Blind deconvolution of images with model discrepancies using maximum a posteriori estimation with heavy-tailed priors

Jan Kotera; Filip Šroubek

doi:10.1117/12.2077158

27 February 2015 Blind deconvolution of images with model discrepancies using maximum a posteriori estimation with heavy-tailed priors

Jan Kotera, Filip Šroubek

Author Affiliations +

Proceedings Volume 9404, Digital Photography XI; 94040B (2015) https://doi.org/10.1117/12.2077158
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

Abstract

Single image blind deconvolution aims to estimate the unknown blur from a single observed blurred image and recover the original sharp image. Such task is severely ill-posed and typical approaches involve some heuristic or other steps without clear mathematical explanation to arrive at an acceptable solution. We show that a straight- forward maximum a posteriori estimation incorporating sparse priors and mechanism to deal with boundary artifacts, combined with an efficient numerical method can produce results which compete with or outperform much more complicated state-of-the-art methods. Our method is naturally extended to deal with overexposure in low-light photography, where linear blurring model is violated.

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Jan Kotera and Filip Šroubek "Blind deconvolution of images with model discrepancies using maximum a posteriori estimation with heavy-tailed priors", Proc. SPIE 9404, Digital Photography XI, 94040B (27 February 2015); https://doi.org/10.1117/12.2077158

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