1. Digital image processing algorithms and applications;Pitas,2000
2. Nonlinear image processing;Mitra,2000
3. Novak CL, Shafer SA. Color edge detection. In: Proc. DARPA image understanding workshop, LosAngeles, CA, USA; 1987. p. 35–37.
4. A computational approach to edge detection;Canny;IEEE Trans Pattern Anal Mach Intell,1986
5. Theory of edge detection;Marr;Proc Roy Soc London B,1980