Display screen brightness acquisition method, system and device based on three-color integrating sphere light source correction

Abstract

The invention relates to the technical field of display screen detection, in particular to a display screen brightness collection method, system and device based on three-color integrating sphere light source correction, and the method comprises the steps: collecting an RGB image of an integrating sphere, and obtaining a flat field correction coefficient matrix; obtaining an actual brightness value of the RGB three-color light source provided by the integrating sphere, and obtaining a brightness calibration coefficient; acquiring an RGB image of the display screen to be detected, obtaining an actual brightness value of each pixel in the display screen to be detected by using the flat field correction coefficient matrix and the brightness calibration coefficient, and obtaining brightness distribution data of sub-pixels of the display screen to be detected according to the actual brightness value of each pixel; and performing brightness compensation on the to-be-detected display screen according to the brightness distribution data, so that the to-be-detected display screen meets the high-quality requirement of production. Through three-color light source correction, the influence of different colors on the acquired brightness data in the brightness acquisition process of the display screen can be effectively eliminated, and the accuracy of brightness extraction of the sub-pixels of the display screen is improved.

Description

Technical Field

[0001] The present invention relates to the field of display screen detection technology, and in particular to a display screen brightness acquisition method, system and device based on three-color integrating sphere light source correction. Background Art

[0002] With the rapid development of display technology, the color and brightness of display screens have become important indicators for evaluating the quality of display devices. However, in the actual production process, the inherent slight deviations of the optical system and the complex and changeable ambient lighting conditions make it difficult for the brightness and color uniformity of the display screen to reach the ideal state.

[0003] The current brightness acquisition methods are mostly limited to simple measurements relying on a single light source or simple adjustments to image correction algorithms, which are difficult to meet the requirements of high-precision display devices. Therefore, exploring more advanced and comprehensive display brightness acquisition methods to overcome the limitations of existing technologies is of great significance for improving the quality of display devices and user experience. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a display screen brightness acquisition method, system and device based on three-color integrating sphere light source correction, the method comprising the following steps:

[0005] S1: Collecting an RGB image of an integrating sphere, recorded as a first image; obtaining a flat field correction coefficient matrix based on the first image; and obtaining actual brightness values ​​of red, green and blue light sources provided by the integrating sphere, and obtaining a brightness calibration coefficient according to the actual brightness values;

[0006] S2: collecting an RGB image of the display screen to be detected, recorded as a second image, and based on the second image, using the flat field correction coefficient matrix and the brightness calibration coefficient, calculating the actual brightness value of each pixel in the display screen to be detected, and obtaining the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected;

[0007] S3: Performing brightness compensation on the display screen to be inspected according to the brightness distribution data to make it meet production quality requirements.

[0008] In one embodiment of the present invention, in S1, the method for obtaining the flat field correction coefficient matrix is ​​as follows:

[0009] Based on the first image, the image brightness matrices of the R, G, and B color channels are obtained, which are I R (x,y),I G (x,y),I B (x,y), according to I R (x,y),I G(x,y),I B (x, y), use the following formula to calculate the flat field correction coefficient matrix C for each color channel λ (x,y):

[0010]

[0011] Among them, L λ is the average brightness value of the image, I λ (x, y) is the image brightness matrix, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

[0012] In one embodiment of the present invention, in S1, the method for obtaining the brightness calibration coefficient is as follows:

[0013] The standard brightness images of the R, G, and B color channels are collected by using a camera device to obtain the response data I of the camera device. λ (x,y) and exposure time T λ , and measure the actual brightness values ​​of the integrating sphere under R, G, and B light sources, which are I ref (R), I ref (G), I ref (B), calculate the brightness calibration coefficient K λ :

[0014]

[0015] Among them, L λ is the average brightness value of the image, I λ (x, y) is the brightness matrix of the standard brightness image, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

[0016] In one embodiment of the present invention, the response data I of the camera device is obtained. λ (x,y) and exposure time T λ The method is: using the average value of the camera response data and the exposure time obtained by multiple sampling as the response data of the camera device λ (x,y) and exposure time T λ .

