CN108091288B - Display screen uniformity testing method, terminal and computer readable storage medium - Google Patents
Display screen uniformity testing method, terminal and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a method, a terminal and a computer readable storage medium for testing the uniformity of a display screen, wherein a display state picture of a screen to be tested is obtained, and an effective area of the display state picture is obtained and is used as a test picture corresponding to the screen to be tested; acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture; and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result. The test result of the invention can accurately reflect the integral uniformity of the screen to be tested; meanwhile, the test of the invention can be completed without technical personnel to carry out related technical operation, thereby avoiding the test deviation caused by artificial factors, improving the accuracy of the test result, being beneficial to reducing the time consumed by the test and improving the efficiency of uniformity test.
Description
Technical Field
The invention relates to the technical field of display screen testing, in particular to a method and a terminal for testing the uniformity of a display screen and a computer readable storage medium.
Background
The brightness uniformity of the display screen reflects the quality of the display screen, and if the display screen is uniform, the image display effect is better; if the image is not uniform, the display effect is poor, and various traces appear in the displayed image.
The traditional method for testing the uniformity of the display screen is to use the combination of human vision and a luminance meter to judge the uniformity. This method utilizes subjective feeling of a human, and easily influences the evaluation result due to the difference of the subjective feeling. Another common test method is a nine-point test method, i.e., a result of calculating uniformity by using a correlation formula according to the brightness of 8 surrounding pixel points and a central pixel point, and the result is used as the final brightness uniformity evaluation. However, when the nine-point test method is adopted, the subsequent calculation results are affected by different pixel point position selections, and the test results are inaccurate when the point selection positions are improper. Moreover, the existing televisions are all curved surface televisions, the existing testing method aims at the rectangular television with a regular shape, and the measuring method for the curved surface television also utilizes the measuring method for the rectangular television with a regular shape, so that the evaluation of the uniformity result is influenced.
Disclosure of Invention
The invention mainly aims to provide a method, a terminal and a computer readable storage medium for testing the uniformity of a display screen, and aims to improve the accuracy of a uniformity test result of a curved surface display screen.
In order to achieve the above object, the present invention provides a method for testing uniformity of a display screen, the method comprising the following steps:
acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested;
acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture;
and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result.
Optionally, the step of obtaining the display state picture of the screen to be tested and obtaining the effective area of the display state picture as the test picture corresponding to the screen to be tested specifically includes:
when the white picture is played on the screen to be tested, shooting the screen to be tested to obtain a full white picture of the screen to be tested;
when the checkerboard picture is played on the screen to be tested, shooting the screen to be tested to obtain the checkerboard picture of the screen to be tested;
and acquiring an effective area in the full white field picture according to the checkerboard picture and a preset algorithm rule to be used as a test picture corresponding to the screen to be tested.
Optionally, the step of obtaining a preset sample picture and calculating a sample mean value of pixel values corresponding to the sample picture specifically includes:
acquiring a sample picture of a reference screen, and acquiring a sample pixel value corresponding to each pixel point in the sample picture;
and calculating the sample mean value of the sample pixel value corresponding to each pixel point according to a preset calculation rule.
Optionally, the step of obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to the comparison result specifically includes:
obtaining a test pixel value corresponding to each pixel point in the test picture, comparing the test pixel value with the sample mean value, and judging whether a pixel point with the test pixel value larger than the sample mean value exists;
and when the pixel point with the test pixel value larger than the sample mean value exists, judging that the uniformity of the screen to be tested does not meet the test requirement.
Optionally, after the step of determining that the uniformity of the screen to be tested does not meet the testing requirement when there is a pixel point whose test pixel value is greater than the sample mean, the method further includes:
and acquiring pixel points of which the test pixel values are larger than the sample mean value as peak pixel points of uneven areas in the test picture, and acquiring the coordinate positions of the peak pixel points.
Optionally, the step of obtaining a preset sample picture and calculating a sample mean value of pixel values corresponding to the sample picture specifically includes:
acquiring a sample picture of the reference screen, equally dividing the sample picture into regional sample pictures according to a preset dividing rule, and acquiring regional sample pixel values corresponding to all pixel points in all the regional sample pictures;
and calculating the area sample mean value corresponding to each area sample pixel value according to a preset calculation rule.
