Method and device for obtaining mura compensation value, and display panel

A device for obtaining a mura compensation value, comprising:

• an image acquisition and three-primary-colors display data matrix extraction device, configured for obtaining an image of a detection picture displayed on a display panel and extracting display data matrices of three primary colors from the image of the detection picture;
• a first correction matrix obtaining device, configured for constructing a standard matrix and subtracting the standard matrix from the display data matrices of the three primary colors to obtain first correction matrices of the three primary colors, so as to correct the display data matrices of the three primary colors;
• an extreme point position coordinate obtaining device, configured for obtaining position coordinates of extreme points of the first correction matrices of the three primary colors, wherein the first correction matrix of each primary color has one or more position coordinates of extreme points;
• a second correction matrix obtaining device, configured for obtaining second correction matrices of the three primary colors from the first correction matrices of the three primary colors, so as to further correct the first correction matrices of the three primary colors;
• a third correction matrix extraction device, configured for extracting a third correction matrix of each primary color from the second correction matrix of the each primary color based on position coordinates of an extreme point of the first correction matrix of the each primary color and forming a third correction matrix group of the primary color from third correction matrices extracted based on the position coordinates of all extreme points of the first correction matrix of the primary color;
• and
• a compensation matrix obtaining device, configured for obtaining a compensation matrix of each primary color from one third correction matrix in the third correction matrix group of the each primary color and forming a compensation matrix group of the primary color from the compensation matrices of the primary color obtained from all the third correction matrices in the third correction matrix group of the primary color, wherein elements of the compensation matrices of the primary color are mura compensation values of the primary color of the display panel.