Image acquisition method, device, system and storage medium

Abstract

The disclosed embodiments provide an image acquisition method, device, system and storage medium, which relate to the field of image acquisition technology. The method includes: controlling a display unit to display a preset picture; controlling an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for display unit measurement or display unit correction; wherein the display unit starts lighting up to display the preset picture later than the imaging device starts capturing; and the display unit ends lighting up to display the preset picture earlier than the imaging device ends capturing. By adopting this technical solution, it is possible to shorten the image acquisition time while capturing a relatively clear display unit image, thereby improving the efficiency of subsequent image processing.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of image acquisition technology, and in particular, to an image acquisition method, device, system and storage medium. Background Art

[0002] At present, due to the luminous characteristics of LED display screens, the screen-on process of LED display screens is that the level signal lights up the lights row by row or column by column. In the process of camera collecting LED display screen images, when the camera exposure time is not an integer multiple of a subfield, there is a high probability that scanning patterns will be collected.

[0003] In order to solve this problem, it is necessary to limit the minimum number of repetitions of the subfield. Taking a 60Hz LED display as an example, it takes 16ms to display one frame, so at least 6 frames must be collected to solve the scanning pattern problem. Therefore, in the image acquisition and correction system, in order to be able to collect a clearer LED screen image, it is necessary to increase the camera exposure time.

[0004] However, when the LED display screen displays a low-gray image or the screen brightness of the LED display screen is low, increasing the exposure time of the camera will cause the entire image acquisition time to become longer, which in turn causes the subsequent image processing process to take longer.

[0005] Therefore, there is an urgent need for an image acquisition method that can shorten the image acquisition time while acquiring a relatively clear display unit image, thereby improving the efficiency of subsequent image processing. Summary of the invention

[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiments of the present disclosure provide an image acquisition method, device, system and storage medium.

[0007] A first aspect of an embodiment of the present disclosure provides an image acquisition method, the method comprising:

[0008] Controlling the display unit to display a preset picture;

[0009] Controlling an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for measuring the display unit or calibrating the display unit;

[0010] The display unit starts lighting up the preset picture later than the imaging device starts capturing the image; and the display unit stops lighting up the preset picture earlier than the imaging device stops capturing the image.

[0011] A second aspect of an embodiment of the present disclosure provides an image acquisition device, the device comprising:

[0012] A first control unit, used to control the display unit to display a preset picture;

[0013] A second control unit is used to control an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for measuring the display unit or calibrating the display unit;

[0014] The display unit starts lighting up the preset picture later than the imaging device starts capturing the image; and the display unit stops lighting up the preset picture earlier than the imaging device stops capturing the image.

[0015] A third aspect of an embodiment of the present disclosure provides a control device, which is used to execute the method described in the first aspect.

[0016] A fourth aspect of the embodiments of the present disclosure provides an imaging device, which is used to execute the method described in the first aspect.

[0017] The fifth aspect of the embodiments of the present disclosure provides an image acquisition system, which includes: a control device, an imaging device and a display unit; the control device is electrically connected to the imaging device; the control device is electrically connected to the display unit; the control device is used to execute the method described in the first aspect.

[0018] A sixth aspect of an embodiment of the present disclosure provides an image acquisition system, the system comprising: an imaging device and a display unit; the imaging device is electrically connected to the display unit; the imaging device is used to execute the method described in the first aspect.

[0019] A seventh aspect of an embodiment of the present disclosure provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method of the first aspect described above can be implemented.

