CN111896233B - Contrast test method, contrast test equipment and storage medium - Google Patents

Abstract

The invention discloses a contrast test method, which comprises the following steps: acquiring an imaging image of a device to be tested; determining a brightness threshold from the imaged image; determining a first pixel region and a second pixel region according to the brightness threshold, wherein a brightness value corresponding to a pixel point in the first pixel region is smaller than or equal to the brightness threshold, and the brightness value corresponding to a pixel point in the second pixel region is larger than the brightness threshold; and determining the contrast of the device to be tested according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area. The invention also discloses contrast test equipment and a computer readable storage medium, which achieve the effect of improving the accuracy of contrast test results.

Description

Contrast test method, contrast test equipment and storage medium

technical field

The invention relates to the technical field of optical testing, in particular to a contrast testing method, a contrast testing device and a computer-readable storage medium.

Background technique

At present, VR (Virtual Reality, virtual display) glasses are gradually developing in the direction of miniaturization. Therefore, many VR glasses adopt a Pancake (thin and light) optical solution that can reduce the thickness and weight of the optical structure in the VR module. Due to the refraction and reflection of light between the lenses of the VR module using the Pancake solution, serious "ghost images" will appear during imaging. At present, the projection industry generally uses the ANSI contrast (ANSI Contrast, a contrast test method) test method to test the contrast of the imaging image. In the ANSI contrast test process, the generally used test chart is a 4×4 black and white grid, and then by calculating the ratio of the average brightness of the central area of the 8 black grids and the 8 white grids in the imaging image, Get the contrast ratio of the product under test. Because the module using the Pancake scheme is affected by "ghosting" during imaging, only calculating the average brightness of the central area cannot reflect the real contrast of the module. This leads to the defect that the contrast test result is inaccurate in the existing test scheme.

The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted as prior art.

Contents of the invention

The main purpose of the present invention is to provide a contrast test method, a contrast test device and a computer-readable storage medium, aiming at improving the accuracy of the contrast test results.

To achieve the above object, the present invention provides a contrast test method, which comprises the following steps:

Obtain an imaging image of the device under test;

determining a brightness threshold based on the imaged image;

Determine the first pixel area and the second pixel area according to the brightness threshold, wherein the brightness value corresponding to the pixel in the first pixel area is less than or equal to the brightness threshold, and the pixel in the second pixel area The corresponding brightness value is greater than the brightness threshold;

The contrast of the device under test is determined according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area.

Optionally, after the step of acquiring the imaging image of the device under test, it also includes:

performing preprocessing on the imaging image, to remove the region of vignetting in the imaging image;

The step of determining the brightness threshold according to the imaging image comprises:

The brightness threshold is determined according to the preprocessed imaging image.

Optionally, the step of determining the brightness threshold according to the imaging image includes:

Acquiring the brightness value of the target pixel in the imaging image;

The brightness threshold is determined according to the brightness value of the target pixel.

Optionally, the step of determining the first pixel area and the second pixel area according to the brightness threshold comprises:

Acquiring the brightness value corresponding to each pixel in the imaging image;

Taking the area where the pixels whose brightness value is less than or equal to the brightness threshold is located as the first pixel area, and using the area where the pixels whose brightness value is greater than the brightness threshold is located as the second pixel area.

Optionally, the step of determining the contrast of the device under test according to the first average brightness value of the first pixel area in the imaging image and the second average brightness value of the second pixel area Previously, also included:

Acquiring the luminance value of each pixel in the first pixel area, and calculating the first average luminance value according to the acquired luminance value;

acquiring the brightness value of each pixel in the second pixel area, and calculating the second average brightness value according to the acquired brightness value.

Optionally, the step of acquiring an imaging image of the device under test includes:

The shooting data of the camera device is acquired, and the shooting data is used as the imaging image.

