Considering the non-linearity among chroma (Cb, Cr component) and luminance (Y component) of skin color in the high and low luminance region, the skin color model is constructed by two lookup tables in Y-Cb and Y-Cr subspaces.

• 考虑到在高亮度区和低亮度区肤色色度(Cb,Cr分量)与亮度(Y分量)非线性相关,采用Y-Cb和Y-Cr两个子空间的查询表来建立肤色模型。