[0020] The disclosed embodiment provides an image acquisition method, device, system and storage medium, the method comprising: controlling a display unit to display a preset picture; controlling an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for measurement of the display unit or correction of the display unit; wherein the lighting start time of the display unit displaying the preset picture is later than the acquisition start time of the imaging device; and the lighting end time of the display unit displaying the preset picture is earlier than the acquisition end time of the imaging device. By adopting this technical solution, it is possible to shorten the image acquisition time while acquiring a relatively clear display unit image, thereby improving the efficiency of subsequent image processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 is a flowchart of an image acquisition method provided by an embodiment of the present disclosure;

[0024] Figure 2a A timing diagram of image acquisition is shown;

[0025] Figure 2b A schematic diagram of the timing of image acquisition in the prior art is shown;

[0026] Figure 3 is a flowchart of an image acquisition method provided by an embodiment of the present disclosure;

[0027] Figure 4a is a flowchart of an image acquisition method provided by an embodiment of the present disclosure;

[0028] Figure 4b is a schematic diagram of a preset exposure time provided by an embodiment of the present disclosure;

[0029] Figure 5 is a structural schematic diagram of an image acquisition device provided by an embodiment of the present disclosure;

[0030] Figure 6 is a structural schematic diagram of an image acquisition system provided by an embodiment of the present disclosure;

[0031] Figure 7 It is a structural schematic diagram of an image acquisition system provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] Figure 1 : is a flowchart of an image acquisition method provided by an embodiment of the present disclosure, the image acquisition method comprising:

[0035] S101, controlling the display unit to display a preset picture.

[0036] In one example, the preset screen is a screen pre-configured in the control device. The control device is electrically connected to the display unit, and the control device controls the display unit to display the preset screen. The display unit can be: a display light board, a display module, a box, or a display screen composed of multiple boxes.

[0037] S102, controlling the imaging device of the imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes the light point information of the display unit, and the light point information is used for display unit measurement or display unit correction; wherein the display unit lights up and displays the preset picture starting time later than the imaging device capture start time; the display unit lights up and displays the preset picture ending time earlier than the imaging device capture end time.

[0038] In one example, step S102 can be performed synchronously with step S101. In one example, the imaging screen includes a preset screen. For a clearer description, the start time of lighting up the display unit to display the preset screen is recorded as A, the start time of collecting the imaging device is recorded as B, the end time of lighting up the display unit to display the preset screen is recorded as C, and the end time of collecting the imaging device is recorded as D.

[0039] For details, see Figure 2a A timing diagram of image acquisition is shown. It can be seen from the figure that A is later than B, and C is earlier than D. Figure 2b FIG. 1 is a schematic diagram showing a timing sequence of image acquisition in the prior art. Figure 2bIt can be seen that Z is the time when the screen-on command is sent, and the time when the screen-on command is sent is the time when the control device sends the command, and Z is before B. Since there is a link between the control device and the display unit, there is a time difference between Z and A, and A is between Z and B. Then AB is the original screen-on interval time, and BD is the original exposure time. Figure 2a and Figure 2b It can be seen that the timing between A and B is different, and the timing between C and D is different.

[0040] In one example, the image acquisition method can be applied to the scenario of correcting the light point information of the display unit. Specifically, correction is a technology used to improve the brightness uniformity and color fidelity of the display unit. It collects the brightness (and chromaticity) data of each pixel (or each primary color sub-pixel) area on the display unit to obtain the correction coefficient of each primary color sub-pixel or the correction coefficient matrix of each pixel. The control device uses the correction coefficient matrix to achieve differential driving of each pixel (or each primary color sub-pixel) to obtain a correction result, thereby improving the brightness uniformity and color fidelity of the display unit.

[0041] In one example, the image acquisition method can also be applied to the scene of screen evaluation of the light point information of the display unit. For example: static image clarity test: use a clarity test card (such as SD-01, SD-02) to observe the details in the display unit, such as bushes, eyebrows, eyes, hair, etc., and score according to the clarity. Motion image clarity test: select a dynamic clarity test video (such as MD-01~MD-02), observe whether the license plate of a car driving at high speed and the face of an athlete running are clear and recognizable, and whether there is a tailing phenomenon, and score. Large area color restoration test: use a color test card (such as RC-01, RC-02) to observe whether the skin color, blue sky, white clouds, green grass, red flag and other colors of the display screen are realistic, whether there is a color cast phenomenon, and score. Image uniformity test: evaluate and score by observing the number of brightness levels of the display screen, and use the grayscale expression 1 (brightness identification level) score table for scoring. Grayscale expression test: Display the "full moon" video test file (such as MOON-01), observe whether there is a pseudo contour phenomenon around the image under low ambient brightness, and rate and score according to the severity of the pseudo contour phenomenon. Retrace line or stroboscopic phenomenon test: Observe whether the display unit has retrace lines or stroboscopic phenomena, and rate them. Brightness and contrast test: Use a photometer to test brightness, and a colorimeter or image analysis software can be used to evaluate the contrast test, requiring the display unit to maintain a certain contrast at different brightness. Refresh rate and response time test: Use professional testing instruments to test refresh rate and response time, generally requiring the refresh rate to be above 60Hz and the response time to be within a few milliseconds. Color accuracy and uniformity test: Use a color analyzer to perform color testing, requiring the display to accurately restore the color of the image. Uniformity testing can be performed through visual inspection or image analysis software, requiring the brightness and color differences between each pixel to be controlled within a certain range.

