Image restoration plays an important role in both the quantitative analysis and qualitative analysis of image. It directly affects the further works of analysis and processing. At present, a large number of image restoration methods are recorded in the literatures. And image restoration method based on partial differential equations(PDEs) is one of the main tools in this area. Although these methods often seem powerless for the images with complex features, image restoration method based on PDEs still has its advantages cannot be replaced. In this paper, we make a summary and appraisal on image restoration methods based on PDEs on basis of the analysis for image characteristics and predict the development trend of image restoration methods based on PDEs.