[0017] In one embodiment of the present invention, in S2, the method for obtaining the brightness distribution data of the sub-pixels of the display screen to be detected is as follows:

[0018] S21: correcting the grayscale value of each pixel in the second image using the flat field correction coefficient matrix to obtain a corrected grayscale value and a corrected second image;

[0019] S22: extracting the brightness value of each pixel in the corrected second image, and based on the brightness value of each pixel in the corrected second image, performing pixel brightness conversion using the brightness calibration coefficient to obtain the actual brightness value of each pixel in the display screen to be detected;

[0020] S23: Obtaining brightness distribution data of sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected.

[0021] In one embodiment of the present invention, the flat field correction coefficient matrix is ​​used to correct the gray value of each pixel in the second image to obtain a corrected gray value G λ (x,y):

[0022] G λ (x,y)=C λ (x,y)×I mes (x,y)

[0023] Among them, C λ (x, y) is the flat field correction coefficient matrix of the R, G, and B color channels, λ represents the R channel component or the G channel component or the B channel component, I mes (x, y) is the grayscale value of each pixel in the second image.

[0024] In one embodiment of the present invention, based on the brightness value of each pixel in the corrected second image, the brightness calibration coefficient is used to convert the pixel brightness to obtain the actual brightness value L of each pixel of the display screen to be detected. λ (x,y):

[0025]

[0026] Among them, K λ (x, y) is the brightness calibration coefficient of the R, G, and B color channels, λ represents the R channel component, the G channel component, or the B channel component, T λ is the exposure time used to acquire the second image, P λ (x, y) is the brightness value of each pixel in the extracted rectified second image.

[0027] Based on the same inventive concept, the present invention also provides a display screen brightness acquisition system based on three-color integrating sphere light source correction, which is used to implement the steps of the display screen brightness acquisition method based on three-color integrating sphere light source correction. The display screen brightness acquisition system based on three-color integrating sphere light source correction includes the following modules:

[0028] The correction parameter calculation module is used to collect the RGB image of the integrating sphere under the red, green and blue light sources, recorded as the first image; based on the first image, obtain the flat field correction coefficient matrix; and obtain the actual brightness values ​​of the red, green and blue light sources provided by the integrating sphere, and obtain the brightness calibration coefficient according to the actual brightness values;

[0029] A display screen brightness distribution acquisition module is used to collect an RGB image of the display screen to be detected, recorded as a second image, and based on the second image, use the flat field correction coefficient matrix and the brightness calibration coefficient to calculate the actual brightness value of each pixel in the display screen to be detected, and obtain the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected;

[0030] The display screen brightness compensation module is used to perform brightness compensation on the display screen to be tested according to the brightness distribution data so as to make it meet the production quality requirements.

[0031] The present invention also provides a display screen brightness acquisition device based on three-color integrating sphere light source correction, the device comprising the display screen brightness acquisition system, RGB three-color integrating sphere, black and white industrial camera, brightness meter and data processing and analysis equipment; wherein the display screen brightness acquisition system is stored in the data processing and analysis equipment, and the black and white industrial camera and brightness meter are respectively connected to the data processing and analysis equipment.

[0032] The present invention also provides a computer storage medium, which stores a computer software product. The computer software product includes several instructions for enabling a computer device to execute the display screen brightness acquisition method based on three-color integrating sphere light source correction.

[0033] The above technical solution of the present invention has the following advantages compared with the prior art:

[0034] First, improve color accuracy: by collecting RGB images of the integrating sphere under red, green, and blue light sources, and calculating the flat field correction coefficient matrix and brightness calibration coefficient, the accuracy of display brightness acquisition can be significantly improved. This method effectively eliminates the influence of factors such as uneven response of camera equipment, exposure time differences, and actual brightness fluctuations of the integrating sphere light source on the measurement results.

[0035] Second, high degree of automation: the entire process of brightness acquisition and correction involves multiple links, from the initial system initialization, light source calibration, to image acquisition, data processing and final brightness correction and quality judgment. These steps can all be completed by preset programs and automated equipment, reducing manual intervention and improving work efficiency.