[0042] In one example, the image acquisition method can also be applied to the scenario of screen measurement of the light point information of the display unit. Screen measurement of the light point information of the display unit mainly includes the following parts: Display unit display defect detection: extract brightness information of the unit image, draw a light point diagram, and calculate according to the least squares method to separate surface defects. Display screen light point positioning method: including the steps of searching for the first and last light points, obtaining the actual coordinates of the starting light point and the actual coordinates of the last light point in the light point array; the step of obtaining the light point spacing, obtaining at least one of the row light point spacing between adjacent light points in the row direction of the light point array and the column light point spacing between adjacent light points in the column direction; the step of calculating the reference coordinates, at the position of the actual coordinates of the adjacent light points in the row direction or the column direction of the light point, move the light point spacing in the row direction or the column direction to obtain the reference coordinates of the next light point; the step of obtaining the actual coordinates, in the light point image, with the reference coordinates of the light point as the center, find the high brightness value pixel point among all the pixel points within the preset distance range, and set the coordinates of the high brightness value pixel point as the actual coordinates. Image processing and light point positioning and sorting: Binarize the image and calculate the center coordinates of all light points; use the extreme value method and two-way sorting method to complete the pre-positioning of the four corner light points in the image; then use the linear classification sorting method to locate and sort the boundary points to complete the positioning and sorting of all light points on the display. Light point center coordinate extraction: Before determining the specific position of the light point, the grayscale distribution statistics of the collected image must be performed. In the acquired photosensitive image, since the light points are generally arranged in a matrix, and there is a significant difference in the grayscale values ​​between the light point area and the background area, sometimes there will be a phenomenon of surround light. Therefore, the image needs to be binarized. First, convert the captured image into a grayscale image, and extract the average grayscale value of some pixels in the non-image point area in the grayscale image. Then, take the average grayscale value of the double non-image point area as the threshold, assign the grayscale value of the pixel less than the threshold to 0 in the grayscale image, and assign the grayscale value of the pixel greater than the threshold to 1. Since the grayscale value of the pixel at the light point position is high, the points above the threshold are densely distributed and the distribution shape is close to a circle, so the center of the area with a grayscale value above the threshold and a high density is taken as the light point coordinate to complete the extraction of the light point center coordinate.

[0043] The disclosed embodiment provides an image acquisition method, which includes: controlling a display unit to display a preset picture; controlling an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes the light point information of the display unit, and the light point information is used for display unit measurement or display unit correction; wherein the lighting start time of the display unit displaying the preset picture is later than the acquisition start time of the imaging device; and the lighting end time of the display unit displaying the preset picture is earlier than the acquisition end time of the imaging device. By adopting this technical solution, while acquiring a relatively clear display unit image, the image acquisition time can be shortened, thereby improving the efficiency of subsequent image processing.

[0044] Figure 3 : is a flowchart of an image acquisition method provided by an embodiment of the present disclosure, the image acquisition method comprising:

[0045] S301, controlling the display unit to display a pure color preset picture.

[0046] In one example, the pure color preset picture may be a red preset picture, a green preset picture, and a blue preset picture.

