CN115705807A - Method, device, equipment and medium for testing low-gray display effect of display screen - Google Patents

Abstract

The embodiment of the invention discloses a test method, device, equipment and medium for the low-gray display effect of a display screen. The method includes: determining that the image of the display screen to be tested is displayed in a preset low grayscale parameter configuration as the image to be tested; based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixel points of the display screen to be tested According to the pixel value of the image pixel in the image to be tested, the pixel value of each pixel to be tested in the display screen to be tested is determined; according to the comparison result of the pixel value of each pixel to be tested with the average pixel value of the entire screen of the display screen to be tested, Determine the test result of the low gray display effect of the display screen to be tested under the preset low gray scale parameters. By mapping the pixels of the image with the pixels of the display screen, and using the comparison result of the pixel value of each pixel point of the display screen with the average value of the entire screen, the low-gray display effect is quantitatively tested, which improves the test efficiency and accuracy of the low-gray display effect of the display screen. Rate.

Description

Test method, device, equipment and medium for low-gray display effect of display screen

technical field

The embodiments of the present invention relate to the field of display technology, and in particular to a method, device, equipment and medium for testing the low-gray display effect of a display screen.

Background technique

With the continuous development of display device technology, a multi-level grayscale display technology has appeared on the display screen, such as an LED screen. The improvement of the display gray scale greatly improves the display fineness of the screen, but the LED screen is used as a display device, and the low gray display effect is very important, that is, the display effect of the LED screen when each pixel is a low gray value, the common low gray Display problems include the darkening of the first line of low gray, uneven low gray blocks, and dark lines when low gray is gradually displayed.

Therefore, it is necessary to test the display effect of the LED screen with a low gray value during the LED R&D test stage and the production test stage. The existing technology mainly relies on manual visual judgment to manually adjust the gray level of the LED screen, for example, set the gray level from 1 to 50 or 100 one by one, and observe the LED display effect under different low gray levels.

However, due to the different experience of different staff members in this method, and some problems such as uneven low-gray display of some color blocks, dark first line, and low-gray gradient dark lines are more obvious only when the entire LED screen is spliced together. In a single box of the LED screen The display is not obvious, which has a certain impact on the accuracy of the test results, and is prone to missed judgments. And if you want to test the display effects of different low gray levels, you need to manually adjust the gray values one by one, resulting in low test efficiency.

Contents of the invention

Embodiments of the present invention provide a method, device, equipment and medium for testing the low-gray display effect of a display screen, which improve the test efficiency and accuracy of the low-gray display effect of the display screen.

In the first aspect, an embodiment of the present invention provides a method for testing the low-gray display effect of a display screen, including:

Determine that the image of the display screen to be tested is the image to be tested when it is displayed in the preset low grayscale parameter configuration;

Based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested, according to the pixel values of the image pixels in the image to be tested, determine the The pixel value of each pixel to be tested;

According to the comparison result of the pixel value of each of the pixel points to be tested and the average pixel value of the entire screen of the display screen to be tested, determine the low gray display effect test of the display screen to be tested under the preset low gray scale parameters result.

In the second aspect, the embodiment of the present invention also provides a test device for the low-gray display effect of the display screen, including:

The image to be tested determination module is used to determine that the image of the display screen to be tested is the image to be tested when the preset low grayscale parameter configuration is displayed;

A pixel value determination module, configured to determine according to the pixel values of the image pixels in the image to be tested based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested The pixel value of each pixel to be tested in the display screen to be tested;

A display effect testing module, configured to determine the preset low grayscale parameter of the display screen to be tested according to the comparison result between the pixel values of the pixel points to be tested and the average pixel value of the entire screen of the display screen to be tested The lower gray shows the effect test results.

In a third aspect, an embodiment of the present invention also provides an electronic device, including:

one or more processors;

storage means for storing one or more programs,

When the one or more programs are executed by the one or more processors, the one or more processors implement the method for testing the low-gray display effect of the display screen according to any embodiment of the present invention.

In the fourth aspect, the embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the low-gray display effect of the display screen as described in any embodiment of the present invention is realized. test method.

The embodiment of the present invention determines that the image of the display screen to be tested is the image to be tested when it is displayed in a preset low grayscale parameter configuration; based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixel points of the display screen to be tested , determine the pixel value of each pixel to be tested in the display screen to be tested according to the pixel value of the image pixel in the image to be tested; according to the comparison result of the pixel value of each pixel to be tested with the average pixel value of the entire screen of the display screen to be tested, Determine the low-gray display effect test results of the display screen to be tested under preset low-grayscale parameters. Through the image algorithm, the image pixels are mapped to the pixels of the display screen, and the low-gray display effect is quantitatively tested by using the comparison result of the pixel value of each pixel point of the display screen with the average value of the entire screen, which improves the test efficiency of the low-gray display effect of the display screen and accuracy.

