CN119169946A - A method, device, medium and program product for testing electronic paper display effect - Google Patents
A method, device, medium and program product for testing electronic paper display effect Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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Abstract
A method, a device, a medium and a program product for testing the display effect of electronic paper relate to the control field of static display devices, and the method comprises the steps of sending a test instruction to control electronic paper and electronic paper to be tested, so that the control electronic paper and the electronic paper to be tested display the same test image; the method comprises the steps of comparing electronic paper with electronic paper to be tested in the same test environment, obtaining a test reference image of the comparison electronic paper and a target test image of the electronic paper to be tested, determining difference characteristic pixels on the target test image, which are different from the test reference image, calculating a display deviation value of the electronic paper to be tested according to the difference characteristic pixels, and binding a test passing mark of the test image for the electronic paper to be tested when the display deviation value is lower than a display deviation threshold value. By implementing the application, the test efficiency of the electronic paper can be improved.
Description
Technical Field
The present application relates to the field of control of static display devices, and in particular, to a method, a device, a medium, and a program product for testing a display effect of electronic paper.
Background
With the popularization of electronic reading devices, electronic paper display technology is widely used due to the papery display effect and low power consumption characteristics. In the production process of electronic paper products, the testing and quality control of display effects are key links for ensuring the consistency of the products.
In the related art, the test of the display effect of electronic paper is generally measured by using a professional optical instrument. According to the testing method, a plurality of testing points of a display screen are sampled and measured through devices such as a color difference meter or a spectrophotometer, and parameter data such as brightness, contrast, chromaticity and the like are obtained. And the tester compares the data with preset standard parameters to judge whether the display effect is qualified or not.
However, since the accuracy of the measurement results is affected by the change of the environmental illumination condition, even if the same test equipment and method are used, the test data obtained at different times or under different environments are different, and frequent environmental adjustment and re-inspection may affect the test efficiency.
Disclosure of Invention
The application provides a method, a device, a medium and a program product for testing the display effect of electronic paper, which are used for improving the testing efficiency of the electronic paper.
In a first aspect, the application provides a method for testing the display effect of electronic paper, which is applied to a testing device, and comprises the steps of sending a testing instruction to control electronic paper and electronic paper to be tested, so that the control electronic paper and the electronic paper to be tested display the same testing image; the method comprises the steps of comparing electronic paper with electronic paper to be tested in the same test environment, obtaining a test reference image of the comparison electronic paper and a target test image of the electronic paper to be tested, determining difference characteristic pixels on the target test image, which are different from the test reference image, calculating a display deviation value of the electronic paper to be tested according to the difference characteristic pixels, and binding a test passing mark of the test image for the electronic paper to be tested when the display deviation value is lower than a display deviation threshold value.
In the embodiment, the test device displays the same test image effect by comparing the control electronic paper with the electronic paper to be tested under the same test environment, and eliminates the influence of environmental factors on the test result by calculating the difference characteristics of the control electronic paper and the electronic paper to be tested, thereby improving the test accuracy and reliability, simplifying the test flow and improving the test efficiency of the electronic paper without devices such as a color difference meter or a spectrophotometer.
In combination with some embodiments of the first aspect, in some embodiments, the test images are multiple, each test image corresponds to a test passing identifier, after the step of binding the test passing identifier of the test image for the electronic paper to be tested when the display deviation value is lower than the display deviation threshold, the method further includes displaying test completion information of the electronic paper to be tested after determining that the test passing identifier of all the test images are bound to the electronic paper to be tested, determining the comparison test times of the comparison electronic paper, wherein the comparison test times are times of displaying all the test images of the comparison electronic paper, and when the comparison test times are equal to or greater than the aging test limit value, replacing the comparison electronic paper as the electronic paper to be tested, and continuing display tests of other electronic papers to be tested by taking the electronic paper to be tested as new comparison electronic paper.
In the embodiment, the test device ensures the consistency of the test standard through the timely replacement of the control electronic paper, avoids the test deviation caused by the performance attenuation of the control electronic paper, and improves the accuracy and the test efficiency of batch test.
With reference to some embodiments of the first aspect, in some embodiments, after the step of determining the number of comparison tests of the comparison electronic paper, the method further includes obtaining a plurality of historical reference images of the comparison electronic paper when the same test image is displayed in different test runs when the number of comparison tests is less than the aging test limit, calculating a plurality of image characteristic parameters of the plurality of historical reference images, determining a performance attenuation curve of the comparison electronic paper based on the plurality of image characteristic parameters, and determining the aging test limit of the comparison electronic paper according to the performance attenuation curve.
In the embodiment, the testing device analyzes the performance attenuation curves of the control electronic paper in different testing rounds, so that the service life of the control electronic paper is accurately estimated, the replacement period of the control electronic paper is optimized, and the reliability of the testing result is ensured.
In combination with some embodiments of the first aspect, in some embodiments, after the step of calculating the display deviation value of the electronic paper to be tested according to the difference feature pixel, the method further includes determining a current test image when the display deviation value is equal to or higher than a display deviation threshold value, acquiring test environment information, determining a standard reference image corresponding to the current test image under the test environment information, respectively calculating a comparison deviation value of the test reference image and the standard reference image and a test deviation value of the target test image and the standard reference image, and binding a test failed identifier of the test image for the electronic paper to be tested when the comparison deviation value is lower than the test deviation value.
