An ROI Extraction Method of Finger Vein Images Based on Large Receptive Field Gradient Operator for Accurate Localization of Joint Cavity

Table 4

EERs calculated by different ROI extraction methods.

Feature	ROI	MMCBNU_6000 (%)	UTFVP (%)	FV-USM (%)
Maximum curvature	Yao’s method	6.33	1.39	8.85
	Single sliding window method	6.76	4.24	5.89
	Fixed window	4.97	3.29	2.47
	Dual-sliding windows	5.77	4.51	6.38
	Single-line accumulation	7.19	3.59	4.50
	Proposed method	4.91	2.77	2.81
Repeated line tracking	Yao’s method	4.26	1.74	13.22
	Single sliding window method	3.76	1.35	3.59
	Fixed window	2.38	1.04	1.52
	Dual-sliding windows	3.22	1.53	4.84
	Single-line accumulation	3.95	1.12	3.34
	Proposed method	3.73	0.97	1.69