Description of drawings

Fig. 1 is a flow chart of the test method for the low-gray display effect of the display screen in Embodiment 1 of the present invention;

2 is a schematic diagram of a test device for the low-gray display effect of the LED screen in Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of determining the actual pixel luminous range of the LED screen to be tested in Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of sub-region division of an actual image pixel point region in Embodiment 1 of the present invention;

Fig. 5 is a schematic structural diagram of a test device for the low-gray display effect of the display screen in Embodiment 2 of the present invention;

FIG. 6 is a schematic structural diagram of an electronic device in Embodiment 3 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

Embodiment one

Figure 1 is a flow chart of the test method for the low-gray display effect of the display screen in Embodiment 1 of the present invention. This embodiment is applicable to the low-gray effect inspection of the display screen in the R&D test stage and the production test stage, such as small pitch LED screen. The method can be performed by a test device for low-gray display effect of the display screen, the device can be implemented in the form of software and/or hardware, and can be configured in electronic equipment, for example, the electronic equipment can be a background server with communication and computing capabilities device of. As shown in Figure 1, the method specifically includes:

Step 101. Determine the image to be tested when the display screen to be tested is configured and displayed with preset low gray scale parameters.

Among them, the display screen refers to a display that realizes color through various display technologies. For example, the display screen to be tested can be an LED screen, etc., and the LED screen to be tested refers to a small-pitch LED screen that is to be tested for a display effect in a low grayscale. Spacing means that the gap between the lamp beads in the LED screen is less than 2.5mm. The preset low grayscale parameter refers to the low grayscale level that needs to be tested. Specifically, each pixel in the LED screen includes three lamp beads, and each of the three lamp beads emits a single light of red, green and blue. By setting the three color The brightness value of each pixel is determined by the brightness value of each pixel. The preset low gray level parameter is determined by setting the brightness value of the three lamp beads. For example, the low gray level that needs to be tested is red and the low gray level value is 1, then The corresponding low grayscale parameters are: the brightness value of the red light bead is 1, the brightness of the green light bead is 0, and the brightness value of the blue light bead is 0; the low grayscale level to be tested is green and the low grayscale value is 1, Then the corresponding low gray scale parameters are: the brightness value of the red light bead is 0, the brightness of the green light bead is 1, and the brightness value of the blue light bead is 0; the low gray scale level to be tested is the blue low gray scale value 1, the corresponding low grayscale parameters are: the brightness value of the red light bead is 0, the brightness of the green light bead is 0, and the brightness value of the blue light bead is 1; the low grayscale level to be tested is white low grayscale value is 1, the corresponding low gray scale parameters are: the brightness value of the red light bead is 1, the brightness of the green light bead is 1, and the brightness value of the blue light bead is 1; correspondingly, different low gray scale levels can be set according to this method low grayscale parameters. Optionally, the preset low grayscale parameters include multiple parameters of different low grayscale levels, so as to test display effects under multiple low grayscale levels.

Specifically, light up the display screen to be tested, and configure the brightness value of each lamp bead in the display screen to be tested according to the preset low grayscale parameters, take a photo of the displayed screen, and the image obtained including the display screen is the image to be tested. test image. If the preset low grayscale parameters include multiple parameters of different low grayscale levels, since the mapping relationship between the image pixels of the image to be tested and the pixels to be tested on the display screen to be tested is pre-established, based on the mapping When testing the relationship, the positional relationship between the image acquisition device and the display screen to be tested needs to be fixed.

In a feasible embodiment, the preset low grayscale parameters are preset in the configuration parameter file; wherein, the configuration parameter file includes preset low grayscale parameters of at least two low-order grayscale levels;

Correspondingly, step 101 includes:

Read the preset low grayscale parameters in the configuration parameter file sequentially through the sending card;

Send the preset low grayscale parameters to the receiving card connected to the sending card;

Control the receiving card connected to the display screen to be tested to send the preset low grayscale parameters to the display;

It is determined that the image taken when the display screen to be tested is displayed under the preset low grayscale parameter configuration is the image to be tested.

Wherein, the configuration parameter file includes preset low grayscale parameters for controlling at least two low grayscale levels of grayscale displayed on the display screen, so as to test different low grayscale display effects. Exemplarily, the configuration parameter file includes gray levels from 1 to X, displaying red, green, blue and white parameters, where the value of X can be set to 50 or 100, which can be set according to the actual situation, and will not be described here. limit.

