1. 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.