Study on color space conversion from CMYK to L~*a~*b~*
CMYK到L~*a~*b~*色彩空间转换的研究

Color space conversion is the key technology in color management,direct quality-detection of printing images and color separation. Therefore, it is very important to find out a accurate and practical transform from CMYK to L*a*b*. In this paper the dot colorimetric plane of four-color halftone printing based on optic phenomena was verified by the standard printing. Then the equation of transition from CMYK to L*a*b* was modeled by analyzing the colorimetric values of process printing patches based on mathematic statistical method and numerical analysis method. And its precision was discussed and the main reasons that influence the equation precision were analyzed.