CIE x050-OP048

CIELAB was recommended by CIE in 1976 as an approximately uniform colour space and colour-difference formula based on CIE X Y Z tristimulus values. In this paper, analogous to CIELAB were evaluated using L M S and X_F Y_F Z_F colour spaces in place of X Y Z. From COM-corrected visual dataset employed at CIEDE2000 development, using the Standardized Residual Sum of Squares, we found that CIELAB and its analogous in X_F Y_F Z_F space performed similarly, but the analogous to CIELAB in L M S colour space performed worse. Anyway, CIELAB structure can be optimized by fitted values of parameters in L M S or X_F Y_F Z_F spaces proposed in this work. The improved CIELAB in X_F Y_F Z_F space can be used as an approximately uniform colour space and colour-difference formula, following research proposed by CIE TC 1-98.