Table 1. Segmentation performance of Retinex pre-processing algorithm with and without applied on segmentation framework.

Se: sensitivity; Sp: specificity; Acc: accuracy; AUC: area under the curve.

Dataset	Retinex	Se	Sp	Acc	AUC
DRIVE	Yes	0.744	0.978	0.953	0.861
	No	0.744	0.963	0.939	0.856
STARE	Yes	0.786	0.975	0.951	0.881
	No	0.787	0.961	0.940	0.876
ARIA	Yes	0.751	0.930	0.940	0.841
	No	0.752	0.921	0.931	0.840
VAMPIRE	Yes	0.721	0.984	0.976	0.853
	No	0.720	0.980	0.974	0.852