[0047] S302, controlling the imaging device of the imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes the light point information of the display unit, and the light point information is used for display unit measurement or display unit correction; wherein the display unit displays the preset picture when the lighting start time is later than the imaging device when the acquisition starts; and the display unit displays the preset picture when the lighting end time is earlier than the imaging device when the acquisition ends.

[0048] In one example, the duration for which the display unit displays the preset picture is shorter than the acquisition duration of the imaging device.

[0049] In one example, the display unit starts lighting up to display the preset picture at A, the imaging device starts collecting at B, the display unit ends lighting up to display the preset picture at C, and the imaging device ends collecting at D. The duration of the display unit displaying the preset picture is the duration from A to C, i.e., duration AC, and the imaging device collects the duration from B to D, i.e., duration BD, and duration AC is less than duration BD.

[0050] The disclosed embodiment provides an image acquisition method, the method comprising: controlling a display unit to display a pure color preset picture. With this technical solution, by selecting a pure color primary color picture, since the pure color primary color picture can constitute any preset picture, the pure color primary color picture is corrected or measured by the display unit, which is equivalent to correcting or measuring any preset picture, thereby improving the accuracy when measuring or correcting the display unit.

[0051] Figure 4a : is a flowchart of an image acquisition method provided by an embodiment of the present disclosure, the image acquisition method comprising:

[0052] S401, sending a framing command to a display unit, controlling the display unit to display a preset solid color picture with a preset number of frames according to the framing command; wherein the framing command carries the number of preset frames.

[0053] In one example, a framing command is sent from a control device or an imaging device to a display unit. The framing command is used to instruct the display unit to display a preset number of frames of a solid color preset screen according to the framing command. Specifically, the framing command includes the color of the preset screen and the number of preset frames. The number of preset frames is pre-set. It is worth noting that different solid color preset screens have different corresponding numbers of preset frames, that is, the number of preset frames included in the framing command is different. The color of the solid color preset screen and the corresponding number of preset frames are related to the model of the control device, the model of the display unit, the network environment, etc. For example, when the solid color preset screen is red, the number of preset frames is 20 frames; when the solid color preset screen is green, the number of preset frames is 10 frames; when the solid color preset screen is blue, the number of preset frames is 15 frames.

[0054] In one example, controlling the display unit to display a preset number of frames of a preset solid color picture according to a frame command includes:

[0055] The display unit is controlled to display a preset number of pure color preset pictures frame by frame according to the frame command.

[0056] In one example, the display unit displays a preset pure color picture frame by frame according to the frame command until all preset frames are displayed. When the user observes the display unit, he can see the change of the display unit on and off, that is, after displaying a frame of the preset pure color picture, another frame of the preset pure color picture is displayed.

[0057] In one example, before controlling the display unit to display a preset picture, the method further includes:

[0058] Controlling the display unit to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state;

[0059] and / or,

[0060] After controlling the display unit to display the preset picture, the method further includes:

[0061] The display unit is controlled to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state.

[0062] In one example, before the display unit is controlled to display a preset picture, the display unit is in a black screen state, and after the display unit is controlled to display the preset picture, the display unit can be one of a black screen state, a power-off state, and a black image display state. Before the display unit is controlled to display the preset picture, the display unit is in a power-off state, and after the display unit is controlled to display the preset picture, the display unit can be one of a black screen state, a power-off state, and a black image display state. Before the display unit is controlled to display the preset picture, the display unit is in a black image display state, and after the display unit is controlled to display the preset picture, the display unit can be one of a black screen state, a power-off state, and a black image display state. The advantage of such a setting is that since the display unit is in a preset state before displaying the preset picture and after displaying the preset picture, the display unit can control the amount of light entering the imaging device by displaying the preset picture by the display unit.

[0063] S402: Send an exposure start command to an imaging device of an imaging device, control the imaging device of the imaging device to open a shutter according to the exposure start command, shoot a display unit, and obtain an imaging picture corresponding to a preset picture.

[0064] In one example, the imaging picture includes light point information of the display unit, and the light point information is used for display unit measurement or display unit calibration;

[0065] The display unit starts lighting up to display the preset picture later than the imaging device starts collecting data; and the display unit ends lighting up to display the preset picture earlier than the imaging device ends collecting data.

