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

Table 3

EERs obtained by different widths of joint cavity detection region.

Joint cavity width	1	3	5	7	9	11	13	15
EER	3.082	2.811	2.913	2.913	2.913	2.913	2.947	2.981

This is the lowest EER and represents the best matching performance. In the paper, we describe it (“The minimum EER (2.811) value is obtained when the size of the operator is 6 × 7 and the joint cavity detection area is 3.”).