The sending card is used to read the grayscale parameters of the control display in the configuration parameter file, for example, a Flash is plugged into the logic processing chip (FPGA) inside the sending card, and the configuration parameter file for controlling the grayscale of the display is written in the Flash . After the sending card reads the preset low grayscale parameter, it sends the parameter to the receiving card, so that the receiving card can send the display, so that the display screen to be tested can be displayed according to the preset low grayscale parameter.

Specifically, as shown in Figure 2 is a schematic diagram of the test device for the low-gray display effect of the LED screen. It is connected to the receiving card through the network cable, and then the receiving card is connected to the LED board to be tested through the HUB board for sending display; the logic processing chip (FPGA) inside the sending card is plugged with a Flash, and the configuration parameter file needs to be written into the Flash. In the actual test, light up the LED screen, and the PC controls the sending card to read the preset low grayscale parameters in the configuration parameter file in turn, for example, the red low grayscale value is 1, and after the receiving card sends this parameter to the display, the PC controls the camera Take a photo to get the image to be tested with a red low grayscale value of 1; then the PC reads the next preset low grayscale parameter according to the order in the configuration parameter file, for example, the green low grayscale value is 1, and follow this method Take pictures to obtain the image to be tested with a green low grayscale value of 1, and so on, to obtain the image to be tested with all the low grayscale parameters set in the configuration parameter file. During this process, the position between the camera and the LED needs to be kept fixed, so as not to affect the accuracy of the subsequent mapping relationship.

By controlling the sending card to read different low-grayscale parameters in the configuration parameter file, control the output of low-gray to-be-tested images of different small-pitch display screens, improve test efficiency, and avoid artificially adjusting grayscale values in sequence.

Step 102, based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested, determine each pixel to be tested in the display screen to be tested according to the pixel values of the image pixels in the image to be tested pixel value.

Wherein, the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen includes the actual corresponding image pixel of each pixel to be tested in the image to be tested.

Specifically, pixel extraction is performed on the image to be tested, so as to align each pixel to be tested in the display screen to be tested. Exemplarily, based on the mapping relationship, the image to be tested is divided into pixels, so that the image pixels in the image to be tested correspond to the pixels to be tested on the display screen. A target image pixel point corresponding to the target pixel point to be detected is determined, and a pixel value of the target pixel point to be detected is determined according to the pixel value of the target image pixel point. Exemplarily, the average pixel value of each component of the pixel point of the target image is used as the pixel value of each component of the target pixel point to be measured.

In a feasible embodiment, the mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested is established through the following steps:

Determining that the display area of the display screen to be tested in the image to be tested is an effective area;

determining the area resolution of the effective area according to the image resolution of the image to be tested;

According to the proportional relationship between the area resolution and the display screen resolution of the display screen to be tested, determine the theoretical image pixel area mapped to each pixel to be tested in the image to be tested and the display screen to be tested;

Determine the actual pixel luminous range of each pixel to be tested according to the packaging edge parameters and gap parameters of the display screen to be tested;

Determine the actual image pixel area mapped to the actual pixel luminescence range in the theoretical image pixel area.

Since the image to be tested includes not only the display screen but also the shooting background, it is first necessary to extract the area where the display screen is located to obtain an effective area that only includes the display screen. This extraction can be determined based on edge extraction or a predetermined positional relationship. This is not limited. After the effective area is determined, the regional resolution of the effective area is determined according to the image resolution of the image to be tested, wherein the image resolution of the image to be tested is determined according to the parameters of the image acquisition device itself, and the regional resolution of the effective area is determined according to the The extracted positional relationship in the image to be tested is determined. The display resolution of the display screen to be tested can also be determined according to the attribute parameters of the screen. According to the proportional relationship between the resolution of the area where the display screen is located and the resolution of its own display screen, it can be determined that a pixel on the display screen is in the image The theoretical image pixel area corresponding to above.

Exemplarily, the resolution of the image to be tested is determined to be 1920*1080 according to the attribute parameters of the image acquisition device, and the area resolution of the effective area is determined to be 1620*960 according to the extraction position of the effective area. According to the attribute parameters of the display screen to be tested, the resolution of the display screen is determined to be 162*96, that is, the pixels on the display screen are 162*96, and the pixels included in the effective area on the corresponding image are 1620*960, and the display screen The size of each pixel on the screen is the same, it can be determined that the area occupied by each pixel to be tested on the image to be tested is the corresponding 10*10 image pixels, and further can be determined that each pixel to be tested The theoretical image pixel area corresponding to the pixel on the image to be tested.

