Color Look-Up Table Design for Gamut Mapping and Color Space Conversion

This paper proposes a method for designing a color lookup table (CLUT) that can simultaneously process gamut mapping and color space conversion without any complex computation. After constructing a LUT composed of the scanner and printer gamuts, fictive sample points are uniformly selected in CIELAB space and CMY values computed using gamut mapping. The scanner input RGB image is then converted into CIELAB using a regression function and the scanner RGB values converted into CMY values using the proposed CLUT that includes gamut mapping without any additional gamut mapping process. In experiments, the proposed method produced a similar color difference to the direct computation method, yet a reduced computational complexity when compared with discrete gamut mapping and color space conversion.