WO2018094823A1

WO2018094823A1 - Uniformity test method and system for display screen

Info

Publication number: WO2018094823A1
Application number: PCT/CN2016/113063
Authority: WO
Inventors: 王甜甜
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2016-11-23
Filing date: 2016-12-29
Publication date: 2018-05-31
Also published as: CN106441820B; CN106441820A

Abstract

A uniformity test method and system for a display screen. The test method comprises: acquiring a display state image of a display screen under test, determining the display state image as an initial image, and filtering the initial image to generate a filtered image (S10); generating, according to pixel value differences between pixels of the initial image and pixels of the filtered image, a comparison image characterizing interference pixel values of the initial image (S20); and generating, according to pixel value differences between the pixels of the initial image and pixels of the comparison image, a uniformity distribution image of the initial image (S30). The present invention enables a uniformity distribution condition of a display screen to be reflected by a test result.

Description

Display uniformity test method and system

Technical field

The invention relates to the technical field of display screen testing, in particular to a display uniformity test method and a display uniformity test system.

Background technique

The display screen is often used as a display component of a display device such as a television or a computer, and the brightness uniformity of the display screen reflects the uniformity of the display screen. If the display is even, the image display is better, and vice versa, the display is poor.

In the prior art, the nine-point test method is generally used to detect the uniformity of the display screen, that is, nine sample points or modules are randomly selected on the display screen for brightness test, because the selection of the sample points or modules is random, and the sample points are selected. The number is limited, so the test results can only reflect the sample values on the display or the pixel values of the module, or the average of the pixel values of all samples or modules.

The disadvantage of the above technical solution is that the test result does not reflect the uniformity distribution of the display screen.

Summary of the invention

The main object of the present invention is to provide a test method for uniformity of a display screen, which aims to reflect the uniformity distribution of the display screen through the test results.

To achieve the above object, the method for testing display uniformity provided by the present invention comprises the following steps:

Obtaining a display state image of the display screen to be tested, determining the display state image as an initial image, and performing filtering processing on the initial image to generate a filtered image;

Generating a contrast image for characterizing the interfering pixel value of the initial image according to a difference in pixel values of the initial image and each pixel on the filtered image;

A uniformity distribution image of the initial image is generated according to a difference in pixel values of the initial image and each pixel on the comparison image.

Preferably, the obtaining a display state image of the display screen to be tested, determining the display state image as an initial image, and performing filtering processing on the initial image to generate a filtered image includes:

Obtaining a display state image of the display to be tested;

Performing a down sampling process on the display state image to generate a downsampled image;

Determining the downsampled image as the initial image;

The initial image is subjected to filtering processing to generate a filtered image.

Preferably, the filtering processing the initial image to generate a filtered image comprises:

Obtaining a preset image filtering template, where the size of the image filtering template is greater than a preset value;

And performing filtering convolution processing on the initial image to generate the filtered image according to the image filtering template.

Preferably, the generating, according to the difference between the initial image and the pixel value of each pixel on the filtered image, generating a contrast image for characterizing the interfering pixel value of the initial image, comprising:

Obtaining a pixel value of each pixel on the initial image, and acquiring a pixel value of each pixel on the filtered image;

Calculating each pixel point on the initial image and a corresponding pixel point on the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image Difference in pixel value;

Calculating a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And generating the contrast image for characterizing the interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.

Preferably, after the generating the uniformity distribution image of the initial image according to the pixel value difference between the initial image and each pixel on the comparison image, the method further includes:

Obtaining a position and a pixel value of each pixel on the uniformity distribution image, and generating uniformity of the initial image according to a size of the uniformity distribution image and a pixel value of each pixel on the uniformity distribution image. Sexual distribution simulation image.