When the display screen is an LED screen, since the LED screen is composed of multiple lamp beads, there are gaps between the lamp beads, and the pixels need to be packaged, and there are seams between different pixels, so when establishing the image to be tested When mapping the pixel points of the image and the pixels to be tested on the LED screen to be tested, the interference between the patchwork and the gap between the LED lamp beads should be avoided, so as to make the final mapping relationship more accurate. Figure 3 is a schematic diagram of determining the actual pixel luminous range of the pixel to be tested on the LED screen. As shown in Figure 3, each box unit represents a pixel to be tested. The package edge parameters of the pixel and the gap parameters of the LED lamp bead can be determined according to the attribute parameters of the LED screen. According to the LED lamp bead gap and the package edge can be determined The actual light-emitting area of the pixel to be tested is obtained, and the actual light-emitting range of the pixel to be tested is determined according to the relationship between the actual light-emitting area and the area of the pixel to be tested. Then, according to the positional relationship between the actual pixel light-emitting range and the pixel point to be measured, the actual image pixel point area in the theoretical image pixel point area is determined. Exemplarily, when determining the actual image pixel area of the pixel to be tested, taking the first pixel to be tested in the upper left corner as an example, the theoretical image pixel area is a range of 10*10 from the upper left corner of the effective area, According to the positional relationship between the actual pixel luminous range and the pixel to be tested, it is determined that the actual image pixel area of the pixel to be tested is a square area with the coordinates of the upper left corner being 2*2 and the coordinates of the lower right corner being 8*8, that is, at 10* The area of two surrounding pixels within the range of 10 is the actual non-luminous area brought about by the edge of the package and the gap between the LEDs. The actual calculation process of the two pixels can be determined according to the parameters of the package edge and the gap, which belongs to those skilled in the art. Common techniques are not repeated here. The other pixel points to be tested are deduced by analogy, and the actual image pixel area associated with the other pixel points to be tested is determined in turn.

In a feasible embodiment, step 102 includes:

Based on the mapping relationship, determine the actual image pixel point area mapped to the target pixel point to be measured in the display screen to be tested in the image to be tested;

The pixel value of the target pixel to be tested in the display screen to be tested is determined according to the pixel value of the pixel area of the actual image.

Based on the mapping relationship established above, the actual image pixel area mapped to each pixel to be tested in the image to be tested is sequentially determined, wherein the target pixel to be tested is each pixel to be tested. After the actual image pixel area of each pixel to be tested is determined, the pixel value in the actual image pixel area is read from the image, and the pixel value corresponding to the pixel to be tested is determined according to the pixel value. Exemplarily, the average value of the pixel values in the actual image pixel point area is used as the pixel value corresponding to the pixel point to be measured. When the pixel value includes RGB three component values, the average value of each component value in the actual image pixel area is used as the component pixel value corresponding to the pixel point to be measured. Alternatively, at least two points are selected from the pixel area of the actual image, and the pixel value of the pixel to be measured is taken as the pixel value of the pixel value of the at least two points.

In a feasible embodiment, the pixel value of the target pixel to be tested in the display screen to be tested is determined according to the pixel value of the pixel area of the actual image, including:

Divide the actual image pixel area into at least two sub-areas;

Sampling the pixels in each sub-region, and using the average pixel value of the sampled pixels as the pixel value of the sub-region;

The average value of the pixel values of at least two sub-regions is used as the pixel value of the target pixel point to be tested in the display screen to be tested.

Since the number of pixels included in the actual image pixel area corresponding to each pixel to be measured may be large, if every pixel in the actual image pixel area is involved in the calculation, the amount of calculation will increase. Therefore, in the embodiment of the present invention, the actual image pixel area is divided into multiple sub-areas, the pixels in the sub-areas are sampled, the pixel value of the sub-area is determined according to the pixel value of the sampled pixel, and then the pixel value of the sub-area is determined according to the pixel value of the sub-area. Value determines the pixel value of the actual image pixel area, which is used as the pixel value of the target pixel to be tested.

Exemplarily, as shown in Figure 4 is a schematic diagram of sub-region division of the actual image pixel area, the actual image pixel area is divided into four sub-areas in equal proportions, and samples are taken from each sub-area, and the number of samples is determined according to the test accuracy. Setting, without limitation, the average pixel value of each component of the sampled pixel point is used as the pixel value of the corresponding component of the sub-region, and then the pixel value of each component of the target pixel point to be tested is determined according to the average value of the pixel value of each component of the sub-region.

Step 103, according to the comparison result of the pixel value of each pixel to be tested and the average pixel value of the entire screen of the display screen to be tested, determine the test result of the low gray display effect of the display screen to be tested under the preset low grayscale parameters.

After determining the pixel value of each pixel to be tested, the pixel values of all the pixels to be tested are averaged as the average value of the entire screen pixel, and then the pixel value of each pixel to be tested is compared with the average value of the entire screen pixel, that is It can be obtained whether there is a large gap between the pixel value of any pixel point and the average value. If the gap is too large, it means that the effect of the pixel point is poor under low-gray display, and there is a certain problem.