In the embodiment, the testing device performs deep analysis when the display deviation exceeds the standard by introducing the standard reference image as the judgment standard, so that double verification of the testing result is realized, the accuracy of the testing result is improved, and misjudgment is avoided.
In combination with some embodiments of the first aspect, in some embodiments, after the step of respectively calculating the comparison deviation value of the test reference image and the standard reference image and the test deviation value of the target test image and the standard reference image, the method further includes binding the test passing identifier of the test image for the electronic paper to be tested when the comparison deviation value is equal to or higher than the test deviation value, replacing the comparison electronic paper with the standby electronic paper, and continuing the display test of the electronic paper to be tested on other test images.
In the embodiment, the testing device ensures the continuity of the testing standard, improves the testing efficiency and ensures the reliability of the testing result by timely replacing the testing device with qualified standby electronic paper when the performance of the contrast electronic paper is attenuated.
With reference to some embodiments of the first aspect, in some embodiments, after the step of binding the test passing identifier of the test image for the electronic paper to be tested when the comparison deviation value is equal to or higher than the test deviation value, the method further includes binding the aging failing identifier for the electronic paper to be tested when the comparison test times of the electronic paper to be tested is smaller than the aging test limit value, and recording that the current test image is an error image of the electronic paper to be tested.
In the embodiment, the testing device establishes the tracking mechanism of performance attenuation by recording the error image of the control electronic paper, thereby being beneficial to analyzing the performance characteristics of the electronic paper and optimizing the testing scheme.
In combination with some embodiments of the first aspect, in some embodiments, the step of calculating a display deviation value of the electronic paper to be tested according to the difference feature pixels specifically includes performing region clustering analysis on the difference feature pixels on the target test image to obtain a plurality of difference feature regions, respectively calculating a brightness deviation value, a chromaticity deviation value and a contrast deviation value of each difference feature region based on a corresponding pixel region on the test reference image as a comparison basis, weighting and summing the brightness deviation value, the chromaticity deviation value and the contrast deviation value based on a preset weight coefficient to obtain region deviation values of each difference feature region, and determining the display deviation value according to the area size of each difference feature region and the corresponding region deviation value.
In the above embodiment, the test device performs the regional cluster analysis on the difference feature pixels and combines a plurality of evaluation dimensions, so as to realize the comprehensive evaluation on the display effect and effectively identify the display defect.
In a second aspect, embodiments of the present application provide a test apparatus comprising one or more processors and a memory coupled to the one or more processors, the memory for storing computer program code comprising computer instructions that the one or more processors invoke the computer instructions to cause the test apparatus to perform a method as described in the first aspect and any of the possible implementations of the first aspect.
In a third aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a testing apparatus, cause the testing apparatus to perform a method as described in the first aspect and any possible implementation of the first aspect.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium comprising instructions which, when run on a test apparatus, cause the test apparatus to perform a method as described in the first aspect and any possible implementation of the first aspect.
It will be appreciated that the test apparatus provided in the second aspect, the computer program product provided in the third aspect and the computer storage medium provided in the fourth aspect are each for performing the method provided by the embodiment of the present application. Therefore, the advantages achieved by the method can be referred to as the advantages of the corresponding method, and will not be described herein.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. the method for comparing and testing the control electronic paper and the electronic paper to be tested under the same testing environment is adopted, and the display deviation value is calculated through the difference characteristic pixels, so that the influence of environmental factors on the testing result can be eliminated, the problem that the testing result is unstable due to the fact that the special optical instrument is only relied on for independent measurement in the related technology is effectively solved, the objectivity and the repeatability of the testing result are further achieved, meanwhile, the testing efficiency is improved, and the testing cost is reduced.
2. Because the standard reference image is used as a judging standard, and double verification is carried out by calculating the comparison deviation value and the test deviation value, the reason of abnormal display effect can be accurately judged, the problem that whether the comparison electronic paper problem or the electronic paper problem to be tested is impossible to distinguish in the related technology is caused by inaccurate test results is effectively solved, and further the reliability and the accuracy of the test results are realized.
3. By adopting the method for aging test and error image recording of the comparison electronic paper, the comparison electronic paper with the attenuated performance can be timely found and replaced, the problem of inconsistent batch test results caused by unstable comparison standards in the related technology is effectively solved, and the continuity and consistency of the test standards are further realized.
Drawings
FIG. 1 is a schematic flow chart of a method for testing the display effect of electronic paper according to an embodiment of the application;
FIG. 2 is a schematic flow chart of another method for testing the display effect of electronic paper according to an embodiment of the application;
FIG. 3 is a schematic diagram of a physical device structure of a testing device according to an embodiment of the present application.
Detailed Description
The terminology used in the following embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates to the contrary. It should also be understood that the term "and/or" as used in this disclosure is intended to encompass any or all possible combinations of one or more of the listed items.
The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of embodiments of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
For ease of understanding, the characteristics of the electronic paper according to the present application will be described first.