[0036] Third, strong adaptability: In the mass production of display screens, it is often necessary to quickly, efficiently and accurately collect and test the brightness of a large number of display screen products to ensure that the product quality meets the standards. This technical solution can well adapt to the needs of such large-scale production testing due to its strong stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0038] Figure 1 It is a schematic flow chart of a display screen brightness acquisition method based on three-color integrating sphere light source correction provided in one embodiment of the present invention;

[0039] Figure 2 is a schematic flow chart of a method for obtaining brightness distribution data of sub-pixels of the display screen to be detected;

[0040] Figure 3 It is a schematic diagram of the structure of a display screen brightness acquisition system based on three-color integrating sphere light source correction provided in one embodiment of the present invention;

[0041] Figure 4 It is a schematic structural diagram of a display screen brightness acquisition device based on three-color integrating sphere light source correction provided in one embodiment of the present invention;

[0042] Figure 5 It is a structural diagram of a device for obtaining a flat field correction coefficient matrix and brightness calibration coefficients;

[0043] Figure 6 It is a structural diagram of a device for obtaining brightness distribution data of sub-pixels of a display screen to be detected;

[0044] Description of the accompanying drawings in the specification: 100, correction parameter calculation module; 200, display screen brightness distribution map acquisition module; 300, display screen brightness compensation module;

[0045] 10. RGB three-color integrating sphere; 20. Black and white industrial camera; 30. Brightness meter; 40. Data processing and analysis equipment; 50. Display screen to be tested. DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0047] Embodiment 1

[0048] See also Figure 1As shown, the present invention provides a display screen brightness acquisition method based on three-color integrating sphere light source correction, the method comprising the following steps:

[0049] S1: sequentially light up the red, green and blue light sources of the RGB integrating sphere, and use a black and white industrial camera to collect images of the R, G and B color channels corresponding to the red, green and blue light sources of the integrating sphere, respectively, recorded as the first image; based on the first image, obtain a flat field correction coefficient matrix; and obtain the actual brightness values ​​of the red, green and blue light sources provided by the integrating sphere through a brightness meter, and obtain a brightness calibration coefficient based on the actual brightness values;

[0050] S2: Switch the display screen of different color channels R, G, and B on the display screen to be detected, use a black and white industrial camera to collect images of the R, G, and B color channels of the display screen to be detected, record them as second images, and calculate the actual brightness value of each pixel in the display screen to be detected based on the second image using the flat field correction coefficient matrix and the brightness calibration coefficient, and obtain the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected;

[0051] S3: Performing brightness compensation on the display screen to be inspected according to the brightness distribution data to make it meet the high quality requirements of production.

[0052] It can be seen from the above technical solution that by collecting RGB images of the integrating sphere under red, green and blue light sources to obtain the flat field correction coefficient matrix, the image characteristics of different color channels are taken into account, and the image grayscale deviation caused by factors such as camera differences (such as inconsistent pixel response, uneven optical system, etc.) and uneven illumination can be effectively corrected. At the same time, the brightness calibration coefficient is obtained based on the actual brightness value of the three-color light source of the integrating sphere, and an accurate correspondence between the image brightness and the actual brightness is established, making the subsequent measurement of the brightness of the display screen to be tested more accurate and reducing the measurement error caused by various uncertain factors.

[0053] When processing the collected RGB images of the display screen to be tested, the flat field correction coefficient matrix and brightness calibration coefficient are used to correct the grayscale value and brightness value of each pixel respectively. This fine operation at the pixel level ensures that every detail of the display screen image can be accurately corrected, and the real brightness distribution of the display screen is restored to the greatest extent, providing a reliable data basis for accurately evaluating the quality of the display screen.

[0054] Furthermore, in step S1, a method for obtaining a flat field correction coefficient matrix based on the first image comprises the following specific steps:

[0055] Based on the first image, the image brightness matrices of the R, G, and B color channels are obtained, which are I R(x,y),I G (x,y),I B (x,y), according to I R (x,y),I G (x,y),I B (x, y), use the following formula to calculate the flat field correction coefficient matrix C for each color channel λ (x,y):

[0056]

[0057] Among them, L λ is the average brightness value of the image, I λ (x, y) is the image brightness matrix, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

[0058] Further, in step S1, the actual brightness values ​​of the red, green and blue light sources provided by the integrating sphere are obtained by a brightness meter, and the brightness calibration coefficient is obtained according to the actual brightness values ​​as follows:

[0059] The standard brightness images of the R, G, and B color channels are collected using a black and white industrial camera to obtain the response data I of the black and white industrial camera. λ (x,y) and exposure time T λ The actual brightness values ​​of the integrating sphere under the R, G, and B light sources are measured by a luminance meter, which are I ref (R), I ref (G), I ref (B), calculate the brightness calibration coefficient K λ :

[0060]

[0061] Among them, L λ is the average brightness value of the image, I λ (x, y) is the brightness matrix of the standard brightness image, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

[0062] In the above technical solution, in order to reduce the measurement error, the average value of the camera response data and exposure time obtained by multiple sampling is used as the response data I of the black and white industrial camera. λ (x,y) and exposure time T λ .