Since most of the pixels of the entire display screen have no problem in low-gray display, only a few pixels have display problems, so the average value of the entire screen pixels can reflect the theoretical level of the display screen in low-gray display. The pixel value of the measured pixel is compared with the theoretical level, which not only realizes the quantification of the color cast test of the display screen, but also improves the test accuracy.

Exemplarily, on the basis of the above example, the effective area is divided into 162*96=15552 units according to the pixels to be tested, and each unit takes 4 points to calculate the average value of the pixel value, thus obtaining 15552 values, because The number of sampling points is large enough, this value can represent the average level of color components of all pixels of the display screen, and then judge the difference between each point and this average value, you can judge whether the entire screen has color cast or not.

In a feasible embodiment, the display screen to be tested is an LED screen to be tested, and the pixel value of each pixel to be tested includes an R component value, a G component value and a B component value of each pixel to be tested;

Correspondingly, step 103 includes:

According to each component value of each pixel point to be tested, determine the average value of the entire screen of the R component, the average value of the entire screen of the G component, and the average value of the entire screen of the B component of the LED screen to be tested;

Determine the LED to be tested according to the comparison results of the R component value of each pixel to be tested with the average value of the entire screen of the R component, the comparison result of the value of the G component with the average value of the entire screen of the G component, and the comparison result of the value of the B component with the average value of the entire screen of the B component. The low-gray display effect test results of the screen under the preset low-grayscale parameters.

The pixel to be tested includes three single-color lamp beads, so the pixel value of the pixel to be tested includes RGB component values. Then, according to the pixel value of the actual image pixel area, it is determined that the pixel value of the target pixel to be tested in the LED screen to be tested also includes three component values. According to the average value of each component value of all pixels to be tested, determine the average value of the entire screen of the R component, the average value of the entire screen of the G component, and the average value of the entire screen of the B component of the LED screen to be tested. Exemplarily, the R, G, and B component values of each pixel to be tested are determined to be R1˜Ri, G1˜Gi, and B1˜Bi, respectively, where i represents the number of pixels to be tested. Calculate the mean value M1 of R1~Ri as the whole screen mean of R component; the mean value M2 of G1~Gi is the whole screen mean value of G component; the mean value M3 of B1~Bi is the whole screen mean value of B component.

Determine the difference between each component value of each pixel to be tested and the average value of the entire screen of the component. If the difference between any component value of any pixel to be tested is too large, it means that the pixel to be tested is under the preset grayscale parameter. There is a problem with the display of .

In a feasible embodiment, according to the comparison result of the R component value of each pixel point to be measured with the average value of the entire screen of the R component, the comparison result of the value of the G component and the average value of the entire screen of the G component, and the comparison result of the value of the B component and the average value of the entire screen of the B component The comparison results, determine the low-gray display effect test results of the LED screen to be tested under the preset low-grayscale parameters, including:

If the difference between the R component value and the average value of the entire screen of the R component of all the pixels to be tested in the LED screen to be tested is within the preset range, the difference between the value of the G component and the average value of the entire screen of the G component is within the preset range, and the value of the B component If the difference between the average value of the whole screen and the B component is within the preset range, it is determined that the test result of the low-gray display effect of the LED screen to be tested under the preset low-grayscale parameters is a test pass.

Judge丨R1-M1丨≤Y&丨R2-M1丨≤Y...丨Ri-M1丨≤Y&丨G1-M2丨≤Y&丨G2-M2丨≤Y...丨Gi-M2丨≤Y&丨B1-M3丨Whether ≤Y&丨B2-M3丨≤Y...丨Bi-M3丨≤Y is satisfied, if all are satisfied, then determine the test result of the low-gray display effect of the LED screen to be tested under the preset low-grayscale parameters as a test pass; if If either condition is not met, it is determined that the test fails. The Y value is a preset range, which can be set according to the product quality level of the LED screen. The smaller the Y value, the higher the display quality level of the LED screen. There is no limit to the specific value here.

Optionally, if it is determined that the test fails under the preset low grayscale parameters, it means that the display screen has a low grayscale display problem, and there is no need to continue the test; if it is determined that the test passes under the preset low grayscale parameters, continue To test, the sending card continues to obtain the next preset low grayscale parameter from the configuration parameter file, and continues to judge the image to be tested with the preset low grayscale parameter. If the test result of any preset low-grayscale parameter in the configuration parameter file is that the test fails, then there is a problem with the low-gray display on the display; only if the test results of all preset low-grayscale parameters in the configuration parameter file are Pass, then there is no problem with the low gray display of this display. In the case of outputting different images to be tested, the corresponding relationship between the camera image pixels and the small-pitch LED pixels is used to obtain the average value of the LED pixel chromaticity, and the difference between the LED pixel chromaticity component and the average value of the entire screen is used to judge the pixel. Color cast, so that the color cast test can be quantified, improving the test efficiency and accuracy.

