说明：  这几张PPT内容主要是李春明针对水平集的一些基本知识、应用展开的。
(Lichunming-- Curve evolution and level set methods: Curve Evolution: from snake to general curve evolution Level Set Methods: basic concepts and methods Numerical issues: Difference scheme: upwind scheme, ENO interpolation… Reinitialization, velocity extension … Introduction to calculus of variations and applications: Segmentation: variational level set, shape prior … Denoising: diffusion, TV)