Table 1. Result of the extracted features with different feature selection methods by SVM classifier under halogen and UV excitations.

Illumination source	Feature sets	Org. feature size	Feature selection methods(12features) SVM classifier
			Original	plusLrR	Fisher	MDS	PCA	iKICA
Halogen	IR	33	81.25	44.64	64.29	46.43	84.82	95.54
	DIR	32	93.75	90.18	90.18	89.29	94.64	99.11
	RRI	32	78.57	64.29	83.04	73.21	73.21	100.0
	NDRI	32	74.11	56.25	66.96	73.21	73.21	99.11
UV	IR	33	99.11	96.43	98.21	93.75	99.11	99.25
	DIR	32	100.0	99.11	100.0	100.0	100.0	100.0
	RRI	32	100.0	93.75	100.0	100.0	100.0	100.0
	NDRI	32	99.11	86.61	100.0	99.11	100.0	99.75