In the embodiment of the present invention, image pixels are mapped to display screen pixels through an image algorithm, and the low-gray display effect is quantitatively tested by using the comparison result of each pixel pixel value of the display screen with the average value of the entire screen, thereby improving the low-gray display of the display screen. The test efficiency and accuracy of the effect.

Embodiment two

Fig. 5 is a schematic structural diagram of the test device for the low-gray display effect of the display screen in Embodiment 2 of the present invention. This embodiment is applicable to the low-gray effect inspection of the small-pitch LED screen in the R&D test stage and the production test stage. As shown in Figure 5, the device includes:

The image to be tested determination module 510 is used to determine that the image of the display screen to be tested is the image to be tested when the preset low grayscale parameter configuration is displayed;

The pixel value determination module 520 is configured to, based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested, according to the pixel values of the image pixels in the image to be tested Determine the pixel value of each pixel to be tested in the display screen to be tested;

The display effect testing module 530 is configured to determine the preset low gray level of the display screen to be tested according to the comparison result between the pixel value of each pixel point to be tested and the average pixel value of the entire screen of the display screen to be tested. The low gray under the parameters shows the effect test results.

Optionally, the device includes a mapping relationship establishment module, specifically for:

Determining that the display area of the display screen to be tested in the image to be tested is an effective area;

determining the area resolution of the effective area according to the image resolution of the image to be tested;

According to the proportional relationship between the area resolution and the display screen resolution of the display screen to be tested, determine the theoretical image pixel area mapped to each pixel to be measured in the display screen to be tested in the image to be tested ;

determining the actual pixel light-emitting range of each pixel to be tested according to the package edge parameters and gap parameters of the display screen to be tested;

An actual image pixel area mapped to the actual pixel light emission range in the theoretical image pixel area is determined.

Optionally, the pixel value determination module includes:

A pixel mapping unit, configured to determine, based on the mapping relationship, an actual image pixel region mapped to a target pixel to be tested in the display to be tested in the image to be tested;

A pixel value determining unit, configured to determine the pixel value of the target pixel to be tested in the display screen to be tested according to the pixel value of the pixel area of the actual image.

Optionally, the pixel value determination unit is specifically used for:

dividing the actual image pixel area into at least two sub-areas;

Sampling the pixels in each sub-region, and using the average pixel value of the sampled pixels as the pixel value of the sub-region;

Taking the average value of the pixel values of the at least two sub-regions as the pixel value of the target pixel to be tested in the display screen to be tested.

Optionally, the display screen to be tested is an LED screen to be tested, and the pixel value of each pixel to be tested includes an R component value, a G component value and a B component value of each pixel to be tested;

Correspondingly, the display effect test module includes:

The whole screen mean value determination unit is used to determine the R component whole screen mean value, the G component whole screen mean value and the B component whole screen mean value of the LED screen to be tested according to each component value of each pixel point to be tested;

The pixel value comparison unit is used for comparing the R component value of each pixel point to be measured with the average value of the entire screen of the R component, the comparison result of the value of the G component with the average value of the entire screen of the G component, and the value of the B component and the average value of the entire screen of the G component. The comparison result of the average value of the whole screen of the B component determines the test result of the low gray display effect of the LED screen to be tested under the preset low gray scale parameters.

Optionally, the pixel value comparison unit includes:

If the difference between the R component value of all pixels to be tested of the LED screen to be tested and the average value of the entire screen of the R component is within a preset range, the difference between the value of the G component and the average value of the entire screen of the G component is within a preset range. If the difference between the value of the B component and the average value of the entire screen of the B component is within the preset range, it is determined that the test result of the low-gray display effect of the LED screen to be tested under the preset low-grayscale parameters is a test pass.

Optionally, the preset low grayscale parameters are preset in a configuration parameter file; wherein, the configuration parameter file includes preset low grayscale parameters of at least two low-order grayscale levels;

Correspondingly, the image to be tested determination module is specifically used for:

Read the preset low grayscale parameters in the configuration parameter file sequentially through the sending card;

Send the preset low grayscale parameter to the receiving card connected to the sending card;

Controlling the receiving card connected to the display screen to be tested to send the preset low grayscale parameters to display;

It is determined that the image taken when the display screen to be tested is displayed under the preset low grayscale parameter configuration is the image to be tested.

The test device for the low-gray display effect of the display screen provided by the embodiment of the present invention can execute the test method for the low-gray display effect of the display screen provided by any embodiment of the present invention, and has the corresponding functions for performing the test method for the low-gray display effect of the display screen Modules and benefits.

