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A post-compensation scheme for Nonlocal Means filter based image restoration

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3 Author(s)
Hao Xu ; Dept. Electron. Eng. & Inf. Sci., Univ. of Sci. & Tech. of China, Hefei ; Jizheng Xu ; Feng Wu

Recent nonlocal means filter (NLM) [1] is lack of mean conservation property, that is, image can have different mean before and after being processed. It is not suppose to happen when dealing with zero-mean noise. In this paper, a compensation procedure is proposed as post-process of NLM. The constraint of mean conservation is imposed on NLM through adding to the restored image of NLM with a compensation image. The compensation image is obtained via processing the method noise of NLM. Experiments show that the compensation procedure is able to significantly improve the performance of NLM.

Published in:

Image Processing, 2008. ICIP 2008. 15th IEEE International Conference on

Date of Conference:

12-15 Oct. 2008