In addition, in order to achieve the above object, the present invention further provides a display uniformity testing system, including:

a processing module, configured to acquire a display state image of the display screen to be tested, determine the display state image as an initial image, and perform filtering processing on the initial image to generate a filtered image;

a comparison image generating module, configured to: according to the initial image and each image on the filtered image a difference in pixel values of the prime points, generating a contrast image for characterizing the interfering pixel values of the initial image;

And a uniformity image generating module, configured to generate a uniformity distribution image of the initial image according to a difference in pixel values of the initial pixels and respective pixel points on the contrast image.

Preferably, the processing module comprises:

a first acquiring unit, configured to acquire a display state image of the display screen to be tested;

a downsampling unit, configured to perform a downsampling process on the display state image to generate a downsampled image;

a determining unit, configured to determine the downsampled image as the initial image;

And a filtering unit, configured to perform filtering processing on the initial image to generate a filtered image.

Preferably, the filtering unit comprises:

Obtaining a sub-unit, configured to acquire a preset image filtering template, where the size of the image filtering template is greater than a preset value;

And a filtering subunit, configured to perform a filter convolution process on the display state image according to the image filtering template to generate the filtered image.

Preferably, the comparison image generation module comprises:

a second acquiring unit, configured to acquire a pixel value of each pixel on the initial image, and acquire a pixel value of each pixel on the filtered image;

a difference value calculation unit, configured to calculate, according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image, each pixel point on the initial image and the a difference in pixel values of corresponding pixels on the filtered image;

a mean value calculation unit, configured to calculate a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And a contrast image generating unit, configured to generate the contrast image for characterizing an interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.

Preferably, the display uniformity testing system further comprises:

And a simulation module, configured to acquire a position and a pixel value of each pixel on the uniformity distribution image, and generate a location according to the size of the uniformity distribution image and the pixel value of each pixel on the uniformity distribution image. A uniformity distribution simulation image of the initial image.

In the technical solution of the present invention, the comparison image is generated according to a difference in pixel values of each pixel point on the initial image and the filtered image, and a pixel value of each pixel on the comparison image is used for Characterizing the pixel value interference value of the corresponding pixel on the initial image, and therefore, the uniformity distribution image generated according to the difference between the initial image and the pixel value of each pixel on the comparison image excludes all pixels The pixel value distribution image after the pixel value is interfered, according to the uniformity distribution image, the uniformity distribution of the display area corresponding to the initial image on the display screen to be tested can be known.

DRAWINGS

1 is a schematic flow chart of a first embodiment of a method for testing display uniformity according to the present invention;

2 is a display state image of a display uniformity test method of the present invention;

3 is a comparative image of a display uniformity test method of the present invention;

4 is a schematic flow chart of a second embodiment of a method for testing display uniformity according to the present invention;

5 is a downsampled image of the display state image shown in FIG. 3 after downsampling processing;

6 is a schematic flow chart of a third embodiment of a method for testing display uniformity according to the present invention;

7 is an image filtering template of a display uniformity testing method according to the present invention;

8 is a schematic flow chart of a fourth embodiment of a method for testing display uniformity according to the present invention;

9 is a schematic flow chart of a fifth embodiment of a method for testing uniformity of a display screen according to the present invention;

10 is a display screen with good uniformity in the method for testing display uniformity of the present invention;

Figure 11 is a uniformity distribution image corresponding to the display having good uniformity shown in Figure 10;

12 is a uniformity distribution simulation image corresponding to the uniformity distribution image shown in FIG. 11;

13 is a display screen with poor uniformity in a display uniformity test method according to the present invention;

14 is a simulation image of uniformity distribution corresponding to the display screen with poor uniformity shown in FIG. 13;

Figure 15 is a flip-flop diagram of the uniformity distribution simulation image shown in Figure 14;

16 is a schematic diagram of functional modules of a first embodiment of a display uniformity testing system according to the present invention;

17 is a schematic diagram of functional modules of a second embodiment of a display uniformity testing system according to the present invention;

18 is a schematic diagram of functional modules of a third embodiment of a display uniformity testing system according to the present invention;

19 is a schematic diagram of functional modules of a fourth embodiment of a display uniformity testing system according to the present invention;

20 is a schematic diagram of functional modules of a fifth embodiment of a display uniformity testing system of the present invention.