Embodiment three

FIG. 6 is a schematic structural diagram of an electronic device provided by Embodiment 3 of the present invention. Figure 6 shows a block diagram of an exemplary electronic device 12 suitable for use in implementing embodiments of the present invention. The electronic device 12 shown in FIG. 6 is only an example, and should not limit the functions and scope of use of this embodiment of the present invention.

As shown in FIG. 6, electronic device 12 takes the form of a general-purpose computing device. Components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, system storage 28, bus 18 connecting various system components including system storage 28 and processing unit 16.

Bus 18 represents one or more of several types of bus structures, including a storage device bus or controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus structures. These architectures include, by way of example, but are not limited to Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect ( PCI) bus.

Electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by electronic device 12 and include both volatile and nonvolatile media, removable and non-removable media.

System storage 28 may include computer system readable media in the form of volatile storage, such as random access storage (RAM) 30 and/or cache storage 32 . The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read and write to non-removable, non-volatile magnetic media (not shown in FIG. 6, commonly referred to as a "hard drive"). Although not shown in FIG. 6, a disk drive for reading and writing to removable non-volatile disks (such as "floppy disks") may be provided, as well as for removable non-volatile optical disks (such as CD-ROM, DVD-ROM or other optical media) CD-ROM drive. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Storage device 28 may include at least one program product having a set (eg, at least one) of program modules configured to perform the functions of various embodiments of the present invention.

A program/utility tool 40 having a set (at least one) of program modules 42, such as but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include the implementation of the network environment. Program modules 42 generally perform the functions and/or methodologies of the described embodiments of the invention.

Electronic device 12 may also communicate with one or more external devices 14 (e.g., a keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with The device 12 is capable of communicating with any device (eg, network card, modem, etc.) that communicates with one or more other computing devices. Such communication may occur through input/output (I/O) interface 22 . Moreover, the electronic device 12 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and/or a public network such as the Internet) through the network adapter 20 . As shown in FIG. 6 , network adapter 20 communicates with other modules of electronic device 12 via bus 18 . It should be appreciated that although not shown in FIG. 6, other hardware and/or software modules may be used in conjunction with electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape Drives and data backup storage systems, etc.

The processing unit 16 executes various functional applications and data processing by running the programs stored in the system storage device 28, such as implementing the method for testing the low-gray display effect of the display screen provided by the embodiment of the present invention, including:

Determine that the image of the display screen to be tested is the image to be tested when it is displayed in the preset low grayscale parameter configuration;

Based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested, according to the pixel values of the image pixels in the image to be tested, determine the The pixel value of each pixel to be tested;

According to the comparison result of the pixel value of each of the pixel points to be tested and the average pixel value of the entire screen of the display screen to be tested, determine the low gray display effect test of the display screen to be tested under the preset low gray scale parameters result.

Embodiment four

Embodiment 4 of the present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for testing the low-gray display effect of the display screen as provided in the embodiment of the present invention is realized, including :

Determine that the image of the display screen to be tested is the image to be tested when it is displayed in the preset low grayscale parameter configuration;

Based on the pre-established mapping relationship between the image pixels of the image to be tested and the pixels to be tested of the display screen to be tested, according to the pixel values of the image pixels in the image to be tested, determine the The pixel value of each pixel to be tested;

According to the comparison result of the pixel value of each of the pixel points to be tested and the average pixel value of the entire screen of the display screen to be tested, determine the low gray display effect test of the display screen to be tested under the preset low gray scale parameters result.

The computer storage medium in the embodiments of the present invention may use any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more leads, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a data signal carrying computer readable program code in baseband or as part of a carrier wave. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. .

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out the operations of the present invention may be written in one or more programming languages, or combinations thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming language such as "C" or a similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. Where a remote computer is involved, the remote computer may be connected to the user computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g. via the Internet using an Internet Service Provider). .

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. A method for testing the low-gray display effect of a display screen is characterized by comprising the following steps:

determining an image of a display screen to be tested when a preset low-gray parameter configuration is displayed as an image to be tested;

determining the pixel value of each pixel point to be tested in the display screen to be tested according to the pixel value of the image pixel point in the image to be tested based on the pre-established mapping relation between the image pixel point of the image to be tested and the pixel point to be tested of the display screen to be tested;

and determining a low-gray display effect test result of the display screen to be tested under the preset low-gray parameter according to a comparison result of the pixel value of each pixel point to be tested and the whole-screen pixel mean value of the display screen to be tested.

