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Fusion of regularization terms for image restoration

[+] Author Affiliations
Max Mignotte

Université de Montréal, Département d’Informatique et de Recherche Opérationnelle, CP 6128 Succ. Centre-ville, H3C 3J7, Montréal, Québec, Canada

J. Electron. Imaging. 19(3), 033004 (July 23, 2010). doi:10.1117/1.3466799
History: Received September 01, 2009; Revised May 11, 2010; Accepted June 08, 2010; Published July 23, 2010; Online July 23, 2010
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We propose an efficient regularized restoration model associating a spatial and a frequential regularizer in order to better model the intrinsic properties of the original image to be recovered and to obtain a better restoration result. An adaptive and rescaling scheme is also proposed to balance the influence of these two different regularization constraints, preventing an overwhelming importance for one of them from prevailing over the other, enabling them to be efficiently fused during the iterative deconvolution process. This hybrid regularization approach, mixing these two constraints and, more precisely, favoring a solution image that is both efficiently denoised [due to the denoising ability of a thresholding procedure in the discrete cosine transform (DCT) domain] and edge-preserved [due to the generalized Gaussian Markov random field (GGMRF) constraint]; yields significant improvements in terms of image quality and higher signal-to-noise ratio improvement results compared to a single GGMRF or DCT prior model and leads to competitive restoration results in benchmark tests, for various levels of blur, blurred signal to noise ratio (BSNR), and noise degradations.

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© 2010 SPIE and IS&T

Citation

Max Mignotte
"Fusion of regularization terms for image restoration", J. Electron. Imaging. 19(3), 033004 (July 23, 2010). ; http://dx.doi.org/10.1117/1.3466799


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