Anisotropic Diffusion

The importance of multi-scale descriptions of images has been recognized from the early days of computer vision e.g. Rosenfeld and Thurston [309]. A clean formalism for this problem is the idea of scale-space filtering introduced by Witkin [386] and further developed in Koenderink [187], Babaud, Duda and Witkin[24], Yuille and Poggio [396], and Hummel [163, 164] and reviewed in the earlier sections of this book.