[0066] In one example, the start exposure command is used to instruct an imaging device of an imaging apparatus to start shooting.

[0067] In one example, the duration between the acquisition start time of the imaging device and the acquisition end time of the imaging device is the preset exposure time; the preset exposure time is greater than the screen time.

[0068] In one example, the exposure start command includes a preset exposure time. For example, if the preset exposure time is 20 seconds, the time between the acquisition start time of the imaging device and the acquisition end time of the imaging device is 20 seconds.

[0069] In one example, the preset exposure time may be a duration BD.

[0070] In one example, the duration between the start time of lighting up the display unit to display the preset picture and the end time of lighting up the display unit to display the preset picture is the screen time; wherein the screen time is determined by the number of preset frames and the duration of displaying a frame of pure color preset picture. Figure 4bA schematic diagram of a preset exposure time is shown. As can be seen from the figure, the duration K is the first screen interval time, and the first screen interval time is the link delay time of the image acquisition system. The duration AC is the duration of displaying the preset picture. The duration L is the second screen interval time, which is used to characterize the preset redundant duration. The advantage of this setting is to ensure that the imaging device of the imaging device can completely capture the preset number of frames of pure color preset pictures.

[0071] In one example, the screen-on time is a duration of AC, the number of preset frames is N, and the duration of displaying a frame of pure color preset picture is M, then AC=N×M. Since the screen-on time is a multiple of the duration of displaying a frame of pure color preset picture, the imaging device captures the entire frame during the screen-on time, and the imaging device will not capture the scanning pattern caused by the incomplete frame of the display unit. In the related art, the screen-on time is not set, and the imaging device may capture the scanning pattern caused by the display unit displaying an incomplete frame. In order to solve this problem, the related art adopts a method of making the preset exposure time of the imaging device at least a multiple of the duration of displaying a frame of pure color preset picture. Taking a 60Hz display unit as an example, it takes 16ms to screen one frame, and at least 6 frames must be collected to solve the scanning pattern problem. Therefore, no matter how bright the screen is, the minimum preset exposure time for collection is 100ms. This results in the preset exposure time being limited, and thus also limits the use of the aperture of the imaging device. In this embodiment, the use of the screen-on time can remove the restriction on the use of the aperture.

[0072] S403: Analyze and process the image according to a preset algorithm to obtain a processing result.

[0073] In one example, the preset algorithm may be a picture quality assessment algorithm. After the control device obtains the imaging picture, the imaging picture is analyzed and processed to determine whether the image quality of the imaging picture collected by the imaging device can be used for subsequent display unit measurement or display unit calibration, thereby avoiding inaccurate display unit measurement or display unit calibration caused by picture quality problems during the shooting process.

[0074] S404. Determine whether to generate an indication for adjusting parameter information according to the processing result, so as to control the imaging device of the imaging device to adjust the parameter information according to the indication of the adjustment parameter information, and obtain adjusted parameter information; wherein the parameter information is a preset exposure time, micro focus and aperture.

[0075] In one example, determining whether to generate an indication of adjusting parameter information according to the processing result includes:

[0076] If the processing result does not meet the first preset condition, determining an instruction to generate adjustment parameter information;

[0077] If the processing result meets the first preset condition, it is determined that an instruction to adjust the parameter information is not generated.

[0078] In one example, the first preset condition is that the peak value ratio of the light points meets the second preset condition and the proportion of the light points meets the third preset condition.

[0079] In one example, the peak ratio of the light point is used to characterize the ratio of the maximum brightness of each pixel in the display unit to its average brightness. This parameter is very important for the brightness uniformity and display effect of the display unit. The second preset condition is that the peak ratio of the light point is between 40-60. The light point ratio is used to characterize the ratio of each pixel (light point) in the display unit relative to the area of ​​the entire display unit. This ratio affects the resolution and display effect of the display unit. The light point ratio meets the third preset condition that the light point ratio is between 30-70.