Electronic paper (E-paper or Electronic paper) is a display technology that simulates the display effect of paper, also known in the industry as an Electronic ink display screen (E-INK DISPLAY). The display technology has a plurality of unique characteristics that it adopts bistable display principle, which means that power supply is required only when display content is changed, that a reflective display mode, that is, similar to paper, is used to display content by using ambient light reflection, that has extremely low power consumption characteristics, and that consumes little power in a static display state. The electronic paper adopts the reflection display principle and mainly displays content by means of ambient light, so that the display effect of the electronic paper under different ambient illumination conditions can be obviously different, the display brightness can be influenced by the change of ambient illumination intensity, the contrast can be influenced by the change of illumination angle, and the display effect can be influenced by the fluctuation of ambient temperature. These environmental factors can affect not only the display effect but also the measurement result, since the measuring instrument is very sensitive to ambient light. Thus, even with the same test equipment and methods, there is often a difference in test data obtained if the tests are conducted at different times or under different environmental conditions. In order to ensure accuracy and repeatability of the measurement results, it is often necessary to conduct the test under tightly controlled standardized environmental conditions.
The application scenario of the embodiment of the present application is described below.
On the production line of a certain large electronic book reader manufacturing enterprise, the display effect of thousands of electronic paper display devices needs to be tested every day. Traditional manual visual inspection methods are low in efficiency and high in subjectivity, and the measurement is carried out one by using a professional optical instrument and is influenced by environmental illumination changes, so that the test result is unstable. For example, in an 8-hour working shift, the same batch of electronic paper has differences in the morning and noon test results with different sunlight intensities, which not only causes a large number of repeated tests, but also is easy to misjudge.
In the related art, a professional optical instrument is adopted to measure, a plurality of test points of a display screen of the electronic paper are sampled and analyzed, and parameter data such as brightness, contrast, chromaticity and the like are obtained through devices such as a color difference meter or a spectrophotometer, so that quality evaluation of the display effect of the electronic paper is realized. A scenario of a test method using the display effect of the electronic paper in the related art is described below.
And a certain electronic paper production enterprise adopts a professional color difference meter and a spectrophotometer to test the display effect. The tester needs to sample and measure a plurality of test points of each equipment in a constant temperature and humidity darkroom environment, records parameter data such as brightness, contrast and the like, and compares the parameter data with preset standard parameters. However, the testing method has high requirements and high cost, and meanwhile, the problem of different testing effects caused by environmental changes cannot be effectively avoided.
By adopting the contrast test method in the embodiment of the application, the contrast electronic paper and the electronic paper to be tested are tested simultaneously in the same environment, and the display difference is analyzed based on the image processing technology, so that the relative evaluation of the display effect is realized, and the influence of environmental factors is eliminated. The following describes a scenario in which the test method for the display effect of electronic paper in the present application is used.
The electronic paper production line adopting the scheme of the application is provided with a comparison electronic paper with stable performance and an image acquisition system. When a new electronic paper needs to be tested, the system simultaneously sends the same test image to the control electronic paper and the electronic paper to be tested, the display effect is collected under the identical environmental condition, and the difference is calculated through an image analysis algorithm. For example, in the testing process, even if the ambient light changes, the contrast electronic paper and the electronic paper to be tested are influenced at the same time, the relative display effect difference still remains stable, so that the reliability of the testing result is ensured.
Therefore, by adopting the differential test scheme in the embodiment of the application, the objective evaluation of the display effect of the electronic paper is realized, the problem of unstable test caused by environmental change can be effectively solved, and the cost can be effectively controlled while the test efficiency is improved.
For ease of understanding, the method provided in this embodiment is described in the following in conjunction with the above scenario. Fig. 1 is a schematic flow chart of a method for testing display effects of electronic paper according to an embodiment of the application.
S101, sending a test instruction to the control electronic paper and the electronic paper to be tested, so that the control electronic paper and the electronic paper to be tested display the same test image.
The electronic paper to be tested refers to electronic paper equipment which needs to be tested for display effect, the test image refers to standardized image content for evaluating the display effect, and the test image can comprise multiple images of multiple types such as solid-color images, gray-scale images, text images and the like.
The test device performs this step when starting the electronic paper display effect test. Specifically, the test device firstly ensures that the control electronic paper and the electronic paper to be tested are in the same test environment, then generates a test instruction containing test image information, and simultaneously sends the test instruction to the control electronic paper and the electronic paper to be tested through the communication interface, so that two devices synchronously display the identical test image content.
In some embodiments, the sending of the test instruction and the image display can be realized in various modes, wherein the test device can be used for establishing wireless connection with the electronic paper, coding the test image into a display instruction, sending the instruction through a wireless channel and confirming the receiving state of the electronic paper, and the test device can be used for establishing connection with the electronic paper through a USB interface, directly writing the test image data into a display buffer memory, triggering display refreshing and verifying the display state. It will be appreciated that other communication means and display control means may be used to achieve synchronous display of the test images, and are not limited herein.
S102, acquiring a test reference image of the control electronic paper and a target test image of the electronic paper to be tested.
The target test image refers to the acquisition result of the image content currently displayed by the electronic paper to be tested.
The testing device executes the step after confirming that the two electronic papers complete the display of the test image. Specifically, the testing device firstly adjusts the position and parameter setting of the image acquisition equipment to ensure that the acquisition conditions are consistent, then respectively performs image acquisition on the content displayed by the control electronic paper and the electronic paper to be tested, performs preprocessing and format conversion on the acquired image data, and finally obtains a standardized test reference image and a target test image for subsequent analysis. The image capturing device is a device capable of converting display content into a digital signal, such as an industrial camera, scanner, or the like. In some embodiments, the control electronic paper and the electronic paper to be tested can be placed on the same test platform, and image acquisition is performed on the content displayed by the control electronic paper and the electronic paper to be tested.