The object, features, and advantages of the invention will be further described in conjunction with the embodiments.

detailed description

The specific embodiments described herein are to be construed as illustrative only and not limiting.

The invention provides a method for testing display uniformity.

Referring to FIG. 1 to FIG. 3, in order to achieve the above object, a first embodiment of the present invention provides a method for testing uniformity of a display screen, including the following steps:

Step S10: Obtain a display state image of the display screen to be tested, determine the display state image as an initial image, and perform filtering processing on the initial image to generate a filtered image;

Step S20, generating a contrast image for characterizing the interfering pixel value of the initial image according to the difference between the initial image and the pixel value of each pixel on the filtered image;

Step S30, generating a uniformity distribution image of the initial image according to a difference in pixel values between the initial image and each pixel on the comparison image.

The display state image may include all display areas of the display screen, and may also include a partial display area of the display screen. When the display state image includes all display areas of the display screen, the finally obtained uniformity distribution image corresponds to the The uniformity distribution of all display areas of the display screen, when the display state includes only a part of the display area of the display screen, the finally obtained uniformity distribution image corresponds to the uniformity distribution of the partial display area of the display screen.

The display state image is obtained by high-definition camera shooting. In order to comprehensively analyze the uniformity of the display to be tested, the display state image should include all display areas of the display screen. In order to obtain the display state image having high brightness, when performing display state image capturing, The display to be tested can be in the display state of the full white field signal. Of course, the display state image is not limited to being acquired under the full white field signal.

In the embodiment, the display state image is acquired by a camera having a resolution of 2120×3800.

The initial image is an image for performing filtering processing and subsequent calculation, and may be the display state image itself, or may be a downsampled image obtained by downsampling the display state image, and the down sampling processing is used for Reduce the number of pixels to reduce the amount of calculations for the entire filtering and calculation process.

The filtering process is for removing noise of the initial image, where the noise is image noise caused by jitter or sudden darkening of the light during the acquisition of the display state image, and the filtering process may use an averaging filter or Gaussian filter. Since the filtered image is obtained by filtering processing from the initial image, the size of the filtered image is the same as the size of the initial image.

The comparison image is a difference image constructed from pixel values of respective pixels of the initial image and the filtered image. Since the filtered image is an image that removes noise interference factors, a difference in pixel values between the initial image and each pixel of the filtered image may represent an interfering pixel value of each pixel on the initial image, the interference The pixel value can be pixel value interference caused by noise, or it can be mura pattern.

The uniformity distribution image is an image that can be used to represent the uniformity of the display screen to be tested after the interference pixel value is excluded. According to the uniformity distribution image, a uniformity distribution image of the initial image can be obtained. The uniformity distribution result of the initial image is the same as the display state image, and therefore, according to the uniformity distribution image, a uniformity distribution image of the display region corresponding to the display state image can be obtained.

Referring to FIG. 4 to FIG. 5, in the second embodiment of the display uniformity testing method of the present invention, the step S10 includes:

Step S11, obtaining a display state image of the display screen to be tested;

Step S12, performing a down sampling process on the display state image to generate a downsampled image;

Step S13, determining the downsampled image as the initial image;

Step S14, performing filtering processing on the initial image to generate a filtered image.

Performing downsampling processing on the display state image to reduce image pixel points and reduce calculation the amount.

Specifically, in the down sampling processing method, the number of sampling points in the calculation is determined by the down sampling parameter. The downsampling parameter is used to represent the number of pixels spaced between two sample points.

The downsampling parameter is an arbitrary integer greater than 1. The larger the value of the downsampling parameter, the larger the interval between the two sampled points picked up. Therefore, the fewer the number of selected sampling points, the lower the calculation amount. .