Optionally, the step of obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to the comparison result specifically includes:
equally dividing the test picture into area test pictures according to a preset dividing rule, and overlapping the area test pictures and corresponding area sample pictures to obtain test overlapped pictures corresponding to all areas;
acquiring the superposed pixel value of each pixel point in the test superposed picture, and judging whether pixel points with superposed pixel values smaller than the area sample mean value exist or not according to the corresponding area sample mean value;
and when the pixel points with the superposed pixel values smaller than the area sample mean value exist, acquiring the pixel points with the superposed pixel values smaller than the area sample mean value as valley pixel points of the uneven area in the test picture, and acquiring the coordinate positions of the valley pixel points.
Optionally, the method for testing the uniformity of the display screen further includes the following steps:
and determining the position area of the uneven area in the test picture according to the coordinate positions of the valley pixel points and the peak pixel points.
In addition, in order to achieve the above object, the present invention further provides a test terminal for testing uniformity of a display screen, wherein the test terminal comprises a processor, a memory, and a test program stored on the memory and executable by the processor, wherein when the test program is executed by the processor, the steps of the method for testing uniformity of a display screen as described above are implemented.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, having a test program stored thereon, wherein the test program, when executed by a processor, implements the steps of the method for testing uniformity of a display screen as described above.
The invention provides a method, a terminal and a computer readable storage medium for testing the uniformity of a display screen, which are characterized in that a display state picture of a screen to be tested is obtained, and an effective area of the display state picture is obtained and is used as a test picture corresponding to the screen to be tested; acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture; and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result. Through the mode, the effective area of the screen to be tested is obtained and used as the test picture of the screen to be tested, the test pixel value corresponding to the test picture is compared with the sample mean value corresponding to the preset sample picture, and therefore the uniformity of the screen to be tested is determined according to the comparison result. The test result of the invention can accurately reflect the integral uniformity of the screen to be tested; meanwhile, the test of the invention can be completed without technical personnel to carry out related technical operation, thereby avoiding the test deviation caused by artificial factors, improving the accuracy of the test result, being beneficial to reducing the time consumed by the test and improving the efficiency of uniformity test.
Drawings
FIG. 1 is a schematic diagram of a hardware structure of a display screen uniformity testing terminal according to an embodiment of the present invention;
FIG. 2 is a schematic flowchart of a first embodiment of a method for testing uniformity of a display panel according to the present invention;
FIG. 3 is a schematic diagram of a full white field picture in a first embodiment of a method for testing uniformity of a display panel according to the present invention;
FIG. 4 is a schematic view of checkerboard pictures in the first embodiment of the method for testing uniformity of a display screen according to the present invention;
FIG. 5 is a schematic diagram of a test picture in a first embodiment of a method for testing uniformity of a display screen according to the present invention;
FIG. 6 is a schematic diagram of a first detailed flowchart of step S30 in FIG. 2;
FIG. 7 is a schematic diagram of a second detailed flowchart of step S30 in FIG. 2;
FIG. 8 is a schematic diagram of a sample picture of the area of the sample picture of FIG. 2 after being equally divided;
FIG. 9 is a schematic diagram of the area test picture after the test pictures in FIG. 2 are evenly divided;
fig. 10 is a schematic diagram of a test overlay image obtained by overlaying the area test image and the corresponding area sample image in fig. 2.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main idea of the embodiment scheme of the invention is as follows: acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested; acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture; and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result.
The method for testing the uniformity of the display screen is mainly applied to a terminal for testing the uniformity of the display screen, and the terminal can be realized in various ways. For example, the terminal may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palm computer, and the like, and a fixed terminal such as a smart tv, a PC terminal, and the like.