S103, determining difference characteristic pixels on the target test image, which are different from the test reference image.
Wherein the difference feature pixels represent pixels of the two images that are significantly different in the corresponding positions.
The test device performs this step after the image acquisition is completed. Specifically, the testing device performs pixel level alignment on the test reference image and the target test image, calculates the difference value of each pixel point through an image processing algorithm, screens out pixel points with obvious differences according to a preset difference judging standard, and marks and records the position information and the difference characteristic data of the difference pixels.
In some embodiments, the determination of the difference feature pixels may be achieved in a variety of ways, optionally, the testing device may calculate euclidean distance of pixel values, set a difference threshold, mark pixels exceeding the threshold, cluster the difference region, optionally, the testing device may calculate statistical features of the local region, compare feature differences, determine the anomaly region, and extract the difference feature. It will be appreciated that other image comparison algorithms may be used to effect the identification of the difference feature pixels, and are not limited in this regard.
And S104, calculating the display deviation value of the electronic paper to be tested according to the difference characteristic pixels.
And displaying the deviation value to represent a quantized evaluation result of the display effect of the electronic paper to be tested.
The test device performs this step after completing the differential feature pixel recognition. Specifically, the testing device firstly carries out classification statistics on the difference characteristic pixels, then calculates each deviation index according to the evaluation standard of the differences of different types, obtains a comprehensive deviation value through weighted calculation, and finally normalizes the value into a display deviation value for subsequent judgment. The weight coefficient can be set to represent the importance of different types of differences.
In some embodiments, the calculation of the deviation value may be implemented in various manners, that is, the testing device may optionally calculate the statistical value of each type of difference, apply a preset weight coefficient to perform weighted summation and normalization processing, and the testing device may optionally construct an evaluation feature vector, calculate the composite score using the display effect evaluation model, and convert the composite score into the standard score. It will be appreciated that other calculation methods may be used to achieve a quantitative assessment of display deviation, and are not limited in this regard.
It should be noted that, the display effect evaluation model used herein inputs a large amount of comparison image data of standard electronic paper and electronic paper to be tested during the training stage, including display effect image pairs under different environmental conditions, and corresponding quality scores of manual labeling. Through a deep learning method, a training model identifies the difference modes of multi-dimensional characteristics such as brightness, chromaticity, contrast and the like, and a display effect quantization evaluation standard is established. The training objective is to minimize the error between the model predictive score and the expert score. The display effect evaluation model adopts a multi-layer convolutional neural network structure and comprises a feature extraction layer, a regional attention mechanism and a multi-task learning branch. The feature extraction layer is used for capturing local and global features of the image, the regional attention mechanism focuses on key regions of display defects, and the multi-task learning branches respectively output quality scores of different dimensions. The display effect evaluation model firstly performs image preprocessing and feature extraction by inputting real-time acquired images of the electronic paper to be tested and the control electronic paper, then calculates deviation values of all evaluation dimensions by area analysis, and finally can output comprehensive display deviation values and specific scores of all dimensions, wherein the dimensions of the difference evaluation can be different aspects of display effect evaluation, such as brightness, contrast and the like.
And S105, when the display deviation value is lower than the display deviation threshold value, the test passing identifier of the binding test image of the electronic paper to be tested is provided.
The display deviation threshold represents a standard value for judging whether the display effect is qualified or not, and the test passing mark represents mark information indicating that the test result is qualified.
The test device performs this step after obtaining the display deviation value. Specifically, the testing device firstly obtains a preset display deviation threshold value, then compares the calculated display deviation value with the threshold value, generates a test passing identifier when the display deviation value is lower than the threshold value, associates and stores the identifier information with a unique identifier of the electronic paper to be tested, and records related test data.
In some embodiments, the processing of the test results may be achieved in a variety of ways, including, optionally, the testing device may query the device identification information, generate a test result record, update the test state, save the test report, and optionally, the testing device may create a result database entry, correlate the test parameters, record test environment information, and generate a quality traceability code. It will be appreciated that other methods may be used to implement the management and traceability of test results, and are not limited herein.
In the above embodiments, the test efficiency is improved by the comparative analysis and the automated process. In practical application, the system also needs to replace the control electronic paper in time, so that the continuity and reliability of the test standard are ensured. The method provided in this embodiment will be described in more detail. Fig. 2 is a schematic flow chart of a method for testing display effects of electronic paper according to an embodiment of the application.
S201, sending a test instruction to the control electronic paper and the electronic paper to be tested, so that the control electronic paper and the electronic paper to be tested display the same test image.
Referring to step S101, the testing device displays the test image on the electronic paper to be tested and the control electronic paper.
S202, acquiring a test reference image of the control electronic paper and a target test image of the electronic paper to be tested.
Referring to step S102, the test apparatus acquires a test reference image and a target test image.
S203, determining difference characteristic pixels on the target test image, which are different from the test reference image.
Referring to step S103, the testing device determines the difference feature pixels.
S204, calculating the display deviation value of the electronic paper to be tested according to the difference characteristic pixels.
