Image Edge Detection by Global Thresholding Using Riemann–Liouville Fractional Integral Operator

Table 1

The statistical comparison for SSIM with the competitors on BSD500.

SSIM
BSD image no.	Prewitt	Sobel	Canny	FGTED
189080	0.504131	0.504158	0.504166	0.50419
42049	0.761943	0.762464	0.762506	0.762484
118035	0.741948	0.742701	0.742881	0.742713
163014	0.758939	0.75914	0.759262	0.759174
135069	0.944962	0.94487	0.944853	0.944872
189011	0.708242	0.708713	0.708748	0.708742
189080	0.791261	0.792347	0.792349	0.792357