这是一篇利用非线性扩散方程进行去噪的文章，在文章中说明了如何在去噪和保持边缘间达到一个较好的平衡。-This is a nonlinear diffusion equation denoising article The article explains how the denoising and maintain an edge among achieve a better balance.

PhD thesis on nonlinear diffusion filtering of images using the topological gradient approach to edges detection

Although it has been proven to be particularly effective in many applications,EMD method has several drawbacks. The major problem with EMD is the lack of theoretical Framework which leads to difficulties for the characterization and evaluatio