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

Author

Xu, Hao ; Xu, Jizheng ; Wu, Feng

Author_Institution

Dept. Electron. Eng. & Inf. Sci., Univ. of Sci. & Tech. of China, Hefei

fYear

2008

fDate

12-15 Oct. 2008

Firstpage

545

Lastpage

548

Abstract

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.

Keywords

compensation; filtering theory; image denoising; image restoration; compensation image; image processing; image restoration; mean conservation; nonlocal means filter; post-compensation scheme; zero-mean noise; AWGN; Additive white noise; Asia; Gaussian noise; Image restoration; Information filtering; Information filters; Information science; Internet; Noise reduction; Nonlocal Means filter; image restoration; mean conservation;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

San Diego, CA

ISSN

1522-4880

Print_ISBN

978-1-4244-1765-0

Electronic_ISBN

1522-4880

Type

conf

DOI

10.1109/ICIP.2008.4711812

Filename

4711812