Referring to step S104, the testing device calculates a display deviation value.
In some embodiments, when calculating the display deviation value, the test device performs area cluster analysis on the difference feature pixels on the target test image to obtain a plurality of difference feature areas, then calculates the brightness deviation value, the chromaticity deviation value and the contrast deviation value of each difference feature area based on the corresponding pixel areas on the test reference image, performs weighted summation on the brightness deviation value, the chromaticity deviation value and the contrast deviation value based on a preset weight coefficient to obtain the area deviation value of each difference feature area, and finally determines the display deviation value according to the area size of each difference feature area and the corresponding area deviation value.
The brightness deviation value is used for representing the deviation degree of the regional brightness degree, the chromaticity deviation value represents the deviation degree of the color characteristic, the contrast deviation value refers to the change degree of the local brightness contrast of the image, and the weight coefficient is used for representing the importance degree of different deviation indexes.
The system performs this region analysis process after completing the differential pixel recognition. Specifically, the system firstly groups the identified difference pixel points by using a spatial clustering algorithm to form a plurality of difference characteristic areas with spatial continuity, then calculates multi-dimensional display quality indexes including the deviation values of brightness, chromaticity and contrast for each area, then carries out weighted calculation according to the weight coefficient set by the display effect evaluation standard, and finally carries out comprehensive evaluation by considering the size of each area to obtain the integral display deviation value.
In some embodiments, the region analysis and bias calculation may be implemented in a variety of ways, alternatively, the system may use a DBSCAN algorithm (Density-Based Spatial Clustering of Applications with Noise, a Density-based clustering algorithm) to spatially cluster, calculate the region statistics, apply a multi-dimensional assessment model, generate a weighted score, alternatively, the system may use a region growing algorithm to divide the regions, extract the region feature vectors, calculate the quality index matrix, and perform multi-level fusion. It will be appreciated that other algorithms and models may be used to implement the regional signature analysis and quality assessment, and are not limited in this regard.
And S205, when the display deviation value is lower than the display deviation threshold value, the test passing identifier of the binding test image of the electronic paper to be tested is provided.
Referring to step S105, the testing device marks the electronic paper to be tested as passing the test when the display deviation value is lower than the display deviation threshold.
S206, when the display deviation value is equal to or higher than the display deviation threshold value, determining the current test image.
Wherein the current test image represents the specific image content for which the display test is being performed.
The test device performs this step when a display deviation abnormality is detected. Specifically, the testing device firstly retrieves corresponding original testing image data from the testing image library according to the characteristic information of the testing reference image and the target testing image, and extracts the complete information of the testing image for subsequent standardized comparison analysis. The test image library is used for representing a data set for storing all test images, and the test images are arranged according to a specified test sequence.
S207, acquiring test environment information and determining a standard reference image corresponding to the current test image under the test environment information.
The test environment information represents various environmental factor data influencing the display effect, including environmental factors such as temperature, humidity and illumination, the standard reference image is an ideal display effect standard under specific environmental conditions, and the standard image library represents a data set storing standard display effects under different environmental conditions.
The test device performs this step after determining the current test image. Specifically, the testing device firstly collects detailed parameters of the current testing environment through various environment sensors, then retrieves standard display effect data which is most matched with the current testing environment from a standard image library according to the environment parameters, and finally determines a standard reference image by combining the content characteristics of the current testing image.
In some embodiments, the determination of the standard reference image may be achieved in a variety of ways, optionally, the testing device may collect environmental parameter data, calculate environmental impact coefficients, retrieve a standard image library, generate a matched reference image, optionally, the testing device may build a test environmental compensation model, predict display effect changes, adjust the standard reference data, and output a corrected reference image. It will be appreciated that other ways of achieving an environmentally adapted standard reference image generation may also be employed, without limitation.
It should be noted that, in the test environment compensation model, standard display effect data and actual test data under different environmental conditions (temperature, humidity, illumination, etc.) are input in the training stage, and the training model understands the rule of influence of environmental factors on the display effect. The training objective is to minimize the difference between the ambient compensated display effect and the standard effect. The test environment compensation model adopts an environment factor mapping network and comprises an environment parameter coding layer, an influence factor analysis layer and a compensation calculation layer. The coding layer processes the environmental data, the analysis layer establishes an environmental impact model, and the compensation layer generates correction parameters. By inputting current test environment parameters and original test data, the test environment compensation model can calculate environment influence coefficients, and generates standard reference images after environment compensation for more accurate display effect evaluation.
S208, respectively calculating the comparison deviation value of the test reference image and the standard reference image and the test deviation value of the target test image and the standard reference image.
The test deviation value refers to the display difference degree of the electronic paper to be tested relative to the standard state.
The test device performs this step after obtaining the standard reference image. Specifically, the test device performs pixel level comparison on the test reference image and the target test image with the standard reference image respectively, calculates deviation values of various types based on a plurality of characteristic dimensions respectively, obtains a comprehensive deviation index through weighted fusion, and finally generates a comparison deviation value and a test deviation value respectively for subsequent performance judgment.