In the present embodiment, the downsampled image D_img is generated by the downsampling process, and the downsampling parameter is set to 4, indicating that four pixel points are spaced between the two sample points. Since the size of the display state image is 2120×3800, the size of the downsampled image D_img obtained by the downsampling process is 530×950.

Since the downsampling process samples the respective pixel points on the display state image according to a preset pixel interval, it is easy to understand that the downsampling process does not change the pixel value distribution on the display state image, therefore, The downsampled image has the same uniformity distribution as the display state image, and the downsampling process effectively reduces the calculation amount of the entire uniformity testing process, which is beneficial to saving system computing resources.

Of course, if the computing resources of the system are sufficient, or the time for the uniformity testing process is long enough, the downsampling process may not be used.

Referring to FIG. 6 to FIG. 7 , in the third embodiment of the display uniformity testing method of the present invention, in the third embodiment of the display uniformity testing method of the present invention, step S14 includes:

Step S141, acquiring a preset image filtering template, where the size of the image filtering template is greater than a preset value;

Step S142, performing a filter convolution process on the initial image according to the image filtering template to generate the filtered image.

The image filtering template is G_img, and the filtered image may be pre-stored in the system. In this embodiment, the pixel value of each pixel on the image filtering template is set according to the following formula:

Where i denotes the abscissa of the pixel on the image filtering template, j denotes the ordinate of the pixel on the image filtering template, s denotes the size of each degree, and r denotes the video resolution of each degree, s> 0, r>0,1≤i≤N ₁ ,1≤j≤N ₂ , s and r can be set as needed, N ₁ is the length of the image filtering template, and N ₂ is the width of the image filtering template .

The image filtering template is configured to perform a filter convolution process on the initial image. Therefore, the larger the size of the image filtering template, the greater the filtering process speed. Therefore, N ₁ is preferably greater than or equal to 10, and N ₂ is preferably greater than Equal to 10, but the range of N ₁ and N ₂ is not thus limited.

In this embodiment, s is set to 10, r is set to 48, N _{1 is} set to 11, and N _{2 is} set to 11. Of course, the values of the four parameters can be set according to actual needs, and are not limited thereto.

After filtering convolution processing, the generated filtered image is H_img, where:

Referring to FIG. 8, in the fourth embodiment to the third embodiment of the display uniformity testing method of the present invention, in the fourth embodiment of the display uniformity testing method of the present invention, the step S20 includes:

Step S21, acquiring pixel values of each pixel on the initial image, and acquiring pixel values of each pixel on the filtered image;

Step S22, calculating, according to the pixel value of each pixel on the initial image and the pixel value of each pixel on the filtered image, each pixel on the initial image and the filtered image. The pixel value difference corresponding to the pixel;

Step S23, calculating a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

Step S24, generating the contrast image for characterizing the interference pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.

A pixel value difference between a certain pixel point on the initial image and a corresponding pixel point on the filtered image indicates a size of an interference pixel value of the pixel point on the initial image.

Since the pixel value of each pixel on the comparison image is obtained according to the ratio of the pixel value difference of each pixel point to the average of the pixel values, and the pixel value is a value greater than 0, therefore, In an embodiment, the pixel value difference is represented by an absolute value of the pixel value difference, and the comparison image is generated according to a ratio of an absolute value of the pixel value difference to a mean value of the pixel value.

The comparison image is C_img, and the calculation formula is:

Wherein, the downsampled image and the filtered image have the same size, N ₃ is the total number of pixels on the downsampled image D_img or the filtered image H_img, N ₃ >0, k is the value of the pixel on the downsampled image D_img or the filtered image H_img , 1 ≤ k ≤ N ₃ .

In the present embodiment, since the size of the downsampled image is 530 × 950, N ₃ = 503,500.