While the following description will be described with a PC terminal as a test terminal for display screen uniformity, those skilled in the art will appreciate that the configuration according to the embodiment of the present invention can be applied to other types of terminals besides elements particularly for mobile purposes.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a test terminal for uniformity of a display screen according to an embodiment of the present invention. In this embodiment of the present invention, the terminal for testing uniformity of a display screen may include a processor 1001 (e.g., a CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface); the memory 1005 may be a high-speed RAM memory, or may be a non-volatile memory (e.g., a magnetic disk memory), and optionally, the memory 1005 may be a storage device independent of the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts brightness of the display screen according to brightness of ambient light, and a proximity sensor that turns off the display screen and/or the backlight according to a distance between the photosensitive device and the reference object. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the terminal is stationary, and can be used for applications of terminal gestures (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; of course, the terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal hardware configuration shown in fig. 1 does not constitute a limitation of the test terminal for display screen uniformity, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
With continued reference to fig. 1, the memory 1005 of fig. 1, which is one type of computer-readable storage medium, may include an operating system, a network communication module, and a test program.
In fig. 1, the network communication module is mainly used for connecting to a server and performing data communication with the server; and the processor 1001 may call the test program stored in the memory 1005 and perform the following operations:
acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested;
acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture;
and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result.
Further, the display status pictures include a full white field picture and a checkerboard picture, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
when the white picture is played on the screen to be tested, shooting the screen to be tested to obtain a full white picture of the screen to be tested;
when the checkerboard picture is played on the screen to be tested, shooting the screen to be tested to obtain the checkerboard picture of the screen to be tested;
and acquiring an effective area in the full white field picture according to the checkerboard picture and a preset algorithm rule to be used as a test picture corresponding to the screen to be tested.
Further, the processor 1001 may also call a test program stored in the memory 1005 and perform the following operations:
acquiring a sample picture of a reference screen, and acquiring a sample pixel value corresponding to each pixel point in the sample picture;
and calculating the sample mean value of the sample pixel value corresponding to each pixel point according to a preset calculation rule.
Further, the preset reference data includes reference low-pass pixel data and reference high-pass pixel data, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
obtaining a test pixel value corresponding to each pixel point in the test picture, comparing the test pixel value with the sample mean value, and judging whether a pixel point with the test pixel value larger than the sample mean value exists;
and when the pixel point with the test pixel value larger than the sample mean value exists, judging that the uniformity of the screen to be tested does not meet the test requirement.
Further, the preset reference data includes reference low-pass pixel data and reference high-pass pixel data, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
and acquiring pixel points of which the test pixel values are larger than the sample mean value as peak pixel points of uneven areas in the test picture, and acquiring the coordinate positions of the peak pixel points.
Further, the preset reference data includes reference low-pass pixel data and reference high-pass pixel data, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
acquiring a sample picture of the reference screen, equally dividing the sample picture into regional sample pictures according to a preset dividing rule, and acquiring regional sample pixel values corresponding to all pixel points in all the regional sample pictures;
and calculating the area sample mean value corresponding to each area sample pixel value according to a preset calculation rule.
Further, the preset reference data includes reference low-pass pixel data and reference high-pass pixel data, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
equally dividing the test picture into area test pictures according to a preset dividing rule, and overlapping the area test pictures and corresponding area sample pictures to obtain test overlapped pictures corresponding to all areas;
acquiring the superposed pixel value of each pixel point in the test superposed picture, and judging whether pixel points with superposed pixel values smaller than the area sample mean value exist or not according to the corresponding area sample mean value;
and when the pixel points with the superposed pixel values smaller than the area sample mean value exist, acquiring the pixel points with the superposed pixel values smaller than the area sample mean value as valley pixel points of the uneven area in the test picture, and acquiring the coordinate positions of the valley pixel points.
Further, the preset reference data includes reference low-pass pixel data and reference high-pass pixel data, and the processor 1001 may further call a test program stored in the memory 1005, and perform the following operations:
and determining the position area of the uneven area in the test picture according to the coordinate positions of the valley pixel points and the peak pixel points.
Based on the hardware structure of the test terminal for the uniformity of the display screen, the embodiments of the test method for the uniformity of the display screen are provided.
The invention provides a method for testing the uniformity of a display screen.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a method for testing uniformity of a display screen according to the present invention.