In some embodiments, the calculation and comparison of the deviation values may be achieved in a variety of ways, optionally, the testing device may extract multidimensional feature parameters, calculate the deviation values of each dimension, apply a weighting system to generate a comprehensive deviation index, the feature dimensions represent various aspects of evaluating the display effect, such as brightness, chromaticity, contrast, etc., optionally, the testing device may construct an image quality evaluation model, input comparison data, calculate a quality score, and normalize the processing results. It will be appreciated that other evaluation algorithms may be used to achieve quantitative analysis of the display effect, and are not limited in this regard.
In some embodiments, the test device binds the test passing identifier of the test image for the electronic paper to be tested when the comparison deviation value is equal to or higher than the test deviation value, and replaces the comparison electronic paper with the standby electronic paper to continue the display test of the electronic paper to be tested in other test images.
The standby electronic paper is electronic paper equipment with qualified performance, and can be electronic paper which has recently completed the test, for example, the electronic paper to be tested which passes the display test can be temporarily stored in a standby library to be used as standby electronic paper, and the standby electronic paper is replaced to be the electronic paper to be tested which passes the display test just after the next electronic paper to be tested passes the display test.
The system performs the replacement process after comparing the deviation values. Specifically, the system firstly judges whether the comparison deviation value is equal to or higher than the test deviation value, when the condition is met, the display effect of the current comparison electronic paper is not suitable for being used as a test reference, at the moment, the system binds the test passing mark to the electronic paper to be tested, meanwhile, selects the standby electronic paper from the standby library as a new comparison electronic paper, updates the test configuration information, and continues to execute the subsequent test image display test.
In some embodiments, the test device binds the aging failure mark for the electronic paper when the number of comparison tests of the electronic paper is smaller than the aging test limit value, and records the current test image as an error image of the electronic paper.
The comparison test times are the test cycle times completed by the comparison electronic paper, the aging test limit value is used for indicating the allowed maximum test times, and the error image is used for indicating the test image which causes the failure of performance judgment.
The system performs this identification process when checking against the number of tests. Specifically, the system firstly compares the comparison test times with the aging test limit value, when the test times are smaller than the limit value but abnormal performance occurs, the abnormal attenuation of the comparison electronic paper is shown, at the moment, the system adds an aging failing mark for the comparison electronic paper, and the test image which causes the judgment failure is recorded as an error image for subsequent performance analysis and problem diagnosis.
In some embodiments, the determination and recording of the aging state may be achieved in a variety of ways, optionally, the system may analyze the cause of the performance anomaly, generate a fault diagnosis report, mark a problem image, update the device state, optionally, the system may build a performance monitoring model, calculate an attenuation index, record anomaly data, and generate pre-warning information. It will be appreciated that detection and recording of performance anomalies may also be accomplished in other ways, and is not limited in this regard.
S209, when the comparison deviation value is lower than the test deviation value, the test of the binding test image of the electronic paper to be tested is not marked.
Wherein the test does not pass the status flag indicating that the test failed.
The test device performs this step after completing the deviation value comparison. Specifically, the test device firstly compares the magnitude relation between the comparison deviation value and the test deviation value, when the comparison deviation value is lower than the test deviation value, the display effect of the electronic paper to be tested is obviously inferior to that of the comparison electronic paper, a test failed mark is generated at the moment, the result information is associated with the identity information of the electronic paper to be tested, and detailed test data and failure reasons are recorded.
In some embodiments, the processing and recording of test results may be achieved in a variety of ways, optionally, the test apparatus may generate a result determination report, update device test status, record deviation data, save failure cause analysis, and optionally, the test apparatus may create test record entries, correlate device information, store test parameters, and generate retrospective codes. It will be appreciated that other methods of managing and tracking test results may be employed, as is not limited herein.
And S210, after determining that the electronic paper to be tested is bound with the test passing identifiers of all the test images, displaying the test completion information of the electronic paper to be tested.
The test completion information is state information showing that the test is successful in the whole display.
The test device performs this step after all test items are completed. Specifically, the test device firstly checks all test result records of the electronic paper to be tested, confirms whether pass identifiers of all test images are obtained, generates final test completion information after verifying that all tests pass, comprises contents such as test summary reports, performance evaluation data and the like, and outputs the information through a display interface or other modes.
In some embodiments, the confirmation and display of the test results may be achieved in a variety of ways, including, optionally, the test device may count the test result data, generate a test report, display a pass identifier, and output detailed test data, and optionally, the test device may verify test integrity, aggregate performance metrics, generate a quality certificate, and send a test notification. It will be appreciated that other means of confirming and presenting test results may be employed, as is not limited herein.
S211, determining the comparison test times of the comparison electronic paper.
The comparison test times represent the number of test cycles completed by the comparison electronic paper, namely the number of repetition of the complete test flow.
The test device performs this step after each complete round of testing. Specifically, the testing device firstly inquires a testing history record of the control electronic paper, counts the number of completed testing rounds, then adds the testing information of the current rounds into the history record, and updates the count value of the control testing times for evaluating the use state of the control electronic paper.
In some embodiments, statistics and recording of test times can be achieved in various ways, optionally, the test device can read historical test records, update test counters, record test time stamps and store test data, and optionally, the test device can establish a test historical database, count test frequencies, analyze test rules and predict service lives. It will be appreciated that other methods of managing and analyzing the number of tests may be used, and are not limited in this regard.