Optionally, the step of determining the contrast of the device under test according to the first average brightness value of the first pixel area in the imaging image and the second average brightness value of the second pixel area After that, also include:

Obtain the identification mark of the device under test;

The identification is stored in association with the contrast as a contrast test result of the device under test.

Optionally, the identification includes a device model, a device number and/or a device name of the device under test.

In addition, in order to achieve the above object, the present invention also provides a contrast test device, which includes a memory, a processor, and a contrast test program stored in the memory and operable on the processor. When the contrast test program is executed by the processor, the steps of the above-mentioned contrast test method are realized.

In addition, in order to achieve the above object, the present invention also provides a computer-readable storage medium, on which a contrast test program is stored, and when the contrast test program is executed by a processor, the above-mentioned contrast test can be realized. method steps.

A contrast test method, a contrast test device and a computer-readable storage medium proposed by an embodiment of the present invention first acquire an imaging image of the device to be tested, determine a brightness threshold according to the imaging image, and then determine the first pixel according to the brightness threshold area and a second pixel area, wherein the luminance value corresponding to the pixel in the first pixel area is less than or equal to the luminance threshold, and the luminance value corresponding to the pixel in the second pixel area is greater than the brightness threshold, and determine the contrast of the device under test according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area. Since the contrast can be determined according to the average brightness, the phenomenon that the accuracy of the contrast test result is easily affected by objective factors when the contrast is determined according to the single-point brightness is avoided. This has the effect of increasing the accuracy of the contrast test results.

Description of drawings

Fig. 1 is a schematic diagram of the terminal structure of the hardware operating environment involved in the solution of the embodiment of the present invention;

Fig. 2 is a schematic flow chart of an embodiment of the contrast test method of the present invention;

Fig. 3 is a schematic structural diagram of a contrast test system related to an embodiment of the present invention;

Fig. 4 is the schematic diagram of the contrast test chart card that the embodiment of the present invention relates to;

Fig. 5 is a schematic flow chart of another embodiment of the contrast test method of the present invention

Fig. 6 is a schematic flowchart of another embodiment of the contrast testing method of the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Due to the refraction and reflection of light between the lenses of the VR module using the Pancake solution, serious "ghost images" will appear during imaging. At present, the projection industry generally uses the ANSI contrast (ANSI Contrast, a contrast test method) test method to test the contrast of the imaging image. In the ANSI contrast test process, the generally used test chart is a 4×4 black and white grid, and then by calculating the ratio of the average brightness of the central area of the 8 black grids and the 8 white grids in the imaging image, Get the contrast ratio of the product under test. Because the module using the Pancake scheme is affected by "ghosting" during imaging, only calculating the average brightness of the central area cannot reflect the real contrast of the module. This leads to the defect that the contrast test result is inaccurate in the existing test scheme.

In order to solve the above-mentioned defects of related technologies, an embodiment of the present invention proposes a contrast test method, the main solution of which includes the following steps:

Obtain an imaging image of the device under test;

determining a brightness threshold based on the imaged image;

Determine the first pixel area and the second pixel area according to the brightness threshold, wherein the brightness value corresponding to the pixel in the first pixel area is less than or equal to the brightness threshold, and the pixel in the second pixel area The corresponding brightness value is greater than the brightness threshold;

The contrast of the device under test is determined according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area.

Since the contrast can be determined according to the average brightness, the phenomenon that the accuracy of the contrast test result is easily affected by objective factors when the contrast is determined according to the single-point brightness is avoided. This has the effect of increasing the accuracy of the contrast test results.

As shown in FIG. 1 , FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment involved in the solution of the embodiment of the present invention.

The terminal in this embodiment of the present invention may be a terminal device such as a PC.

As shown in FIG. 1 , the terminal may include: a processor 1001 , such as a CPU, a network interface 1004 , a user interface 1003 , a memory 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), a mouse, etc., and the optional user interface 1003 may also include a standard wired interface and a wireless interface. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .

Those skilled in the art can understand that the terminal structure shown in FIG. 1 does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

As shown in FIG. 1 , the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module and a contrast test program.

In the terminal shown in FIG. 1, the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server; the processor 1001 can be used to call the contrast test program stored in the memory 1005, and perform the following operations:

Obtain an imaging image of the device under test;

determining a brightness threshold based on the imaged image;

Determine the first pixel area and the second pixel area according to the brightness threshold, wherein the brightness value corresponding to the pixel in the first pixel area is less than or equal to the brightness threshold, and the pixel in the second pixel area The corresponding brightness value is greater than the brightness threshold;

The contrast of the device under test is determined according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

performing preprocessing on the imaging image, to remove the region of vignetting in the imaging image;

The step of determining the brightness threshold according to the imaging image comprises:

The brightness threshold is determined according to the preprocessed imaging image.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

Acquiring the brightness value of the target pixel in the imaging image;

The brightness threshold is determined according to the brightness value of the target pixel.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

Acquiring the brightness value corresponding to each pixel in the imaging image;

Taking the area where the pixels whose brightness value is less than or equal to the brightness threshold is located as the first pixel area, and using the area where the pixels whose brightness value is greater than the brightness threshold is located as the second pixel area.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

Acquiring the luminance value of each pixel in the first pixel area, and calculating the first average luminance value according to the acquired luminance value;

acquiring the brightness value of each pixel in the second pixel area, and calculating the second average brightness value according to the acquired brightness value.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

The shooting data of the camera device is acquired, and the shooting data is used as the imaging image.

Further, the processor 1001 can call the contrast test program stored in the memory 1005, and also perform the following operations:

Obtain the identification mark of the device under test;

The identification is stored in association with the contrast as a contrast test result of the device under test.

With reference to Fig. 2, in one embodiment of contrast test method of the present invention, described contrast test method comprises the following steps:

Step S10, acquiring an imaging image of the device under test;

Step S20, determining a brightness threshold according to the imaging image;

Step S30. Determine the first pixel area and the second pixel area according to the brightness threshold, wherein the brightness value corresponding to the pixel in the first pixel area is less than or equal to the brightness threshold, and the brightness value in the second pixel area is The brightness value corresponding to the pixel point is greater than the brightness threshold;

Step S40. Determine the contrast of the device under test according to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area.

In the related art, when performing a contrast test, the contrast calculation is generally performed according to the central luminance of each test block in the imaging result of the device under test. Therefore, when there is a "ghost" in the imaging result of the device under test, the contrast obtained from the single-point data is greatly affected by the "ghost" factor, resulting in inaccurate test results. In order to improve the accuracy of the contrast test result, this embodiment proposes a contrast test method.

Before performing the contrast test according to the contrast test method described in this embodiment, a test system can be built first. In order to enable those skilled in the art to better understand the protection scope of the present invention, this embodiment provides a test system building process.

As an optional implementation, referring to FIG. 3 , the above-mentioned test system includes a support table 10 and a test group 20, wherein the test assembly 20 includes an optical module 22 to be tested (that is, the device to be tested, in this embodiment, may be an optical module to be tested) and a display screen 21. The test system further includes a camera device 30 , wherein the camera device 30 is configured to capture the test chart displayed on the display screen 21 through the optical module 22 to be tested, that is, to obtain the imaging result of the optical module 22 to be tested.

The camera device 30 is connected with a control terminal 40B, and the control terminal 40B is configured to determine the contrast test result according to the shooting data captured by the camera. That is, it is used to execute each step of the contrast test method described in the embodiment of the present invention.

Optionally, the above-mentioned display screen 22 can also be connected with a control terminal 40A, and the control terminal 40 connected with the display screen 21 is used to control the display content of the display screen 21 on and off and control the display content of the display screen 21 . For example, the display screen 21 can be controlled to display a contrast test chart. The above-mentioned contrast test chart is a standard contrast test chart, as shown in FIG. 4 , the test chart is composed of black and white test blocks.