Referring to FIG. 9, in a fifth embodiment of the display uniformity testing method of the present invention, in the fifth embodiment of the display uniformity testing method of the present invention, after step S30, the method further includes:

Step S40, acquiring a position and a pixel value of each pixel on the uniformity distribution image, and generating the initial according to a size of the uniformity distribution image and a pixel value of each pixel on the uniformity distribution image. Image uniformity distribution simulation image.

Generating, according to the size of the uniformity distribution image and the pixel value of each pixel on the uniformity distribution image, a uniformity distribution simulation image of the display area of the display screen to be tested corresponding to the initial image, that is, And generating a uniformity distribution simulation image of the display area of the display screen to be tested corresponding to the display state image, where each pixel value is represented by a color different from other pixel values, or each The pixel value interval is represented by a color different from other pixel value intervals.

When a pixel point is different from the pixel value of the surrounding pixel point, or does not belong to the same pixel value interval, the color of the pixel point is different from the color of the surrounding pixel point, and the color difference can be used to clearly judge the position. The uniformity distribution of each display area on the test screen is described, so that the result of the uniformity distribution test is obtained quickly and accurately.

Referring to FIG. 10 to FIG. 12 , in the uniformity distribution simulation image shown in FIG. 12 , the pixel values of the respective pixel points have no significant color difference. Therefore, it can be determined that the uniformity of the display screen corresponding to the uniformity distribution simulation image is good.

Referring to FIG. 13 to FIG. 15 , in the uniformity distribution simulation image shown in FIG. 14 , there are many pixel points different from the surrounding color. For example, there are several pixels in the circle with different colors and surrounding colors. Therefore, it can be judged that the uniformity of the display screen corresponding to the uniformity distribution simulation image is poor, and the uniformity distribution of the display screen can be understood through the distribution of colors, and the determination method is simple and accurate.

In addition, referring to FIG. 2, FIG. 3 and FIG. 16, in order to achieve the above object, the first implementation of the present invention An example provides a display uniformity testing system, the display uniformity testing system comprising:

The processing module 10 is configured to obtain a display state image of the display screen to be tested, determine the display state image as an initial image, and perform filtering processing on the initial image to generate a filtered image;

The comparison image generation module 20 is configured to generate a comparison image for characterizing the interference pixel value of the initial image according to the difference between the initial image and the pixel value of each pixel on the filtered image;

The uniformity image generation module 30 is configured to generate a uniformity distribution image of the initial image according to a pixel value difference between each of the initial image and each pixel on the comparison image.

The display state image is obtained by high-definition camera shooting. In order to comprehensively analyze the uniformity of the display to be tested, the display state image should include all display areas of the display screen. In order to obtain the display state image with high brightness, when the display state image is taken, the display screen to be tested can be in the display state of the full white field signal. Of course, the display state image is not limited to being acquired under the full white field signal.

The filtering process is for removing noise of the initial image, the noise being in the display During the acquisition of the state image, the filtering process may use an averaging filter or a Gaussian filter due to image noise caused by jitter or sudden darkening of the light. Since the filtered image is obtained by filtering processing from the initial image, the size of the filtered image is the same as the size of the initial image.

Referring to FIG. 5 and FIG. 17, in the second embodiment of the display uniformity testing system of the present invention, the processing module 10 includes:

The first obtaining unit 11 is configured to obtain a display state image of the display screen to be tested;

a downsampling unit 12, configured to perform a down sampling process on the display state image to generate a downsampled image;

a determining unit 13 configured to determine the downsampled image as the initial image;

The filtering unit 14 is configured to perform filtering processing on the initial image to generate a filtered image.

The display state image is subjected to downsampling processing to reduce image pixel points and reduce the amount of calculation.

In this embodiment, a downsampled image D_img is generated by downsampling processing, and the downsampling is performed. The parameter is set to 4, which means that there are four pixels between the two sample points. Since the size of the display state image is 2120×3800, the size of the downsampled image D_img obtained by the downsampling process is 530×950.