In some embodiments, the test device may obtain a plurality of historical reference images of the control electronic paper when the number of comparison tests is smaller than the aging test limit value and the same test image is displayed in different test rounds, calculate a plurality of image characteristic parameters of the historical reference images, determine a performance attenuation curve of the control electronic paper based on the image characteristic parameters, and determine the aging test limit value of the control electronic paper according to the performance attenuation curve.
The historical reference image represents image data acquired in different test rounds, the image characteristic parameters refer to various quantization indexes describing display effects, the performance attenuation curve is used for representing the trend of display performance changing along with the use times, and the aging test limit value refers to a maximum test time threshold value determined according to the performance change.
The system performs this analysis when it is monitored that the number of control tests is low. Specifically, the system firstly collects historical image data of the control electronic paper when the same content is displayed in multiple tests, then extracts multidimensional characteristic parameters of the images, establishes a trend model showing the change of performance along with time, namely a performance attenuation prediction model through data analysis, and finally dynamically adjusts an aging test limit value according to a performance attenuation rule to realize scientific evaluation of the service life of the control electronic paper.
It should be noted that, in the performance decay prediction model of the present application, the complete life cycle data of the history control electronic paper is input in the training stage, including the display parameters, the environmental conditions and the test results of different test rounds. And (3) learning a performance change rule by a time sequence analysis and machine learning method, and establishing an attenuation trend prediction model. The training criteria is to minimize the error of the performance prediction values from the actual observations. The performance decay prediction model combines a time sequence prediction network and a state evaluation network, and comprises a historical data encoder, a trend analyzer and a prediction decoder. The encoder processes the historical performance data, the trend analyzer establishes a performance change pattern, and the predictive decoder generates future performance change trends. By inputting historical test data and current performance parameters of the control electronic paper, the performance decay prediction model can analyze the performance change trend, predict possible decay time points in the future, and output performance early warning information and recommended replacement time.
In some embodiments, analysis and evaluation of performance decay may be achieved in a variety of ways, alternatively, the system may construct a time series dataset, extract performance feature vectors, fit decay curves, predict performance changes, alternatively, the system may construct a multi-dimensional evaluation model, analyze performance degradation rules, determine critical thresholds, and generate life predictions. It will be appreciated that other algorithms and models may be used to implement quantitative analysis of performance decay, and are not limited in this regard.
And S212, when the comparison test times are equal to or greater than the aging test limit value, replacing the comparison electronic paper with the electronic paper to be tested, and continuing the display test of other electronic papers to be tested by taking the electronic paper to be tested as new comparison electronic paper.
The aging test limit value represents a maximum number threshold value of the control electronic paper which can be used for testing.
The test device performs this step after determining the number of control tests. Specifically, the test device compares the comparison test times with a preset aging test limit value, when the comparison test times reach or exceed the limit value, the electronic paper to be tested passing the test is used as a new comparison electronic paper to perform display tests of other electronic papers to be tested, and meanwhile, the test device can update the test reference information of the new comparison electronic paper and reset the test times counter to ensure continuity of the test standard.
In the embodiment of the application, the relative test method based on the contrast electronic paper, the multidimensional image analysis technology and the intelligent test management mechanism are adopted, so that the accurate contrast evaluation of the display effect, the automatic test flow and the dynamic optimization of the test standard can be realized, the problems of strong environment dependence, low test efficiency, unstable result and the like in the traditional test method are effectively solved, and the high efficiency, the high accuracy and the high reliability of the electronic paper display effect test are further realized.
The following describes a test device in the embodiment of the present application from the perspective of hardware processing, please refer to fig. 3, which is a schematic diagram of a physical device structure of the test device in the embodiment of the present application.
It should be noted that the structure of the testing device shown in fig. 3 is only an example, and should not limit the functions and the application scope of the embodiments of the present invention.
As shown in fig. 3, the test apparatus includes a central processing unit (Central Processing Unit, CPU) 301 that can perform various appropriate actions and processes, such as performing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) 302 or a program loaded from a storage section 308 into a random access Memory (Random Access Memory, RAM) 303. In the RAM 303, various programs and data required for the system operation are also stored. The CPU 301, ROM 302, and RAM 303 are connected to each other through a bus 304. An Input/Output (I/O) interface 305 is also connected to bus 304.
Connected to the I/O interface 305 are an input section 306 including an audio input device, a push button switch, and the like, an output section 307 including a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) and an audio output device, an indicator lamp, and the like, a storage section 308 including a hard disk, and the like, and a communication section 309 including a network interface card such as a LAN (Local Area Network) card, a modem, and the like. The communication section 309 performs communication processing via a network such as the internet. The drive 310 is also connected to the I/O interface 305 as needed. A removable medium 311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed on the drive 310 as needed, so that a computer program read therefrom is installed into the storage section 308 as needed.
In particular, according to embodiments of the present invention, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 309, and/or installed from the removable medium 311. When the computer program is executed by a Central Processing Unit (CPU) 301, various functions defined in the present invention are performed.
Specific examples of a computer-readable storage medium include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures.
Specifically, the test device of the present embodiment includes a processor and a memory, where the memory stores a computer program, and when the computer program is executed by the processor, the test method for the display effect of the electronic paper provided in the foregoing embodiment is implemented.
