Method and device for testing video brightness and chromaticity deviation

Abstract

The invention provides a video brightness and chrominance deviation test method and device. The method comprises the steps of obtaining color difference information and brightness information in a standard image; Analyzing the chromatic aberration information and the brightness information to generate a deviation table of chromatic aberration to brightness; Performing scale line design on the deviation table by applying a cosine function curve, and generating color difference scale lines corresponding to the color difference and brightness scale lines corresponding to the brightness; Arrangingthe chromatic aberration scale lines and the brightness scale lines by applying a vernier caliper principle to generate a chromatic aberration scale line group corresponding to chromatic aberration and a brightness scale line group corresponding to brightness; Combining the chromatic aberration scale line group and the brightness scale line group to generate measurement ruler information; And testing the to-be-tested image according to the information of the measuring scale. The color difference scale line group and the brightness scale line group are combined by applying the vernier caliperprinciple to generate the measuring scale, and the measuring scale is used for testing the to-be-tested image, so that the accuracy of the video brightness and chrominance deviation test is improved.

Description

technical field [0001] The invention relates to the technical field of video deviation testing, in particular to a video brightness and chrominance deviation testing method and device. Background technique [0002] Since the video bandwidth of 4K ultra-high-definition digital TV, 8K ultra-high-definition digital TV, and digital movies at home and abroad is 4 times or more than 8 times that of high-definition TV, the current test methods and test equipment for the chroma / luminance delay of their videos are relatively Few, currently only the lightning test item of the waveform oscilloscope checks the chromaticity / luminance delay, and the test can only judge the approximate value of the scale between the distance between the coincidence point of chromaticity and luminance and the 9 scale cross lines, and the test accuracy is only 20ns , there is a lack of intuitive and effective high-bandwidth video test methods and test parameters at home and abroad. Contents of the inventio...

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Problems solved by technology

[0002] Since the video bandwidth of 4K ultra-high-definition digital TV, 8K ultra-high-definition digital TV, and digital movies at home and abroad is 4 times or more than 8 times that of high-definition TV, the current test methods and test equipment for the chroma / luminance delay of their videos are relatively Few, currently only the lightning test item of the waveform oscilloscope checks the chromaticity / luminance delay, and the test can only judge the approximate value of the scale between the distance between the coincidence point of chromaticity and luminance and the 9 scale cross lines, and the test accuracy is only 20ns , there is a lack of intuitive and effective high-bandwidth video test methods and test parameters at home and abroad

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