Table 4.

Comparing results of uni-biometric and multi-instance fingerprints recognition system for 5 kernel functions with two strategies of feature fusion

Fingerprint multi-instance recognition system
Database	Kernel function	Gaussian (%)	PolyPlus (%)	Polynomial (%)	Linear (%)	Hamming (%)
Uni-biometric Left thumbprint	Gabor Dim=73960			57%
	Gabor + KLDA Dim-150	57	71	71	72	75
	Gabor + KPCA Dim-150	-	64	64	63	-
Uni-biometric Right thumbprint	Gabor Dim=73960			54
	Gabor + KLDA Dim-150	54	60	60	67	69
	Gabor + KPCA Dim-150	-	60	61	67	-
Multi-instance fusion strategy	Serial Dim=147920			67
	KLDA DM=80	71	86	86	87	87
	KPCA Dim=80	-	69	73	72	-

LDA – Linear discriminant analysis; KLDA – Kernel LDA