Table 3.

The average color difference of different algorithms.

Model		CIELAB Color Difference	CIELUV Color Difference	CIEDE2000 Color Difference
KPLS	P-kernel	1.5447	1.3335	0.8356
KPLS	G-kernel	1.4779	1.3372	0.8631
KPLS	RP-kernel	1.3836	1.2643	0.7598
RP-OLS [32]		1.4221	1.2933	0.7775
MLP		4.052	4.4166	2.8895
WT-NONLIN formula 1 [39]		1.7977	1.5839	1.0207
WT-NONLIN formula 2 [39]		1.7272	1.5343	0.9858
WT-NONLIN formula 3 [39]		1.7242	1.5429	0.9799
WT-NONLIN formula 4 [39]		1.5878	1.4017	0.8847