Edge detection schemes based on Prewitt, Sobel, and Roberts operators are realized using optical symbolic substitution. The corresponding optical systems are compared in terms of hardware and performance.
© 1989 Optical Society of America
Abdallah K. Cherri and Mohammad A. Karim, "Optical symbolic substitution: edge detection using Prewitt, Sobel, and Roberts operators," Appl. Opt. 28, 4644-4648 (1989)