1. Edge focusing;Bergholm;IEEE Trans. Pattern Anal. Mach. Intell.,1987
2. Edge detection in biological and artificial visual systems;Burr,1990
3. A non-linear model of feature detection;Burr,1991
4. A computational approach to edge detection;Canny;IEEE Trans. Pattern Anal. Mach. Intell.,1986
5. Least-squares image estimation on a multi-resolution pyramid;Clippingdale,1989