In this embodiment, the test method includes the following steps:
step S10, acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested;
the brightness uniformity of the display screen reflects the quality of the display screen, and if the display screen is uniform, the image display effect is better; if the image is not uniform, the display effect is poor, and various traces appear in the displayed image. The traditional method for testing the uniformity of the display screen is to use the combination of human vision and a luminance meter to judge the uniformity. This method utilizes subjective feeling of a human, and easily influences the evaluation result due to the difference of the subjective feeling. Another common test method is a nine-point test method, i.e., a result of calculating uniformity by using a correlation formula according to the brightness of 8 surrounding pixel points and a central pixel point, and the result is used as the final brightness uniformity evaluation. However, when the nine-point test method is adopted, the subsequent calculation results are affected by different pixel point position selections, and the test results are inaccurate when the point selection positions are improper. Moreover, the existing televisions are all curved surface televisions, the existing testing method aims at the rectangular television with a regular shape, and the measuring method for the curved surface television also utilizes the measuring method for the rectangular television with a regular shape, so that the evaluation of the uniformity result is influenced.
Based on the above problems, the present embodiment provides a method for testing uniformity of a display screen, in which a testing process is not interfered by human factors, and meanwhile, the method performs an analysis test on the whole display screen, so that an obtained testing result is more accurate. It should be noted that the embodiment can be used for the uniformity test of the curved display screen and the regular display screen.
Specifically, in this embodiment, the display screen for testing the uniformity may be referred to as a screen to be tested. The screen to be measured is the screen to be measured with different uniformity. And if a plurality of screens to be tested exist, shooting pictures of different screens to be tested for testing. When the uniformity test is needed, the screen to be tested can display the state picture. In order to further improve the picture display accuracy, the effective area part of the display state picture can be further acquired according to a preset extraction rule and used as a test picture corresponding to the screen to be tested. As shown in fig. 3, since the uniformity of the display screen is mainly the attribute in terms of brightness, the display state picture is a full white picture (i.e., the full white picture is played in the screen to be tested). When the screen to be tested plays the full white picture, the full white picture currently displayed on the screen to be tested is shot through the image acquisition equipment. As shown in fig. 4, the to-be-detected screen is then played with a checkerboard picture for calibration, and the checkerboard picture currently displayed on the to-be-detected screen is taken by the image capture device. As shown in fig. 5, then, according to the checkerboard picture and the Zhang-Yongyou image algorithm for calibration, an effective area portion in the full white field picture, that is, an effective white field picture of the curved display screen, is captured. The reason for acquiring the partial picture of the effective area of the full white field picture according to the checkerboard picture is that the display picture of the curved surface display screen is a non-straight surface, so that calibration is performed through black and white intersection points in the checkerboard. Wherein the image acquisition device can be a video camera, a still camera or the like. The image acquisition equipment can be a functional device equipped by the test terminal, and can also be functional equipment externally connected with the test terminal; for example, in this embodiment, a camera with a resolution of 2120 × 3800 may be used for shooting to obtain a clearer test picture, so as to improve accuracy of the test result. In order to fully analyze the average linearity of the screen to be tested, the test picture should include the complete display screen.
Step S20, acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture;
in this embodiment, when the test picture of the screen to be tested is obtained, the preset sample picture corresponding to the reference screen is further obtained. Wherein, the reference screen is a display screen with good uniformity effect. Carrying out Fourier transform on the sample picture to obtain a frequency domain numerical value of the sample picture, then obtaining a pixel value and a pixel point coordinate corresponding to each pixel point in the sample picture according to the frequency domain numerical value, recording the sample picture as sample, and then obtaining a formula according to the formula
And calculating the average value of the pixel values of all the pixel points, and recording the average value as a sample average value.
And step S30, obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining the test result of the uniformity of the screen to be tested according to the comparison result.
In this embodiment, when the sample mean value corresponding to the sample picture of the reference screen is obtained, the test picture corresponding to the screen to be tested is further obtained. And then obtaining each test pixel value corresponding to each test pixel point in the test picture, comparing each test pixel value with the sample mean value, and judging the test result of the uniformity of the screen to be tested according to the compared result. If the test pixel points with the test pixel values larger than the sample mean value exist, the test pixel points with the brightness exceeding the brightness of the sample picture exist in the test picture, namely the uniformity of the screen to be tested is poor, and the requirement is not met.
