Image restoration by sparse 3D transform-domain collaborative filtering

Kostadin Dabov; Alessandro Foi; Vladimir Katkovnik; Karen Egiazarian

doi:10.1117/12.766355

1 March 2008 Image restoration by sparse 3D transform-domain collaborative filtering

Kostadin Dabov, Alessandro Foi, Vladimir Katkovnik, Karen Egiazarian

Proceedings Volume 6812, Image Processing: Algorithms and Systems VI; 681207 (2008) https://doi.org/10.1117/12.766355
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

We propose an image restoration technique exploiting regularized inversion and the recent block-matching and 3D filtering (BM3D) denoising filter. The BM3D employs a non-local modeling of images by collecting similar image patches in 3D arrays. The so-called collaborative filtering applied on such a 3D array is realized by transformdomain shrinkage. In this work, we propose an extension of the BM3D filter for colored noise, which we use in a two-step deblurring algorithm to improve the regularization after inversion in discrete Fourier domain. The first step of the algorithm is a regularized inversion using BM3D with collaborative hard-thresholding and the seconds step is a regularized Wiener inversion using BM3D with collaborative Wiener filtering. The experimental results show that the proposed technique is competitive with and in most cases outperforms the current best image restoration methods in terms of improvement in signal-to-noise ratio.

Citation Download Citation

Kostadin Dabov, Alessandro Foi, Vladimir Katkovnik, and Karen Egiazarian "Image restoration by sparse 3D transform-domain collaborative filtering", Proc. SPIE 6812, Image Processing: Algorithms and Systems VI, 681207 (1 March 2008); https://doi.org/10.1117/12.766355

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