Improved nonlocal means method based on adaptive pre-classification for image denoising

Shaorong He; Yaping Lin; Yonghe Liu; Junfeng Yang; Hongyan Jiang

doi:10.1117/12.2243996

29 August 2016 Improved nonlocal means method based on adaptive pre-classification for image denoising

Shaorong He, Yaping Lin, Yonghe Liu, Junfeng Yang, Hongyan Jiang

Proceedings Volume 10033, Eighth International Conference on Digital Image Processing (ICDIP 2016); 100331S (2016) https://doi.org/10.1117/12.2243996
Event: Eighth International Conference on Digital Image Processing (ICDIP 2016), 2016, Chengu, China

Abstract

Nonlocal Means is an effective denoising method, which takes advantage of the fact that natural image has selfsimilarity. However, the original nonlocal means may not find enough similar candidates for some non-repetitive image blocks. In order to mitigate these drawbacks, we propose an improved nonlocal means method using adaptive preclassification in this paper. The proposed method employs the threshold-based clustering algorithm to classify noisy image blocks adaptively. Then, a rotational block matching method is adopted to find the appropriate distance measurement between two blocks in an image. Experimental results on a set of well-known standard images show that the proposed method is effective, especially when the image contains large amount of noise.

Citation Download Citation

Shaorong He, Yaping Lin, Yonghe Liu, Junfeng Yang, and Hongyan Jiang "Improved nonlocal means method based on adaptive pre-classification for image denoising", Proc. SPIE 10033, Eighth International Conference on Digital Image Processing (ICDIP 2016), 100331S (29 August 2016); https://doi.org/10.1117/12.2243996

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