Abstract
Image restoration based on partial differential equations (PDEs) is an effective approach. However, most of the methods are based on using a local window, such as a 3×3 mask, operating on images. As a consequence, the anisotropic diffusion process seeks the local mode of a density when performing repeatedly, which may degrade the image details. However, a non-local (NL) algorithm can take advantage of all the possible self-predictions provided by the image. In this paper, image restoration based on PDEs is discussed and a NL algorithm is proposed. Experiments show that this method using the NL algorithm can improve the performance efficiently and significantly.
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