The embodiment provides a method, a terminal and a computer readable storage medium for testing the uniformity of a display screen, which are implemented by acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested; acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture; and obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to a comparison result. Through the mode, the effective area of the screen to be tested is obtained and used as the test picture of the screen to be tested, the test pixel value corresponding to the test picture is compared with the sample mean value corresponding to the preset sample picture, and therefore the uniformity of the screen to be tested is determined according to the comparison result. The test result of the invention can accurately reflect the integral uniformity of the screen to be tested; meanwhile, the test of the invention can be completed without technical personnel to carry out related technical operation, thereby avoiding the test deviation caused by artificial factors, improving the accuracy of the test result, being beneficial to reducing the time consumed by the test and improving the efficiency of uniformity test.
Referring to fig. 6, fig. 6 is a schematic diagram of a first detailed flow of step S30 in fig. 2.
Based on the embodiment shown in fig. 2, step S30 specifically includes:
step S31, obtaining a test pixel value corresponding to each pixel point in the test picture, comparing the test pixel value with the sample mean value, and judging whether a pixel point with the test pixel value larger than the sample mean value exists;
in this embodiment, a test picture corresponding to the screen to be tested is obtained. And then obtaining each test pixel value corresponding to each test pixel point in the test picture, comparing each test pixel value with the sample mean value, and judging the test result of the uniformity of the screen to be tested according to the compared result. If the test pixel points with the test pixel values larger than the sample mean value exist, the test pixel points with the brightness exceeding the brightness of the sample picture exist in the test picture, namely the uniformity of the screen to be tested is poor, and the requirement is not met. If the test pixel point with the test pixel value larger than the sample mean value does not exist, that is, the test pixel point with the brightness exceeding the brightness of the sample picture does not exist in the screen to be tested, the screen to be tested can be judged to meet the requirement of uniformity, or whether the test pixel point with the brightness smaller than the sample mean value corresponding to the sample picture exists in the screen to be tested or not can be further determined.
And step S32, when the pixel point with the test pixel value larger than the sample mean value exists, judging that the uniformity of the screen to be tested does not meet the test requirement.
In this embodiment, if the test pixel point exists, it indicates that the brightness of the test pixel point exceeds the brightness of the sample picture, that is, it indicates that the uniformity of the screen to be tested is poor and the requirement is not met.
Step S33, obtaining the pixel points of which the test pixel values are larger than the sample mean value as the peak pixel points of the uneven area in the test picture, and obtaining the coordinate positions of the peak pixel points.
In this embodiment, if there is a test pixel point whose test pixel is only larger than the sample mean value, the luminance of the test pixel point exceeds the sample picture luminance mean value, the coordinate position of the test pixel point is obtained as a peak pixel point of an uneven area in the test picture, and the coordinate position of the peak pixel point is recorded. In the embodiment, if there are a plurality of peak pixels, the position coordinates of the plurality of peak pixels are connected to form a smooth partial sine or cosine curve.
Referring to fig. 7, fig. 7 is a schematic diagram of a second detailed flow of step S30 in fig. 2.
Based on the above-described embodiment shown in fig. 2, step S20 includes:
step S21, obtaining a sample picture of the reference screen, equally dividing the sample picture into area sample pictures according to a preset dividing rule, and obtaining area sample pixel values corresponding to each pixel point in each area sample picture;
as shown in fig. 8, a sample picture of the reference screen is obtained, and the sample picture is equally divided, for example, equally divided into 2 × 2 equally divided regions, so as to obtain a kernel function for calibrating movement. In the embodiment after obtaining the equal division, the equal division may be further equally divided into 3 × 3 equal division regions and the like. And recording the partitioned picture as a region sample picture, and then obtaining a region sample pixel value corresponding to each sample pixel point in each region sample picture.
Step S22, calculating a region sample mean value corresponding to each region sample pixel value according to a preset calculation rule.
In this embodiment, when obtaining the area sample pixel value corresponding to each sample pixel point in each area sample picture, according to a preset calculation rule, for example, according to a formula
And calculating the sample average value corresponding to each area sample pixel value, and recording as the area sample average value.
