1. Anisotropic Diffusion in Image Processing;Weickert,1998
2. Geometric Partial Differential Equations and Image Analysis;Sapiro,2001
3. A. Witkin, Scale-space filtering, in: Proceedings of the International Joint Conference on Artificial Intelligence, 1983, pp. 1019–1021.
4. The structure of images;Koenderink;Biol. Cybern.,1984
5. Uniqueness of the Gaussian kernel for scale-space filtering;Babaud;IEEE Trans. Pattern Anal. Mach. Intell.,1986