[0080] In one example, if the lamp point peak ratio is between 40-60 and the lamp point ratio is between 30-70, it is determined that the processing result meets the first preset condition, and the image quality of the imaging picture captured by the imaging device can be used for subsequent display unit measurement or display unit calibration. Therefore, there is no need to generate an indication of adjustment parameter information.

[0081] In one example, if the processing result does not meet the first preset condition, including the following situations: the peak ratio of the light point is not between 40-60; the proportion of the light points is not between 30-70; the peak ratio of the light point is not between 40-60 and the proportion of the light points is not between 30-70. At this time, the image quality of the imaging picture collected by the imaging device cannot be used for subsequent display unit measurement or display unit calibration, so it is necessary to generate an indication of the adjustment parameter information.

[0082] S405: If it is determined to generate an instruction to adjust the parameter information, the imaging device of the imaging device is controlled to re-shoot the display unit according to the adjusted parameter information to obtain an updated imaging picture corresponding to the preset picture.

[0083] In one example, since the image quality of the imaged picture collected by the imaging device cannot be used for subsequent display unit measurement or display unit calibration, it is necessary to control the imaging device to re-shoot the display unit according to the adjusted parameter information to obtain an updated imaged picture corresponding to the preset picture. Then, step S403 and step S404 are performed on the updated imaged picture until the updated imaged picture can be used for subsequent display unit measurement or display unit calibration.

[0084] Specifically, if the light point peak ratio is not between 40-60, the preset exposure time and the preset number of frames can be readjusted, and then it is determined whether the preset exposure time is within the preset value range. If so, the imaging device is controlled to re-shoot the display unit according to the preset exposure time and the preset number of frames to obtain an updated imaging picture corresponding to the preset picture. Then, step S403 and step S404 are performed on the updated imaging picture until the updated imaging picture can be used as a subsequent display unit measurement or display unit calibration. If the preset exposure time is not within the preset value range, the aperture can be adjusted to obtain the aperture parameters, and then the imaging device is controlled to re-shoot the display unit according to the aperture parameters to obtain an updated imaging picture corresponding to the preset picture. Then, step S403 and step S404 are performed on the updated imaging picture until the updated imaging picture can be used as a subsequent display unit measurement or display unit calibration.

[0085] Specifically, if the light point ratio is not between 30-70, the micro focus of the imaging device of the imaging device is adjusted to obtain the micro focus parameter, and then the imaging device of the imaging device is controlled to re-shoot the display unit according to the micro focus parameter to obtain an updated imaging picture corresponding to the preset picture. Then, step S403 and step S404 are performed on the updated imaging picture until the updated imaging picture can be used as a subsequent display unit measurement or display unit calibration.

[0086] In one example, the imaging device can not only capture images but also perform other preset operations during the preset exposure time.

[0087] The disclosed embodiment provides an image acquisition method, which includes: sending a framing command to a display unit, controlling the display unit to display a preset number of frames of a preset pure color preset picture according to the framing command, sending an exposure start command to an imaging device, controlling the imaging device to open a shutter according to the exposure start command, photographing the display unit, and obtaining an imaging picture corresponding to the preset picture. The imaging picture is analyzed and processed according to a preset algorithm to obtain a processing result. By adopting the present technical solution, by displaying a preset number of frames, it is possible to avoid the situation where the imaging device photographs scanning patterns on the display unit caused by incomplete frames, and the use restrictions of the aperture are lifted.

[0088] Figure 5 is a schematic diagram of the structure of an image acquisition device provided by an embodiment of the present disclosure, the image acquisition device 50 comprises:

[0089] The first control unit 501 is used to control the display unit to display a preset picture.

[0090] The second control unit 502 is used to control the imaging device of the imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes the light point information of the display unit, and the light point information is used for display unit measurement or display unit correction; wherein the display unit displays the preset picture. The lighting start time is later than the acquisition start time of the imaging device; the display unit displays the preset picture. The lighting end time is earlier than the acquisition end time of the imaging device.

[0091] In one example, the first control unit 501 is used to control the display unit to display a pure color preset picture.