As another aspect, the present invention also provides a computer-readable storage medium that may be included in the test apparatus described in the above embodiment, or may exist alone without being assembled into the test apparatus. The storage medium carries one or more computer programs which, when executed by a processor of the test apparatus, cause the test apparatus to implement the method for testing the display effect of electronic paper provided in the above embodiment.
While the application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that the foregoing embodiments may be modified or equivalents may be substituted for some of the features thereof, and that the modifications or substitutions do not depart from the spirit of the embodiments.
As used in the above embodiments, the term "when..is interpreted as meaning" if..or "after..or" in response to determining..or "in response to detecting..is" depending on the context. Similarly, the phrase "when determining..or" if (a stated condition or event) is detected "may be interpreted to mean" if determined.+ -. "or" in response to determining.+ -. "or" when (a stated condition or event) is detected "or" in response to (a stated condition or event) "depending on the context.
Those of ordinary skill in the art will appreciate that implementing all or part of the above-described method embodiments may be accomplished by a computer program to instruct related hardware, the program may be stored in a computer readable storage medium, and the program may include the above-described method embodiments when executed. The storage medium includes a ROM or a random access memory RAM, a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. A method for testing the display effect of electronic paper, which is characterized by being applied to a testing device, the method comprising:
sending a test instruction to the control electronic paper and the electronic paper to be tested, so that the control electronic paper and the electronic paper to be tested display the same test image;
acquiring a test reference image of the control electronic paper and a target test image of the electronic paper to be tested;
Determining difference feature pixels on the target test image, which are different from the test reference image;
calculating the display deviation value of the electronic paper to be tested according to the difference characteristic pixels;
And binding a test passing identifier of the test image for the electronic paper to be tested when the display deviation value is lower than a display deviation threshold value.
2. The method of claim 1, wherein the plurality of test images each correspond to a test pass identifier, and wherein after the step of binding the test pass identifier of the test image for the electronic paper under test when the display deviation value is below a display deviation threshold, the method further comprises:
After determining that the electronic paper to be tested is bound with the test passing identifiers of all the test images, displaying the test completion information of the electronic paper to be tested;
determining the comparison test times of the comparison electronic paper, wherein the comparison test times are rounds of displaying all the test images by the comparison electronic paper;
And when the comparison test times are equal to or greater than the aging test limit value, replacing the comparison electronic paper with the electronic paper to be tested, and continuing the display test of other electronic papers to be tested by taking the electronic paper to be tested as a new comparison electronic paper.
3. The method of claim 2, wherein after the step of determining the number of control tests for the control electronic paper, the method further comprises:
when the comparison test times are smaller than the aging test limit value, acquiring a plurality of historical reference images when the comparison electronic paper displays the same test image in different test rounds;
calculating a plurality of image characteristic parameters of the historical reference images, and determining a performance attenuation curve of the control electronic paper based on the image characteristic parameters;
and determining the aging test limit value of the control electronic paper according to the performance attenuation curve.
4. The method according to claim 1, wherein after the step of calculating the display deviation value of the electronic paper to be tested based on the difference feature pixels, the method further comprises:
Determining a current test image when the display deviation value is equal to or higher than the display deviation threshold value;
acquiring test environment information and determining a standard reference image corresponding to the current test image under the test environment information;
Respectively calculating a comparison deviation value of the test reference image and the standard reference image and a test deviation value of the target test image and the standard reference image;
and when the comparison deviation value is lower than the test deviation value, the test binding the test image for the electronic paper to be tested is not marked.
5. The method of claim 4, wherein after the step of separately calculating the control deviation value of the test reference image from the standard reference image, the test deviation value of the target test image from the standard reference image, the method further comprises:
binding a test passing identifier of the test image for the electronic paper to be tested when the comparison deviation value is equal to or higher than the test deviation value;
and replacing the control electronic paper as standby electronic paper, and continuing the display test of the electronic paper to be tested on other test images.
6. The method of claim 5, wherein, after the step of binding the test passing identifier of the test image for the electronic paper under test when the control deviation value is equal to or higher than the test deviation value, the method further comprises:
Binding an aging failure mark for the control electronic paper when the control test times of the control electronic paper are smaller than the aging test limit value;
and recording the current test image as an error image of the control electronic paper.
7. The method according to claim 1, wherein the step of calculating the display deviation value of the electronic paper to be tested according to the difference feature pixel specifically includes:
performing regional cluster analysis on the difference characteristic pixels on the target test image to obtain a plurality of difference characteristic regions;
respectively calculating a brightness deviation value, a chromaticity deviation value and a contrast deviation value of each difference characteristic region by taking a corresponding pixel region on the test reference image as a comparison basis;
Based on a preset weight coefficient, carrying out weighted summation on the brightness deviation value, the chromaticity deviation value and the contrast deviation value to obtain a region deviation value of each difference characteristic region;
and determining a display deviation value according to the area size of each difference characteristic area and the corresponding area deviation value.
8. A test apparatus comprising one or more processors and memory coupled to the one or more processors, the memory to store computer program code comprising computer instructions that the one or more processors invoke to cause the test apparatus to perform the method of any of claims 1-7.
9. A computer readable storage medium comprising instructions which, when run on a test apparatus, cause the test apparatus to perform the method of any of claims 1-7.
10. A computer program product, characterized in that the computer program product, when run on a test device, causes the test device to perform the method according to any of claims 1-7.
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