G.-H. Cottet, L. Germain, Image Processing through Reaction Combined with Nonlinear Diffusion, Mathematics of Computation, Vol. 61, No. 204 (Oct., 1993), pp. 659-673. Free online reading for over 10 ...

We've covered steps 1 and 2 in the Image Convolution section. Gradients using Sobel Kernels did a pretty good job of detecting edges in an image all on their own. Canny's algorithm, does a ...