Based on the above-described embodiment shown in fig. 2, step S30 includes:
step 34, equally dividing the test picture into area test pictures according to a preset dividing rule, and overlapping the area test pictures and corresponding area sample pictures to obtain test overlapped pictures corresponding to each area;
as shown in fig. 9, in this embodiment, the test picture is equally divided into regions and marked as a region test picture, as in the above division rule of the sample picture. As shown in fig. 10, then, overlapping the area sample picture and the corresponding area test picture, and in the process of overlapping, ensuring that the display screen area of the area sample picture and the white area of the area test picture are overlapped; and when the superposition processing is finished, obtaining the test superposition picture corresponding to the test picture of each area.
Step S35, acquiring the superposed pixel value of each pixel point in the test superposed picture, and judging whether a pixel point with the superposed pixel value smaller than the area sample mean value exists according to the corresponding area sample mean value;
in this embodiment, the superimposed pixel value of each superimposed pixel in each test superimposed picture is obtained according to the above method, and then whether there is a superimposed pixel having a superimposed pixel value smaller than the area sample mean is determined according to the corresponding area sample mean.
Step S36, when there is a pixel point whose superimposed pixel value is smaller than the area sample mean value, acquiring the pixel point whose superimposed pixel value is smaller than the area sample mean value as a valley pixel point of an uneven area in the test picture, and acquiring the coordinate position of the valley pixel point.
In this embodiment, if there is a superimposed pixel point whose superimposed pixel value is smaller than the area sample mean value, the superimposed pixel point whose superimposed pixel value is smaller than the area sample mean value is obtained and recorded as a valley pixel point of an uneven area in the test picture, and the fixed pixel point is obtained as a coordinate position. In the embodiment, if there are a plurality of peak pixels, the position coordinates of the plurality of peak pixels are connected to form a smooth partial sine or cosine curve.
Further, after step S30, the method further includes
And step S40, determining the position area of the uneven area in the test picture according to the coordinate position of the valley pixel point and the coordinate position of the peak pixel point.
In this embodiment, after the coordinate positions of the valley pixel points and the peak pixel points are obtained, the position area of the uneven area in the test picture is further determined according to the coordinate positions of the valley pixel points and the peak pixel points, and then corresponding operations can be performed as needed. Such as mura image compensation for the non-uniform areas.
Furthermore, the invention also provides a test terminal for the uniformity of the display screen.
The test terminal for the uniformity of the display screen comprises a processor, a memory and a test program which is stored on the memory and can be executed by the processor, wherein when the test program is executed by the processor, the steps of the test method for the uniformity of the display screen are realized.
The method for implementing the test program when executed can refer to the embodiments of the method for testing the uniformity of the display screen of the present invention, and details are not repeated herein.
Further, the present invention also provides a computer readable storage medium.
The computer readable storage medium of the present invention stores a test program, wherein the test program, when executed by a processor, implements the steps of the method for testing uniformity of a display screen as described above.
The method for implementing the test program when executed can refer to the embodiments of the method for testing the uniformity of the display screen of the present invention, and details are not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A method for testing the uniformity of a display screen is characterized by comprising the following steps:
acquiring a display state picture of a screen to be tested, and acquiring an effective area of the display state picture as a test picture corresponding to the screen to be tested;
acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture;
obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to the comparison result;
the steps of obtaining a test pixel value corresponding to the test picture, comparing the test pixel value with the sample mean value, and determining a test result of the uniformity of the screen to be tested according to the comparison result specifically include:
obtaining a test pixel value corresponding to each pixel point in the test picture, comparing the test pixel value with the sample mean value, and judging whether a pixel point with the test pixel value larger than the sample mean value exists;
when the pixel point with the test pixel value larger than the sample mean value exists, judging that the uniformity of the screen to be tested does not meet the test requirement;
acquiring pixel points of which the test pixel values are larger than the sample mean value, taking the pixel points as peak pixel points of uneven areas in the test picture, and acquiring the coordinate positions of the peak pixel points;
equally dividing the test picture into area test pictures according to a preset dividing rule, and overlapping the area test pictures and corresponding area sample pictures to obtain test overlapped pictures corresponding to all areas;
acquiring the superposed pixel value of each pixel point in the test superposed picture, and judging whether pixel points with superposed pixel values smaller than the area sample mean value exist or not according to the corresponding area sample mean value;
when a pixel point with a superimposed pixel value smaller than the area sample mean value exists, acquiring a pixel point with the superimposed pixel value smaller than the area sample mean value as a valley pixel point of an uneven area in the test picture, and acquiring a coordinate position of the valley pixel point;
and determining the position area of the uneven area in the test picture according to the coordinate positions of the valley pixel points and the peak pixel points.