2. The method of claim 1, wherein the mapping relationship between the image pixel points of the image to be tested and the pixel points of the display screen to be tested is established by the following steps:

determining a display area of the display screen to be tested in the image to be tested as an effective area;

determining the area resolution of the effective area according to the image resolution of the image to be tested;

determining theoretical image pixel point regions mapped with all to-be-detected pixel points in the to-be-detected display screen in the to-be-detected image according to the proportional relation between the region resolution and the display screen resolution of the to-be-detected display screen;

determining the actual pixel light-emitting range of each pixel point to be tested according to the packaging edge parameter and the gap parameter of the display screen to be tested;

and determining an actual image pixel point region which is mapped with the actual pixel light-emitting range in the theoretical image pixel point region.

3. The method of claim 2, wherein determining the pixel value of each pixel point to be tested in the display screen to be tested according to the pixel value of the image pixel point in the image to be tested based on a pre-established mapping relationship between the image pixel point of the image to be tested and the pixel point to be tested of the display screen to be tested comprises:

determining an actual image pixel point region which is mapped with a target pixel point to be tested in the display screen to be tested in the image to be tested based on the mapping relation;

and determining the pixel value of the target pixel point to be tested in the display screen to be tested according to the pixel value of the actual image pixel point area.

4. The method of claim 3, wherein determining the pixel value of the target pixel to be tested in the display screen to be tested according to the pixel value of the actual image pixel area comprises:

dividing the actual image pixel point region into at least two sub-regions;

sampling pixel points in each sub-region, and taking the average pixel value of the sampled pixel points as the pixel value of the sub-region;

and taking the pixel value mean value of the at least two sub-areas as the pixel value of the target pixel point to be tested in the display screen to be tested.

5. The method according to claim 1, wherein the display screen to be tested is an LED screen to be tested, and the pixel value of each pixel point to be tested comprises an R component value, a G component value and a B component value of each pixel point to be tested;

correspondingly, according to the comparison result between the pixel value of each pixel point to be tested and the whole-screen pixel mean value of the display screen to be tested, determining the low-gray display effect test result of the display screen to be tested under the preset low-gray parameter, including:

determining an R component whole-screen average value, a G component whole-screen average value and a B component whole-screen average value of the LED screen to be tested according to component values of the pixel points to be tested;

and determining a low-gray display effect test result of the LED screen to be tested under the preset low-gray parameter according to a comparison result of the R component value of each pixel point to be tested and the R component whole-screen average value, a comparison result of the G component value and the G component whole-screen average value and a comparison result of the B component value and the B component whole-screen average value.

6. The method as claimed in claim 5, wherein determining the result of testing the low gray display effect of the LED screen to be tested under the preset low gray parameter according to the result of comparing the R component value of each pixel point to be tested with the R component whole-screen average value, the result of comparing the G component value with the G component whole-screen average value, and the result of comparing the B component value with the B component whole-screen average value comprises:

and if the difference value between the R component value and the R component whole-screen average value of all the pixels to be tested of the LED screen to be tested is within a preset range, the difference value between the G component value and the G component whole-screen average value is within a preset range, and the difference value between the B component value and the B component whole-screen average value is within a preset range, determining that the low-gray display effect test result of the LED screen to be tested under the preset low-gray parameter is passed.

7. The method according to claim 1, wherein the preset low gray level parameter is preset in a configuration parameter file; the configuration parameter file comprises preset low-gray-scale parameters of at least two low-order gray scales;

correspondingly, determining that the image of the display screen to be tested when the preset low-gray parameter configuration is displayed is the image to be tested, and the method comprises the following steps:

sequentially reading preset low-gray-scale parameters in the configuration parameter file through a sending card;

sending the preset low gray scale parameter to a receiving card connected with a sending card;

controlling the receiving card connected with the display screen to be tested to send and display the preset low gray scale parameters;

and determining the image shot when the display screen to be tested is displayed under the preset low-gray parameter configuration as the image to be tested.

8. The utility model provides a testing arrangement of low grey display effect of display screen which characterized in that includes:

the to-be-tested image determining module is used for determining an image of the to-be-tested display screen when the preset low-gray parameter configuration is displayed as the to-be-tested image;

the pixel value determining module is used for determining the pixel value of each pixel point to be detected in the display screen to be detected according to the pixel value of the image pixel point in the image to be detected based on the pre-established mapping relation between the image pixel point of the image to be detected and the pixel point to be detected of the display screen to be detected;

and the display effect testing module is used for determining a low-gray display effect testing result of the display screen to be tested under the preset low-gray parameter according to a comparison result of the pixel value of each pixel point to be tested and the whole-screen pixel mean value of the display screen to be tested.

9. An electronic device, comprising:

one or more processors;

a storage device for storing one or more programs,

when executed by the one or more processors, cause the one or more processors to implement a method for testing the low gray display effect of the display screen according to any one of claims 1-7.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for testing the low-gray display effect of a display screen according to any one of claims 1 to 7.

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