Image acquisition device works as follows: Uniform light fromthe light source shines on the collected image, and reflected lightor transmission light with color features occurs after the reflectionor transmission of image; then, the reflected light or transmissionlight exposures to the filter through the optical system, and getsR, G, B component through color filter; finally, the light exposuresto corresponding CCD to convert into analog signal respectively,and converts to digital signal of RGB, storing and getting the RGBimage after signal processing. The ideal color image acquisitionequipment should meet Luther condition, that there is a lineartransformation among tristimulus values and the values collected.But in practical application, the light source of color image acqui-sition device, the color filter and CCD are nonlinear. Furthermore,this image acquisition device uses the RGB color space which isequipment related. Therefore, to improve the accuracy of colorreproduction, we need to find more accurate corresponding rela-tion between input color information and output color information,and apply the mapping relation to the image under study. Based onthe above analysis, color restoration model diagram designed inthis paper are as Fig. 1.