Optionally, the test component 20 is placed horizontally, and the camera device 30 is perpendicular to the test component 20 .

Optionally, the test should be carried out in a dark room, and the entire system must be stable to ensure that the test process will not be disturbed.

It should be noted that, in order to improve the test efficiency and reduce the test error when performing the contrast test based on the above test system, it is necessary to adjust the camera to focus on the clearest imaging position before the test starts. And the exposure time of the camera should be set so that the maximum gray value of the white area of the image is within the allowable range, for example, between 215 and 235, so as to avoid the image being too bright or too dark to increase the accuracy of the test results. In addition, the brighter the image brightness, the more obvious the ghost image, and the smaller the contrast result of the final test. Furthermore, the captured images can be observed in real time through the control terminal connected to the camera, and the position of the test components can be adjusted so that the black and white grids in the imaging area are evenly distributed, which is convenient for later data processing.

In this embodiment, the contrast testing equipment (that is, the above-mentioned control terminal connected to the camera device) can obtain the shooting data of the camera device, and use the above shooting data as the imaging image of the device under test (optical module under test).

Specifically, the imaging device is configured as a camera, and the shooting data is image data captured by the camera. Since in the test system, the camera needs to take a contrast test chart through the device under test, therefore, the image data captured by the camera is the imaging data of the test chart by the device under test.

Further, after the imaging image is acquired, the imaging image can be displayed on the display device of the contrast testing device, so that the user can select the target pixel based on the imaging image displayed by the contrast testing device. Then determine the brightness threshold based on the target pixel.

Specifically, the above imaging image may be displayed in the form of a picture on a display device of the contrast testing device. The user can select at least two adjacent pixel points in the displayed picture as the above-mentioned target pixel points. Wherein, when the target pixel is selected by the user, since the imaging image is affected by the imaging characteristics of the optical module, the brightness of the central field of view is the largest. Therefore, you can check the pixels at the junction of the four black and white grids in the center of the image, and select the pixel at the junction of the four black and white grids in the center of the image as the target pixel. When the target pixel is selected and the luminance difference between several target pixels is less than the set value, the luminance value of the pixel with the smaller luminance value among the target pixels can be selected and rounded up as the luminance threshold. Otherwise, prompt the user to reselect the target pixel.

For example, if the difference between the brightness values of adjacent pixels in the black area is less than 20, select the brightness value corresponding to the pixel with a smaller value, and round it up as the brightness threshold, for example, when the brightness value of the adjacent pixel is 27 and 42, choose 30 as the brightness threshold. Otherwise, prompt the user to reselect the target pixel

It can be understood that, the above method for determining the brightness threshold is only used as an implementation solution of this embodiment, and is not used to limit the present invention. For example, the contrast test equipment may first automatically identify the border area of the test block, and then determine the brightness threshold based on the brightness values of the pixels in the border area.

Exemplarily, the contrast test device first determines the above-mentioned boundary area according to an image recognition algorithm, and then acquires the brightness value corresponding to each pixel in the above-mentioned boundary area to calculate the average brightness value of the pixels in the above-mentioned boundary area, and then the above-mentioned boundary area The average luminance value of the pixels in the area is used as the above-mentioned luminance threshold.

Further, after the brightness threshold is determined, the first pixel area and the second pixel area in the imaging image may be determined based on the brightness threshold.

Specifically, after the brightness threshold is determined, the brightness value corresponding to each pixel in the imaging image can be obtained, and then the area where the pixel with the brightness value is less than or equal to the brightness threshold is located is used as In the first pixel area, the area where the pixel points whose luminance value is greater than the luminance threshold is located is used as the second pixel area.