[0063] Furthermore, if Figure 2 As shown, in step S2, the method for obtaining the brightness distribution data of the sub-pixels of the display screen to be detected is as follows:

[0064] S21: Correct the grayscale value of each pixel in the second image using the flat field correction coefficient matrix to obtain a corrected second image (i.e., the R, G, B channel images of the display screen after correction) and a corrected grayscale value G λ (x,y):

[0065] G λ (x,y)=C λ (x,y)×I mes (x,y)

[0066] Among them, C λ (x, y) is the flat field correction coefficient matrix of the R, G, and B color channels, λ represents the R channel component or the G channel component or the B channel component, I mes (x, y) is the grayscale value of each pixel in the second image;

[0067] S22: Use image processing algorithm to extract the brightness value P of each pixel in the R, G, and B channel images of the rectified display screen λ (x, y), based on the brightness value of each pixel in the corrected second image, the brightness calibration coefficient is used to convert the pixel brightness to obtain the actual brightness value L of each pixel in the display screen to be detected λ (x,y):

[0068]

[0069] Among them, K λ (x, y) is the brightness calibration coefficient of the R, G, and B color channels, λ represents the R channel component, the G channel component, or the B channel component, T λ an exposure time used to acquire the second image;

[0070] S23: According to the actual brightness value L of each pixel in the display screen to be detected λ (x, y), and obtain the brightness distribution data of the sub-pixels of the display screen to be detected.

[0071] Embodiment 2

[0072] Based on the same inventive concept as that of the first embodiment, the present invention also provides a display screen brightness acquisition system based on three-color integrating sphere light source correction, which is used to implement the steps of the display screen brightness acquisition method based on three-color integrating sphere light source correction described in the first embodiment. Figure 3 As shown, the display screen brightness acquisition system based on three-color integrating sphere light source correction includes the following modules:

[0073] The correction parameter calculation module 100 is used to collect an RGB image of the integrating sphere, recorded as a first image; obtain a flat field correction coefficient matrix based on the first image; and obtain actual brightness values ​​of the red, green and blue light sources provided by the integrating sphere, and obtain a brightness calibration coefficient based on the actual brightness values;

[0074] The display screen brightness distribution acquisition module 200 is used to collect an RGB image of the display screen to be detected, recorded as a second image, and based on the second image, use the flat field correction coefficient matrix and the brightness calibration coefficient to calculate the actual brightness value of each pixel in the display screen to be detected, and obtain the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected;

[0075] The display screen brightness compensation module 300 is used to perform high-accuracy and high-precision brightness compensation on the display screen to be tested according to the brightness distribution data, so as to meet the high-quality requirements of production.

[0076] The present embodiment proposes a display screen brightness acquisition system based on three-color integrating sphere light source correction, which is used to implement the aforementioned display screen brightness acquisition method based on three-color integrating sphere light source correction. Therefore, the specific implementation method of the display screen brightness acquisition system based on three-color integrating sphere light source correction can be seen from the aforementioned embodiment part of the display screen brightness acquisition method based on three-color integrating sphere light source correction. For example, the correction parameter calculation module 100, the display screen brightness distribution acquisition module 200 and the display screen brightness compensation module 300 are respectively used to implement the steps S1, S2 and S3 of the display screen brightness acquisition method based on three-color integrating sphere light source correction in the first embodiment. Therefore, its specific implementation method can refer to the description of the corresponding embodiments of each part. In order to avoid redundancy, it will not be repeated here.