Referring to FIG. 7 and FIG. 18, in the third embodiment of the display uniformity testing system of the present invention, the filtering unit 14 includes:

The obtaining sub-unit 141 is configured to acquire a preset image filtering template, where the size of the image filtering template is greater than a preset value;

The filtering sub-unit 142 is configured to perform a filter convolution process on the display state image according to the image filtering template to generate the filtered image.

Referring to FIG. 19, in the fourth embodiment to the third embodiment of the display uniformity testing system of the present invention, in the fourth embodiment of the display uniformity testing system of the present invention, the comparison image generating module 20 includes :

a second acquiring unit 21, configured to acquire a pixel value of each pixel on the initial image, and acquire a pixel value of each pixel on the filtered image;

a difference value calculation unit 22, configured to calculate each pixel point on the initial image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image. Deriving a pixel value difference of a corresponding pixel on the filtered image;

The mean value calculation unit 23 is configured to calculate a mean value of the pixel values of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image. ;

The comparison image generating unit 24 is configured to generate the contrast image for characterizing the interference pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.

The comparison image is C_img, and the calculation formula is:

Referring to FIG. 20, in a fifth embodiment of the display uniformity testing system of the present invention, the display uniformity testing system further includes:

The simulation module 40 is configured to acquire a position and a pixel value of each pixel on the uniformity distribution image, and generate a pixel value according to the size of the uniformity distribution image and the pixel value of each pixel on the uniformity distribution image. The uniformity distribution of the initial image is a simulated image.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

A method for testing uniformity of a display screen, comprising the steps of:

Obtaining a display state image of the display screen to be tested, determining the display state image as an initial image, and performing filtering processing on the initial image to generate a filtered image;

Generating a contrast image for characterizing the interfering pixel value of the initial image according to a difference in pixel values of the initial image and each pixel on the filtered image;

A uniformity distribution image of the initial image is generated according to a difference in pixel values of the initial image and each pixel on the comparison image.
The display uniformity testing method according to claim 1, wherein the obtaining a display state image of the display screen to be tested, determining the display state image as an initial image, and filtering the initial image To generate a filtered image, including:

Obtaining a display state image of the display to be tested;

Performing a down sampling process on the display state image to generate a downsampled image;

Determining the downsampled image as the initial image;

The initial image is subjected to filtering processing to generate a filtered image.
The display screen uniformity testing method according to claim 2, wherein the filtering processing the initial image to generate a filtered image comprises:

Obtaining a preset image filtering template, where the size of the image filtering template is greater than a preset value;

And performing filtering convolution processing on the initial image to generate the filtered image according to the image filtering template.
The display screen uniformity testing method according to claim 1, wherein the generating an interference for characterizing the initial image is generated according to a difference in pixel values of respective pixels on the initial image and the filtered image. Contrast images of pixel values, including:

Obtaining a pixel value of each pixel on the initial image, and acquiring a pixel value of each pixel on the filtered image;

Calculating each pixel point on the initial image and a corresponding pixel point on the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image Difference in pixel value;

Calculating a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And generating the contrast image for characterizing the interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display screen uniformity testing method according to claim 2, wherein the generating an interference for characterizing the initial image is generated according to a difference in pixel values of respective pixels on the initial image and the filtered image Contrast images of pixel values, including:

Obtaining a pixel value of each pixel on the initial image, and acquiring a pixel value of each pixel on the filtered image;

Calculating each pixel point on the initial image and a corresponding pixel point on the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image Difference in pixel value;

Calculating a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And generating the contrast image for characterizing the interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display screen uniformity testing method according to claim 3, wherein the generating an interference for characterizing the initial image is generated according to a difference in pixel values of respective pixels on the initial image and the filtered image Contrast images of pixel values, including:

Obtaining a pixel value of each pixel on the initial image, and acquiring a pixel value of each pixel on the filtered image;