2. The testing method according to claim 1, wherein the display state pictures include a full white field picture and a checkerboard picture, the step of obtaining the display state picture of the screen to be tested and obtaining the effective area of the display state picture as the test picture corresponding to the screen to be tested specifically includes:
when the white picture is played on the screen to be tested, shooting the screen to be tested to obtain a full white picture of the screen to be tested;
when the checkerboard picture is played on the screen to be tested, shooting the screen to be tested to obtain the checkerboard picture of the screen to be tested;
and acquiring an effective area in the full white field picture according to the checkerboard picture and a preset algorithm rule to be used as a test picture corresponding to the screen to be tested.
3. The testing method according to claim 1, wherein the step of obtaining a preset sample picture and calculating a sample mean value of pixel values corresponding to the sample picture specifically comprises:
acquiring a sample picture of a reference screen, and acquiring a sample pixel value corresponding to each pixel point in the sample picture;
and calculating the sample mean value of the sample pixel value corresponding to each pixel point according to a preset calculation rule.
4. The testing method according to claim 1, wherein the step of obtaining a preset sample picture and calculating a sample mean value of pixel values corresponding to the sample picture specifically comprises:
the method comprises the steps of obtaining a sample picture of a reference screen, equally dividing the sample picture into regional sample pictures according to a preset dividing rule, and obtaining regional sample pixel values corresponding to all pixel points in all the regional sample pictures;
and calculating the area sample mean value corresponding to each area sample pixel value according to a preset calculation rule.
5. A test terminal for display screen uniformity, characterized in that the test terminal comprises a processor, a memory, and a test program stored on the memory and executable by the processor, wherein the test program, when executed by the processor, implements the steps of the test method according to any one of claims 1 to 4.
6. A computer-readable storage medium, having a test program stored thereon, wherein the test program, when executed by a processor, implements the steps of the test method of any one of claims 1 to 4.
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| TWI660165B (en) * | 2018-05-14 | 2019-05-21 | 和碩聯合科技股份有限公司 | Testing system and testing method |
| TWI663577B (en) | 2018-06-04 | 2019-06-21 | 宏碁股份有限公司 | Demura system for non-planar screen |
| CN110581943B (en) * | 2018-06-11 | 2021-04-02 | 宏碁股份有限公司 | Color mura defect compensation system for non-planar screens |
| CN109949728B (en) * | 2019-04-24 | 2022-10-11 | 苏州华兴源创科技股份有限公司 | Detection apparatus for display panel |
| CN110321257A (en) * | 2019-05-22 | 2019-10-11 | 深圳壹账通智能科技有限公司 | Abnormity screen compatibility test method, device, computer equipment and storage medium |
| CN110855898B (en) * | 2020-01-14 | 2020-07-31 | 武汉精立电子技术有限公司 | Image acquisition method and device |
| CN111681201B (en) * | 2020-04-20 | 2023-06-23 | 深圳市鸿富瀚科技股份有限公司 | Image processing method, device, computer equipment and storage medium |
| CN111754906B (en) * | 2020-06-30 | 2022-09-27 | 上海天马微电子有限公司 | Method for detecting brightness uniformity of curved surface display screen |
| CN112543318B (en) * | 2020-12-01 | 2023-02-17 | 深圳英伦科技股份有限公司 | 3D display screen compensation method, system and computer readable storage medium |
| CN114112324B (en) * | 2021-11-09 | 2024-04-26 | 合肥维信诺科技有限公司 | Display screen brightness uniformity testing method and testing device |
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