A multiresolution framework for local similarity based image denoising

Authors:
Nasir Rajpoot;Irfan Butt
Affiliations:
Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK;Banque Saudi Fransi, Riyadh, Saudi Arabia
Venue:
Pattern Recognition
Year:
2012

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Abstract

In this paper, we present a generic framework for denoising of images corrupted with additive white Gaussian noise based on the idea of regional similarity. The proposed framework employs a similarity function using the distance between pixels in a multidimensional feature space, whereby multiple feature maps describing various local regional characteristics can be utilized, giving higher weight to pixels having similar regional characteristics. An extension of the proposed framework into a multiresolution setting using wavelets and scale space is presented. It is shown that the resulting multiresolution multilateral (MRM) filtering algorithm not only eliminates the coarse-grain noise but can also faithfully reconstruct anisotropic features, particularly in the presence of high levels of noise.