Calculating each pixel on the initial image and the filter according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image The pixel value difference of the corresponding pixel on the wave image;

Calculating a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And generating the contrast image for characterizing the interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display screen uniformity testing method according to claim 1, wherein the uniformity distribution image of the initial image is generated according to a difference in pixel values of respective pixels on the initial image and the contrast image. After that, it also includes:

Obtaining a position and a pixel value of each pixel on the uniformity distribution image, and generating uniformity of the initial image according to a size of the uniformity distribution image and a pixel value of each pixel on the uniformity distribution image. Sexual distribution simulation image.
A display uniformity testing system, comprising:

a processing module, configured to acquire a display state image of the display screen to be tested, determine the display state image as an initial image, and perform filtering processing on the initial image to generate a filtered image;

a comparison image generating module, configured to generate a contrast image for characterizing an interfering pixel value of the initial image according to a pixel value difference between each of the initial image and each pixel on the filtered image;

And a uniformity image generating module, configured to generate a uniformity distribution image of the initial image according to a difference in pixel values of the initial pixels and respective pixel points on the contrast image.
The display uniformity testing system according to claim 8, wherein the processing module comprises:

a first acquiring unit, configured to acquire a display state image of the display screen to be tested;

a downsampling unit, configured to perform a downsampling process on the display state image to generate a downsampled image;

a determining unit, configured to determine the downsampled image as the initial image;

And a filtering unit, configured to perform filtering processing on the initial image to generate a filtered image.
The display uniformity testing system according to claim 9, wherein the filtering unit comprises:

Obtaining a sub-unit, configured to acquire a preset image filtering template, where the size of the image filtering template is greater than a preset value;

And a filtering subunit, configured to perform a filter convolution process on the display state image according to the image filtering template to generate the filtered image.
The display uniformity testing system according to claim 8, wherein the comparison image generating module comprises:

a second acquiring unit, configured to acquire a pixel value of each pixel on the initial image, and acquire a pixel value of each pixel on the filtered image;

a difference value calculation unit, configured to calculate, according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image, each pixel point on the initial image and the a difference in pixel values of corresponding pixels on the filtered image;

a mean value calculation unit, configured to calculate a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And a contrast image generating unit, configured to generate the contrast image for characterizing an interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display uniformity testing system according to claim 9, wherein the comparison image generating module comprises:

a second acquiring unit, configured to acquire a pixel value of each pixel on the initial image, and acquire a pixel value of each pixel on the filtered image;

a difference value calculation unit, configured to calculate, according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image, each pixel point on the initial image and the a difference in pixel values of corresponding pixels on the filtered image;

Mean calculating unit for using pixel values of each pixel on the initial image And calculating a pixel value mean value of the initial image and the filtered image, and a pixel value of each pixel on the filtered image;

And a contrast image generating unit, configured to generate the contrast image for characterizing an interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display screen uniformity testing system according to claim 10, wherein the comparison image generation module comprises:

a second acquiring unit, configured to acquire a pixel value of each pixel on the initial image, and acquire a pixel value of each pixel on the filtered image;

a difference value calculation unit, configured to calculate, according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image, each pixel point on the initial image and the a difference in pixel values of corresponding pixels on the filtered image;

a mean value calculation unit, configured to calculate a pixel value mean value of the initial image and the filtered image according to a pixel value of each pixel on the initial image and a pixel value of each pixel on the filtered image;

And a contrast image generating unit, configured to generate the contrast image for characterizing an interfering pixel value of the initial image according to a ratio of the pixel value difference to the pixel value mean value.
The display uniformity testing system of claim 8, wherein the display uniformity testing system further comprises:

And a simulation module, configured to acquire a position and a pixel value of each pixel on the uniformity distribution image, and generate a location according to the size of the uniformity distribution image and the pixel value of each pixel on the uniformity distribution image. A uniformity distribution simulation image of the initial image.