[0092] In one example, the duration for which the display unit displays the preset picture is shorter than the acquisition duration of the imaging device.

[0093] In one example, the first control unit 501 is used to send a framing command to the display unit, and control the display unit to display a preset solid color preset picture with a preset number of frames according to the framing command; wherein the framing command carries the number of preset frames.

[0094] In an example, the first control unit 501 is specifically configured to control the display unit to display a preset number of pure color preset pictures frame by frame according to a frame punching command.

[0095] In one example, before controlling the display unit to display a preset picture, the device 50 further includes:

[0096] A third control unit 503, used to control the display unit to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state;

[0097] and / or,

[0098] After controlling the display unit to display the preset picture, the device 50 further includes:

[0099] The fourth control unit 504 is used to control the display unit to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state.

[0100] In one example, the second control unit 502 is used to send an exposure start command to an imaging device of an imaging device, control the imaging device of the imaging device to open a shutter according to the exposure start command, shoot the display unit, and obtain an imaging picture corresponding to a preset picture.

[0101] In one example, the duration between the start time when the display unit displays a preset picture and the end time when the display unit displays the preset picture is the screen time; wherein the screen time is determined by the number of preset frames and the duration of displaying a frame of pure color preset picture.

[0102] In one example, the duration between the acquisition start time of the imaging device and the acquisition end time of the imaging device is the preset exposure time; the preset exposure time is greater than the screen time.

[0103] In one example, the apparatus 50 further includes:

[0104] The processing unit 505 is used to analyze and process the image according to a preset algorithm to obtain a processing result;

[0105] The generating unit 506 is used to determine whether to generate an indication of adjusting parameter information according to the processing result, so as to control the imaging device of the imaging device to adjust the parameter information according to the indication of the adjusting parameter information to obtain the adjusted parameter information; wherein the parameter information is a preset exposure time, micro focus and aperture.

[0106] In one example, the generating unit 506 is used to

[0107] If the processing result does not meet the first preset condition, determining an instruction to generate adjustment parameter information;

[0108] If the processing result meets the first preset condition, it is determined that an instruction to adjust the parameter information is not generated.

[0109] In one example, the first preset condition is that the peak value ratio of the light points meets the second preset condition and the proportion of the light points meets the third preset condition.

[0110] In one example, the apparatus 50 further includes:

[0111] The fifth control unit 507 is used to control the imaging device of the imaging device to re-shoot the display unit according to the adjusted parameter information if it is determined to generate an instruction to adjust the parameter information, so as to obtain an updated imaging picture corresponding to the preset picture.

[0112] The device provided in this embodiment can execute the method of any of the above embodiments, and its execution method and beneficial effects are similar, which will not be repeated here.

[0113] Figure 6 It is a structural diagram of an image acquisition system provided by an embodiment of the present disclosure, and the system 10 includes: a control device 101, an imaging device 102 and a display unit 103; the control device 101 is electrically connected to the imaging device 102; the control device 101 is electrically connected to the display unit 103; the control device 101 is used to execute the method as in the embodiment.

[0114] Figure 7It is a structural diagram of an image acquisition system provided by an embodiment of the present disclosure, the system 20 comprises: an imaging device 102 and a display unit 103; the imaging device 102 is electrically connected to the display unit 103; the imaging device 102 is used to execute the method in the embodiment.

[0115] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0116] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0117] The computer-readable medium may be included in the control device, or may exist independently without being assembled into the control device.

[0118] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0119] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0120] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

[0121] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0122] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0123] The embodiments of the present disclosure also provide a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method of any of the above embodiments can be implemented. The execution method and beneficial effects are similar and will not be repeated here.

[0124] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0125] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An image acquisition method, characterized in that: The method comprises: Controlling the display unit to display a preset picture; Controlling an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for measuring the display unit or calibrating the display unit; The start time of lighting up the preset picture by the display unit is later than the start time of acquisition by the imaging device; and the end time of lighting up the preset picture by the display unit is earlier than the end time of acquisition by the imaging device.

2. The method according to claim 1, characterized in that The controlling display unit displays a preset picture, comprising: The display unit is controlled to display a pure color preset picture.