After the above-mentioned first pixel area and the second pixel area are determined, the brightness value corresponding to each pixel point in the first pixel area can be obtained, and then the above-mentioned The first average brightness value of the pixels in the first pixel area. And acquire the brightness value corresponding to each pixel in the second pixel area, and then calculate the first average brightness value of the pixels in the second pixel area according to the acquired brightness value corresponding to each pixel in the second pixel area .

After determining the first average brightness value and the second average brightness value, the ratio of the second average brightness value to the first average brightness value can be used as the contrast test result of the device under test, that is, the contrast ratio corresponding to the device under test is the ratio of the second average brightness value to the first average brightness value.

It can be understood that, since the test chart is composed of black and white test blocks, in the above-mentioned imaging image, the first pixel area determined according to the brightness threshold is composed of a plurality of pixels scattered at different positions in the imaging image. Similarly, the above-mentioned second pixel area is composed of a plurality of second sub-pixel areas scattered at different positions in the imaging image. Therefore, as an optional implementation solution, the sub-contrast may be calculated according to the average brightness values of pixels corresponding to two adjacent first sub-pixel regions and second sub-pixel regions. Thereby, multiple sub-contrasts can be obtained. Then, the average value of the above multiple sub-contrast ratios is used as the contrast ratio of the device under test.

In the technical solution disclosed in this embodiment, the imaging image of the device under test is obtained first, the brightness threshold is determined according to the imaging image, and then the first pixel area and the second pixel area are determined according to the brightness threshold, wherein the first The luminance value corresponding to the pixel in a pixel area is less than or equal to the luminance threshold, the luminance value corresponding to the pixel in the second pixel area is greater than the luminance threshold, and according to the corresponding The first average brightness value of the second pixel area and the second average brightness value corresponding to the second pixel area determine the contrast of the device under test. Since the contrast can be determined according to the average brightness, the phenomenon that the accuracy of the contrast test result is easily affected by objective factors when the contrast is determined according to the single-point brightness is avoided. This has the effect of increasing the accuracy of the contrast test results.

Referring to FIG. 5, based on the above embodiment, in another embodiment, after the above step S10, further includes:

Step S50, performing preprocessing on the imaging image, so as to remove the area with vignetting in the imaging image;

Above-mentioned step S20 comprises:

Step S21. Determine the brightness threshold according to the preprocessed imaging image.

In this embodiment, after the imaging image of the device under test is acquired, preprocessing may be performed first.

Specifically, after the imaging image of the device under test is acquired, the imaging image can be displayed on the display interface of the contrast testing equipment, so that the user can remove the imaging image by cutting or other means through the image processing software loaded on the contrast testing equipment. The vignetting area in .

Or the contrast testing device is provided with an image recognition function, which can recognize the vignetting region in the imaging image based on the image recognition function of the contrast testing device itself, so as to automatically cut out the vignetting region in the imaging image.

Or the contrast test device can communicate with the server, and call the remote image processing function through the above-mentioned image processing interface of the server, and remove the vignetting area in the imaging image through the remote image processing function.

Or the contrast test equipment can first send the above-mentioned imaging image to the server. After the server receives the imaging image, it can remove the vignetting area in the above-mentioned imaging image through the image function of the local end or other end, and then the image after removing the vignetting area The images are fed back to the contrast test equipment described above.

Further, after pre-storing the imaging image, the brightness threshold may be determined according to the pre-processed imaging image.

In this embodiment, after the imaging image of the device under test is acquired, preprocessing may be performed first, thus achieving the effect of improving the accuracy of the contrast test result.

Optionally, referring to FIG. 6 , based on any of the above embodiments, in another embodiment, after the above step S40, further includes:

Step S60, acquiring the identification mark of the device under test;

Step S70, storing the identification mark in association with the contrast as a contrast test result of the device under test.

In this embodiment, before the contrast test starts, the user may first input the identification of the device to be tested, or the contrast testing device may determine the identification of the device to be tested through a label provided on the device to be tested.

After the identification is obtained, the identification may be stored in association with the contrast as a contrast test result of the device under test.

