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

Table 4

The statistical comparison for SNR parameter with the competitors on BSD500.

SNR (dB)
BSD image no.	Prewitt	Sobel	Canny	FGTED
189080	−43.0911	−43.4553	−42.8961	−43.3736
42049	−44.5938	−46.1048	−45.3154	−46.0563
118035	−43.2846	−43.0518	−42.3015	−43.0003
163014	−40.2579	−44.2129	−43.3452	−43.9134
135069	−42.2813	−46.5587	−45.5488	−46.4761
189011	−42.0332	−44.6548	−44.3711	−44.564
189080	−40.7244	−45.5497	−45.1886	−45.4726