3. The method according to claim 1, characterized in that: include: The duration for which the display unit displays the preset picture is shorter than the acquisition duration of the imaging device.

4. The method according to claim 2, characterized in that: Controlling the display unit to display a pure color preset picture includes: Send a framing command to the display unit, and control the display unit to display a preset solid color preset picture with a preset number of frames according to the framing command; wherein the framing command carries the number of the preset number of frames.

5. The method according to claim 4, characterized in that The controlling the display unit to display a preset number of frames of a preset solid color preset picture according to the framing command comprises: The display unit is controlled to display a preset number of pure color preset pictures frame by frame according to the frame command.

6. The method according to claim 1, characterized in that Before the control display unit displays a preset picture, the method further includes: Controlling the display unit to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state; and / or, After the control display unit displays a preset picture, the method further includes: The display unit is controlled to be in a preset state; wherein the preset state includes one of a black screen state, a power-off state, and a black image display state.

7. The method according to claim 1, characterized in that The controlling the imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture includes: An exposure start command is sent to the imaging device of the imaging device, and the imaging device of the imaging device is controlled to open a shutter according to the exposure start command, so as to shoot the display unit and obtain an imaging picture corresponding to the preset picture.

8. The method according to claim 4, characterized in that The duration between the start time when the display unit lights up to display the preset picture and the end time when the display unit lights up to display the preset picture is the screen time; wherein, the screen time is determined by the number of preset frames and the duration of displaying one frame of the pure color preset picture.

9. The method according to claim 8, characterized in that The duration between the acquisition start time of the imaging device and the acquisition end time of the imaging device is a preset exposure time; the preset exposure time is greater than the screen-on time.

10. The method according to claim 1, characterized in that The method further comprises: Analyzing and processing the imaging picture according to a preset algorithm to obtain a processing result; According to the processing result, determine whether to generate an indication of adjusting the parameter information, so as to control the imaging device of the imaging device to adjust the parameter information according to the indication of the adjustment parameter information, and obtain the adjusted parameter information; wherein the parameter information is a preset exposure time, micro focus and aperture.

11. The method according to claim 10, characterized in that The step of determining whether to generate an indication of adjusting parameter information according to the processing result includes: If the processing result does not meet the first preset condition, determining an instruction to generate the adjustment parameter information; If the processing result meets the first preset condition, it is determined that an indication of not generating the adjustment parameter information is not generated.

12. The method according to claim 11, characterized in that The first preset condition is that the peak value ratio of the lamp points meets the second preset condition and the proportion of the lamp points meets the third preset condition.

13. The method according to claim 10, characterized in that The method further comprises: If it is determined to generate the instruction for adjusting the parameter information, the imaging device of the imaging device is controlled to re-shoot the display unit according to the adjusted parameter information to obtain an updated imaging picture corresponding to the preset picture.

14. An image acquisition device, characterized in that: The device comprises: A first control unit, used to control the display unit to display a preset picture; A second control unit is used to control an imaging device of an imaging device to shoot the display unit to obtain an imaging picture corresponding to the preset picture; wherein the imaging picture includes light point information of the display unit, and the light point information is used for measuring the display unit or calibrating the display unit; The start time of lighting up the preset picture by the display unit is later than the start time of acquisition by the imaging device; and the end time of lighting up the preset picture by the display unit is earlier than the end time of acquisition by the imaging device.

15. A control device, characterized in that: The control device is used to execute the method according to any one of claims 1 to 13.

16. An imaging device, characterized in that: The imaging device is used to perform the method according to any one of claims 1-13.

17. An image acquisition system, characterized in that: The system comprises: a control device, an imaging device and a display unit; the control device is electrically connected to the imaging device; the control device is electrically connected to the display unit; the control device is used to execute the method as described in any one of claims 1-13.

18. An image acquisition system, characterized in that: The system comprises: an imaging device and a display unit; the imaging device is electrically connected to the display unit; and the imaging device is used to execute the method according to any one of claims 1 to 13.

19. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 13 is implemented.

Images