning area, obtains a second electronic image by scanning a specified area, and then superimposes the first and second electronic images to obtain the target image. This can increase the pixel density of a portion of the target image, thereby increasing the resolution of the specified area.

[0065] Please see Figure 10 The diagram illustrates a scanning imaging method provided in an embodiment of this application, which specifically includes steps S201 to S204.

[0066] Step S201: Determine the target scanning area and the designated area included within the target scanning area.

[0067] Step S202: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, control the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain a first electronic image.

[0068] Steps S201 and S202 have been described in detail in the foregoing embodiments and will not be repeated here.

[0069] Step S203: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal corresponding to each specified region, the second driving module is controlled to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth waveform corresponding to the specified region to scan each specified region and obtain a second electronic image corresponding to each specified region.

[0070] It should be noted that the target scanning area includes multiple designated areas, which means that multiple designated areas need to be displayed at high resolution, and the area sizes of the multiple designated areas can be different, and the display resolutions of the multiple designated areas can also be different.

[0071] Therefore, for each specified region, the dual-axis scanning galvanometer is driven to scan the specified region by the third and fourth driving signals corresponding to each specified region, and the second electronic image of the specified region can be obtained. The second electronic image of each specified region can be obtained by this method.

[0072] Step S204: Overlay the first electronic image with the second electronic image corresponding to each designated region to obtain the target image.

[0073] The target image is obtained by superimposing the first electronic image and the second electronic image corresponding to each specified region. The image pixels of the imaging area corresponding to each specified region in the target image are encrypted, which can improve the resolution or highlight the image.

[0074] Furthermore, at least two of the specified regions intersect.

[0075] It should be noted that when a certain area needs to be displayed at high resolution, multiple scans can be performed to obtain multiple electronic images, which are then superimposed. However, for some ultra-high resolution requirements, even more scans and superpositions are needed. Too many scans can lead to low scanning efficiency. In this case, the high-resolution area can be divided into overlapping areas of multiple specified areas, which can reduce the total number of scans and improve the scanning imaging accuracy without reducing scanning efficiency.

[0076] Please see Figure 11 The diagram illustrates a scanning imaging method provided in an embodiment of this application, which specifically includes steps S301 to S308.

[0077] Step S301: Determine the target scanning area and the designated area included within the target scanning area.

[0078] Step S301 has been described in detail in the foregoing embodiments and will not be repeated here.

[0079] Step S302: Determine the first amplitude in the fast axis direction and the second amplitude in the slow axis direction based on the actual position of the target scanning area and the actual position of the laser scanning device.

[0080] It should be noted that after the laser scanning device is installed, the target scanning area and the installation position of the laser scanning device can be obtained. Based on their actual positions, their relative positions can be determined. Based on their relative positions, the rotation amplitude of the dual-axis scanning galvanometer in the fast axis direction and the rotation amplitude in the slow axis direction can be determined. The first amplitude of the drive signal in the fast axis direction can be determined based on the rotation amplitude of the dual-axis scanning galvanometer in the slow axis direction, and the second amplitude of the drive signal in the slow axis direction can be determined based on the rotation amplitude of the dual-axis scanning galvanometer in the slow axis direction.

[0081] It can be seen that, with the actual position of the laser scanning device and the actual position of the target scanning area remaining unchanged, the smaller the target scanning area, the smaller the first and second amplitude values ​​obtained, and vice versa. With the target scanning area size remaining unchanged, the greater the distance between the actual position of the laser scanning device and the actual position of the target scanning area, the smaller the first and second amplitude values ​​obtained, and vice versa.

[0082] Step S303: Determine the first frequency and the second frequency based on the target resolution of the target scanning area, the first amplitude, and the second amplitude.

[0083] It should be noted that the higher the rotation frequency of the dual-axis scanning galvanometer, the higher the resolution of the image in the target scanning area. The rotation frequency and amplitude along the fast axis, as well as the rotation frequency and amplitude along the slow axis, all affect the resolution of the scanned image. The first frequency and the second frequency can be determined based on the target resolution of the target scanning area, the first amplitude, and the second amplitude. Here, the first frequency represents the frequency corresponding to the first amplitude, and the second frequency represents the frequency corresponding to the second amplitude.

[0084] Step S304: Determine the first driving signal based on the first amplitude and the first frequency.

[0085] That is, the first amplitude is used as the amplitude of the first driving signal, and the first frequency is used as the frequency of the first driving signal.