It should be noted that the identification includes a device model, a device number and/or a device name of the device under test.

In this embodiment, the identification mark and the contrast of the device under test can be automatically stored in association, so that manual statistics of the results are not required, thus achieving the effect of simplifying the steps of the contrast test.

In addition, an embodiment of the present invention also proposes a contrast test device, the contrast test device includes a memory, a processor, and a contrast test program stored in the memory and operable on the processor, the contrast test program When executed by the processor, the steps of the contrast testing method described in the above embodiments are realized.

In addition, the embodiment of the present invention also proposes a computer-readable storage medium, the computer-readable storage medium stores a contrast test program, and when the contrast test program is executed by a processor, the contrast test described in the above embodiments is realized. method steps.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product in essence or in other words, the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above. , magnetic disk, optical disk), including several instructions to make a terminal device (which may be a PC, etc.) execute the methods described in various embodiments of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (6)

1. A contrast test method, characterized in that, the contrast test method is applied to a test optical module, comprising a test system, the test system comprising a support platform, a test assembly, a camera, and the test assembly comprises a device to be tested and a display screen, the camera device is set to shoot the test chart shown on the display screen through the device under test, and the contrast test method includes the following steps: Obtain an imaging image of the device under test; performing preprocessing on the imaging image, to remove the region of vignetting in the imaging image; determining a brightness threshold according to the preprocessed imaging image; Determine the first pixel area and the second pixel area according to the brightness threshold, wherein the brightness value corresponding to the pixel in the first pixel area is less than or equal to the brightness threshold, and the pixel in the second pixel area The corresponding brightness value is greater than the brightness threshold; According to the first average brightness value corresponding to the first pixel area and the second average brightness value corresponding to the second pixel area, determine the ratio of the second average brightness value to the first average brightness value is the contrast ratio of the device under test; Before the step of determining the contrast of the device under test according to the first average brightness value of the first pixel area in the imaging image and the second average brightness value of the second pixel area, the method further includes : Acquiring the luminance value of each pixel in the first pixel area, and calculating the first average luminance value according to the acquired luminance value; Acquiring the luminance value of each pixel in the second pixel area, and calculating the second average luminance value according to the acquired luminance value; The step of determining the brightness threshold according to the preprocessed image includes: Acquiring the luminance value of the target pixel in the preprocessed imaging image; determining the brightness threshold according to the brightness value of the target pixel; The step of determining the first pixel area and the second pixel area according to the brightness threshold comprises: Acquiring the brightness value corresponding to each pixel in the imaging image; Taking the area where the pixels whose brightness value is less than or equal to the brightness threshold is located as the first pixel area, and using the area where the pixels whose brightness value is greater than the brightness threshold is located as the second pixel area. 2. the contrast test method as claimed in claim 1, is characterized in that, the step of described obtaining the imaging image of equipment under test comprises: The shooting data of the camera device is acquired, and the shooting data is used as the imaging image. 3. The contrast test method according to claim 1, wherein the first average brightness value of the first pixel area in the imaging image and the second average brightness value of the second pixel area in the imaging image are characterized in that: The brightness value, after the step of determining the contrast of the device under test, further includes: Obtain the identification mark of the device under test; The identification is stored in association with the contrast as a contrast test result of the device under test. 4. The contrast test method according to claim 3, wherein the identification mark comprises a device model, a device number and/or a device name of the device under test. 5. A kind of contrast test equipment, it is characterized in that, described contrast test equipment comprises: memory, processor and are stored on described memory and the contrast test program that can run on described processor, described contrast test program is controlled by The processor realizes the steps of the contrast testing method according to any one of claims 1 to 4 when executed. 6. A computer-readable storage medium, characterized in that, a contrast test program is stored on the computer-readable storage medium, and when the contrast test program is executed by a processor, it is realized as described in any one of claims 1 to 4. The steps of the contrast test method described above.

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