Table 2. Comparison of the proposed selection with random selection and uniform selection. The data format in the table is the mean (standard deviation).

Setting		5%	10%	25%	50%	100%
SRF	Ours	0.776 (0.199)	0.795 (0.186)	0.809 (0.161)	0.821 (0.155)	0.824 (0.148)
	Random selection	0.767 (0.208)	0.789 (0.198)	0.802 (0.177)	0.818 (0.165)	0.824 (0.148)
	Uniform selection	0.759 (0.218)	0.770 (0.185)	0.799 (0.171)	0.814 (0.163)	0.824 (0.148)
PED	Ours	0.646 (0.206)	0.676 (0.209)	0.691 (0.215)	0.704 (0.207)	0.724 (0.196)
	Random selection	0.633 (0.221)	0.651 (0.227)	0.687 (0.217)	0.689 (0.228)	0.724 (0.196)
	Uniform selection	0.620 (0.206)	0.659 (0.209)	0.673 (0.218)	0.676 (0.237)	0.724 (0.196)
Choroid	Ours	0.875 (0.076)	0.879 (0.077)	0.886 (0.066)	0.891 (0.076)	0.895 (0.073)
	Random selection	0.872 (0.071)	0.876 (0.078)	0.881 (0.080)	0.884 (0.079)	0.895 (0.073)
	Uniform selection	0.872 (0.087)	0.875 (0.078)	0.880 (0.086)	0.890 (0.084)	0.895 (0.073)