[0086] Step S305: Determine the second driving signal based on the second amplitude and the second frequency.

[0087] That is, the second amplitude is used as the amplitude of the second driving signal, and the second frequency is used as the frequency of the second driving signal.

[0088] Step S306: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, control the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain a first electronic image.

[0089] Step S307: While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal, control the second driving module to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth waveform to scan the designated area and obtain a second electronic image.

[0090] Step S308: Superimpose the first electronic image and the second electronic image to obtain the target image.

[0091] Steps S306 and S308 have been described in detail in the foregoing embodiments and will not be repeated here.

[0092] Furthermore, a third amplitude in the fast axis direction and a fourth amplitude in the slow axis direction can be determined based on the actual position of the designated area and the actual position of the laser scanning device. The amplitude of the first driving signal is modified to the third amplitude to obtain a third driving signal; the amplitude of the second driving signal is modified to the fourth amplitude to obtain a fourth driving signal.

[0093] In other words, the third driving signal obtained based on the third amplitude has the same frequency as the first driving signal, and the fourth driving signal obtained based on the fourth amplitude has the same frequency as the second driving signal. The resulting target image is as follows: Figure 9 As shown, according to Figures 4-9 As can be seen, when the amplitude of the drive signal in the slow axis direction decreases, the slow axis scanning area changes from covering the entire scanning height to only covering a specified scanning height position. Simultaneously, the amplitude of the fast axis drive signal decreases. At this point, the displayed image can be located at any position vertically and with any screen width within the complete display area. Furthermore, the displayed image is symmetrically distributed along the horizontal centerline, and its horizontal width can also be arbitrarily adjusted according to the amplitude of the fast axis drive signal. In this driving mode, the displayed image area becomes smaller, and the screen brightness increases; at the same time, the scan lines are densified, increasing the pixel density of the displayed image.

[0094] Furthermore, a third amplitude in the fast axis direction and a fourth amplitude in the slow axis direction are determined based on the actual position of the designated area and the actual position of the laser scanning device; a third frequency and a fourth frequency are determined based on the target resolution of the designated area, the third amplitude, and the fourth amplitude; a third driving signal is determined based on the third amplitude and the third frequency; and a fourth driving signal is determined based on the fourth amplitude and the fourth frequency. The principle is similar to that of obtaining the first driving signal and the second driving signal in the aforementioned embodiments, and will not be repeated here.

[0095] Please refer to Figure 12 This application also proposes a laser scanning device, the laser scanning device 600 comprising:

[0096] The system includes a processing module 611, a dual-axis scanning galvanometer 615, a laser module 612, a first drive module 613, and a second drive module 614.

[0097] The laser beam emitted by the laser module 612 illuminates the dual-axis scanning galvanometer 615. The first driving module 613 is connected to both the dual-axis scanning galvanometer 615 and the processing module 611. The second driving module 614 is connected to both the dual-axis scanning galvanometer 615 and the processing module 611.

[0098] The processor is used to execute the scanning imaging method described in the foregoing embodiments.

[0099] Please refer to Figure 13 This diagram illustrates a structural block diagram of an electronic device 700 provided in an embodiment of this application. The electronic device 700 can be an in-vehicle infotainment system, which can be installed in a vehicle. The electronic device 700 in this application may include one or more of the following components: a processor 711, a memory 712, and one or more application programs, wherein the processor 711 is electrically connected to the memory 712, and the one or more programs are configured to execute the methods described in the foregoing embodiments of the test methods.

[0100] The processor 711 may include one or more processing cores. The processor 711 connects to various parts within the electronic device 700 using various interfaces and lines, and performs various functions and processes data of the electronic device 700 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 712, and by calling data stored in the memory 712. Optionally, the processor 711 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 711 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and Modem. The CPU primarily handles the operating system, user interface, and computer programs; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 711 and may be implemented separately using a communication chip. Specifically, the methods described in the foregoing embodiments can be executed by one or more processors 711.

[0101] In some implementations, memory 712 may include random access memory (RAM) or read-only memory (ROM). Memory 712 can be used to store instructions, programs, code, code sets, or instruction sets. Memory 712 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing the various method embodiments described below, etc. The data storage area may also store data created by the electronic device 700 during use.

[0102] Please refer to Figure 14 This diagram illustrates a structural block diagram of a computer-readable medium provided in an embodiment of this application. The computer-readable medium 800 stores program code that can be called by a processor to execute the methods described in the above method embodiments.