[0077] Embodiment 3

[0078] like Figure 4 As shown, the present invention also provides a display screen brightness acquisition device based on three-color integrating sphere light source correction, the device includes the display screen brightness acquisition system described in Example 2, an RGB three-color integrating sphere 10, a black and white industrial camera 20, a brightness meter 30 and a data processing and analysis device 40; wherein the display screen brightness acquisition system is stored in the data processing and analysis device, and the black and white industrial camera and the brightness meter are respectively connected to the data processing and analysis device.

[0079] like Figure 5As shown, in the process of obtaining the flat field correction coefficient matrix and the brightness calibration coefficient, the black and white industrial camera 20 is used to collect the images of the R, G, and B color channels corresponding to the RGB three-color integrating sphere 10 under the red, green, and blue light sources, respectively, and the acquired images of the R, G, and B color channels are sent to the data processing and analysis device 40. The data processing and analysis device 40 analyzes the images to obtain the image brightness matrix of the R, G, and B color channels. According to the image brightness matrices of different R, G, and B color channels, the flat field correction coefficient matrix C of each color channel is obtained. λ (x, y), the flat field correction coefficient matrix C λ The calculation method of (x, y) is consistent with that in the first embodiment.

[0080] The standard brightness images of the R, G, and B color channels are collected by the black and white industrial camera 20, and the response data and exposure time of the black and white industrial camera 20 are obtained after multiple samplings. The actual brightness value of the RGB three-color integrating sphere 10 under the R, G, and B light sources is measured by the brightness meter 30, and the actual brightness value is sent to the data processing and analysis device 40 for data processing to obtain the brightness calibration coefficient K. λ , the brightness calibration coefficient K λ The calculation method of is consistent with that in the first embodiment.

[0081] like Figure 6 As shown, the display screen 50 to be detected switches the display screens of different color channels of R, G, and B, and the black-and-white industrial camera 20 sets different exposure times according to the display screens of different color channels. The black-and-white industrial camera 20 collects the images of the three color channels of R, G, and B of the display screen 50 to be detected, and the data processing and analysis device 40 obtains the grayscale value of each pixel in the images of the three color channels of R, G, and B of the display screen 50 to be detected and corrects them to obtain the corrected R, G, and B channel images of the display screen.

[0082] The data processing and analysis device 40 uses an image processing algorithm to extract the brightness value of each pixel in the R, G, and B channel images of the corrected display screen, and based on the brightness value of each pixel in the corrected second image, uses the brightness calibration coefficient to convert the pixel brightness to obtain the actual brightness value of each pixel in the display screen 50 to be tested, outputs the brightness distribution data of the sub-pixels of the display screen 50 to be tested, and performs brightness compensation on the display screen 50 to be tested based on the brightness distribution data to meet the high quality requirements of production.

[0083] Embodiment 4

[0084] The present invention also provides a computer storage medium, which stores a computer software product. The computer software product includes several instructions for enabling a computer device to execute the display screen brightness acquisition method based on three-color integrating sphere light source correction in the first embodiment.

[0085] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0086] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0087] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0089] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A display screen brightness acquisition method based on three-color integrating sphere light source correction, characterized in that: The following steps are involved: S1: Collecting an RGB image of an integrating sphere, recorded as a first image; obtaining a flat field correction coefficient matrix based on the first image; and obtaining actual brightness values ​​of red, green and blue light sources provided by the integrating sphere, and obtaining a brightness calibration coefficient according to the actual brightness values; S2: collecting an RGB image of the display screen to be detected, recorded as a second image, and based on the second image, using the flat field correction coefficient matrix and the brightness calibration coefficient, calculating the actual brightness value of each pixel in the display screen to be detected, and obtaining the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected; S3: Performing brightness compensation on the display screen to be inspected according to the brightness distribution data to make it meet production quality requirements.

2. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 1, characterized in that: In S1, the method for obtaining the flat field correction coefficient matrix is ​​as follows: Based on the first image, the image brightness matrices of the R, G, and B color channels are obtained, which are I R (x, y), I G (x, y), I B (x, y), according to I R (x, y), I G (x, y), I B (x, y), use the following formula to calculate the flat field correction coefficient matrix C for each color channel λ (x, y): Among them, L λ is the average brightness value of the image, I λ (x, y) is the image brightness matrix, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

3. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 1, characterized in that: In S1, the method for obtaining the brightness calibration coefficient is as follows: The standard brightness images of the R, G, and B color channels are collected by using a camera device to obtain the response data I of the camera device. λ (x, y) and exposure time T λ , and measure the actual brightness values ​​of the integrating sphere under R, G, and B light sources, which are I ref (R), I ref (G), I ref (B), calculate the brightness calibration coefficient K λ : Among them, L λ is the average brightness value of the image, I λ (x, y) is the brightness matrix of the standard brightness image, λ represents the R channel component, the G channel component, or the B channel component, and w and h are the width and height of the image pixels of each channel.

4. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 3, characterized in that: Get the response data I of the camera device λ (x, y) and exposure time T λ The method is: using the average value of the camera response data and the exposure time obtained by multiple sampling as the response data of the camera device λ (x, y) and exposure time T λ .

5. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 1, characterized in that: In S2, the method for obtaining the brightness distribution data of the sub-pixels of the display screen to be detected is as follows: S21: correcting the grayscale value of each pixel in the second image using the flat field correction coefficient matrix to obtain a corrected grayscale value and a corrected second image; S22: extracting the brightness value of each pixel in the corrected second image, and based on the brightness value of each pixel in the corrected second image, performing pixel brightness conversion using the brightness calibration coefficient to obtain the actual brightness value of each pixel in the display screen to be detected; S23: Obtaining brightness distribution data of sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected.

6. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 5, characterized in that: The flat field correction coefficient matrix is ​​used to correct the gray value of each pixel in the second image to obtain the corrected gray value G λ (x, y): G λ (x,y)=C λ (x,y)×I mes (x,y) Among them, C λ (x, y) is the flat field correction coefficient matrix of the R, G, and B color channels, λ represents the R channel component, the G channel component, or the B channel component, I mes (x, y) is the grayscale value of each pixel in the second image.

7. The display screen brightness acquisition method based on three-color integrating sphere light source correction according to claim 5, characterized in that: Based on the brightness value of each pixel in the corrected second image, the brightness of the pixel is converted using the brightness calibration coefficient to obtain the actual brightness value L of each pixel of the display screen to be detected. λ (x, y): Among them, K λ (x, y) is the brightness calibration coefficient of the R, G, and B color channels, λ represents the R channel component, the G channel component, or the B channel component, T λ is the exposure time used to acquire the second image, P λ (x, y) is the brightness value of each pixel in the extracted rectified second image.

8. A display screen brightness acquisition system based on three-color integrating sphere light source correction, characterized in that: The steps for implementing the display screen brightness acquisition method based on three-color integrating sphere light source correction as described in any one of claims 1 to 7, wherein the display screen brightness acquisition system based on three-color integrating sphere light source correction comprises the following modules: The correction parameter calculation module is used to collect the RGB image of the integrating sphere under the red, green and blue light sources, recorded as the first image; based on the first image, obtain the flat field correction coefficient matrix; and obtain the actual brightness values ​​of the red, green and blue light sources provided by the integrating sphere, and obtain the brightness calibration coefficient according to the actual brightness values; A display screen brightness distribution acquisition module is used to collect an RGB image of the display screen to be detected, recorded as a second image, and based on the second image, use the flat field correction coefficient matrix and the brightness calibration coefficient to calculate the actual brightness value of each pixel in the display screen to be detected, and obtain the brightness distribution data of the sub-pixels of the display screen to be detected according to the actual brightness value of each pixel in the display screen to be detected; The display screen brightness compensation module is used to perform brightness compensation on the display screen to be tested according to the brightness distribution data so as to make it meet the production quality requirements.

9. A display screen brightness acquisition device based on three-color integrating sphere light source correction, characterized in that: It comprises the display screen brightness acquisition system as claimed in claim 8, an RGB three-color integrating sphere, a black-and-white industrial camera, a brightness meter and a data processing and analysis device; wherein the display screen brightness acquisition system is stored in the data processing and analysis device, and the black-and-white industrial camera and the brightness meter are respectively connected to the data processing and analysis device.

10. A computer storage medium, characterized in that: The computer storage medium stores a computer software product, and the computer software product includes several instructions for enabling a computer device to execute the display screen brightness acquisition method based on three-color integrating sphere light source correction as described in any one of claims 1 to 7.

Images