An Efficient and Robust Iris Segmentation Algorithm Using Deep Learning

Table 3

Experimental results of finding the best architecture of RPN.

	Overlap range	MinBox sizes	Box pyramid scale	NumBox pyramid levels	Precision	Recall
A			1.1	9	0.9810	0.9793
B			1.1	9	0.9489	0.9568
C			1.1	9	0.9922	0.9918
D			1.1	9	0.9900	0.9888
E			1.1	9	0.9825	0.9825
F			1.2	5	0.9737	0.9800
G			1.2	5	0.9762	0.9778
H			1.2	5	0.9604	0.9640
I			1.2	5	0.9778	0.9805
J			1.1	9	0.9400	0.9398

“Overlap Range” is the bounding box overlap ratios for selecting negative and positive samples. “MinBox Sizes” is the minimum anchor box sizes used to build the anchor box pyramid. “Box Pyramid Scale” is the anchor box pyramid scale factor used to successively upscale anchor box sizes. “NumBox Pyramid Levels” is the number of levels in an anchor box pyramid.