[0103] The computer-readable medium 800 may be an electronic storage device such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable medium 800 includes a non-volatile computer-readable storage medium. The computer-readable medium 800 has storage space for program code 810 that performs any of the method steps described above. This program code can be read from or written to one or more computer program products. The program code 810 may, for example, be compressed in a suitable form.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A scanning imaging method, characterized by, A processing module for a laser scanning device, the laser scanning device further comprising a laser module, a dual-axis scanning galvanometer, a first driving module, and a second driving module, wherein the first driving module is connected to both the dual-axis scanning galvanometer and the processing module, and the second driving module is connected to both the dual-axis scanning galvanometer and the processing module, the method comprising: Determine the target scanning area and the designated area included within the target scanning area; While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the first driving signal, the second driving module is controlled to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain a first electronic image; While controlling the first driving module to drive the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal, the second driving module is controlled to drive the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth waveform to scan the designated area and obtain a second electronic image; The target image is obtained by superimposing the first electronic image and the second electronic image.

2. The method according to claim 1, characterized in that, The target scanning area includes multiple designated regions. When the first driving module drives the dual-axis scanning mirror to rotate in the fast axis direction based on a third driving signal, the second driving module drives the dual-axis scanning mirror to rotate in the slow axis direction based on a fourth waveform to scan the designated regions, obtaining a second electronic image, including: When the first driving module drives the dual-axis scanning galvanometer to rotate in the fast axis direction based on the third driving signal corresponding to each specified region, the second driving module drives the dual-axis scanning galvanometer to rotate in the slow axis direction based on the fourth waveform corresponding to the specified region to scan each specified region and obtain a second electronic image corresponding to each specified region. The step of superimposing the first electronic image and the second electronic image to obtain the target image includes: The target image is obtained by superimposing the first electronic image with the second electronic image corresponding to each designated region.

3. The method according to claim 1, characterized in that, Before controlling the second driving module to drive the dual-axis scanning mirror to rotate in the slow axis direction based on the second driving signal to scan the target scanning area and obtain the first electronic image, the method further includes: The first amplitude in the fast axis direction and the second amplitude in the slow axis direction are determined based on the actual position of the target scanning area and the actual position of the laser scanning device. The first frequency and the second frequency are determined based on the target resolution of the target scanning area, the first amplitude, and the second amplitude; The first driving signal is determined based on the first amplitude and the first frequency; The second driving signal is determined based on the second amplitude and the second frequency.

4. The method according to claim 3, characterized in that, After determining the second driving signal based on the second amplitude and the second frequency, the method further includes: The third amplitude in the fast axis direction and the fourth amplitude in the slow axis direction are determined based on the actual position of the designated area and the actual position of the laser scanning device. The amplitude of the first driving signal is modified to the third amplitude to obtain the third driving signal; The amplitude of the second driving signal is modified to the fourth amplitude to obtain the fourth driving signal.

5. The method according to claim 1, characterized in that, Before controlling the second driving module to drive the dual-axis scanning mirror to rotate in the slow axis direction based on the fourth waveform to scan the designated area and obtain the second electronic image, when the first driving module drives the dual-axis scanning mirror to rotate in the fast axis direction based on the third driving signal, the method further includes: The third amplitude in the fast axis direction and the fourth amplitude in the slow axis direction are determined based on the actual position of the designated area and the actual position of the laser scanning device. The third frequency and the fourth frequency are determined based on the target resolution of the specified area, the third amplitude, and the fourth amplitude. The third driving signal is determined based on the third amplitude and the third frequency; The fourth driving signal is determined based on the fourth amplitude and the fourth frequency.

6. The method according to claim 1, characterized in that, The resonant frequency range of the dual-axis scanning galvanometer in the fast axis direction is 2kHz-50kHz, and the resonant frequency range of the dual-axis scanning galvanometer in the slow axis direction is 200kHz-2kHz.

7. The method according to claim 2, characterized in that, At least two of the specified regions have overlap.

8. A laser scanning device, characterized in that, The laser scanning device includes: Processing module, dual-axis scanning galvanometer, laser module, first drive module and second drive module; The laser beam emitted by the laser module illuminates the dual-axis scanning galvanometer. The first driving module is connected to both the dual-axis scanning galvanometer and the processing module. The second driving module is also connected to both the dual-axis scanning galvanometer and the processing module. The processing module is used to execute the scanning imaging method according to claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains program code that can be invoked by a processor to execute the method as described in any one of claims 1-7.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the method described in any one of claims 1-7.

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