Table 3.

Error for seven important colors in Fig. 1

Patch number	L*a*b* error (ΔE)
	Proposed method Using all 30 colors	Using general 24 colors (excluding tongue colors)
E–a (Tang, fur)	3.4	10.0
E–b (Tang)	0.8	4.3
E–c (Skin, dermatitis)	0.8	2.0
E–d (Tang)	11.1	9.0
E–e (Tang)	17.3	13.4
E–f (Tang, fur)	1.4	3.3
D–a (Tang)	1.2	7.1