US 2015/0317929 A1 · METHOD AND DEVICE FOR IMAGE DETECTION

Abstract

The present invention discloses a method and device for image detection. After an acquired dark state image of a display panel is divided into a plurality of areas according to a preset rule, RGB values of each area are determined and converted into XYZ values. The L* and C* values in the CIE-LCH standard are calculated and statistical analysis is performed to the L* and C* values of the areas in the dark state image to determine statistical parameters of the display image. A dark state uniformity coefficient of the dark state image is determined based on the determined statistical parameters, and the uniformity of the dark state image of the display panel is determined through the dark state uniformity coefficient. A standard for evaluating uniformity of a dark state image is established through the above process, which facilitates unified detection of uniformity of the dark state image of the display panel.

Claims14

Dependent claims

A method for image detection comprising:

determining RGB values of each area after an acquired dark state image of a display panel is divided into a plurality of areas according to a preset rule;
calculating corresponding XYZ values of each area in the CIE-XYZ standard respectively based on the RGB values of each area;
calculating L* and C* values of each area in the CIE-LCH standard respectively based on the XYZ values of each area;
performing statistical analysis on the L* and C* values of the areas in the dark state image so as to determine statistical parameters of the display image, the statistical parameters comprising:
the maximum value, the mean value, the normally distributed 3σ value, and the Sobel value of the L* and C* values;
determining a dark state uniformity coefficient of the dark state image based on the determined statistical parameters, and determining uniformity of the dark state image of the display panel through the dark state uniformity coefficient.

3 more elements

A device for image detection comprising:

an image acquisition unit for acquiring a dark state image of a display panel;
an RGB determination unit for determining RGB values of each area after the acquired dark state image of the display panel is divided into a plurality of areas according to a preset rule;
an XYZ determination unit for calculating corresponding XYZ values of each area in the CIE-XYZ standard respectively based on the RGB values of each area;
an L* and C* value determination unit for calculating L* and C* values of each area in the CIE-LCH standard respectively based on the XYZ values of each area;
a statistical analysis unit for performing statistical analysis to the L* and C* values of the areas in the dark state image so as to determine statistical parameters of the display image, the statistical parameters comprising the maximum value, the mean value, the normally distributed 3σ value, and the Sobel value of the L* and C* values;
a dark state uniformity determination unit for determining a dark state uniformity coefficient of the dark state image based on the determined statistical parameters, and determining uniformity of the dark state image of the display panel through the dark state uniformity coefficient.

3 more elements

Dependencies are inferred from the claim text.

Method and device for image detection

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Method and device for image detection

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Abstract

Claims14