We propose a deblurring algorithm that explicitly takes into account the sparse characteristics of natural images and does not entail solving a numerically ill-conditioned backward-diffusion. The key observation is that the sparse coefficients that encode a given image with respect to an over-complete basis are the same that encode a blurred version of the image with respect to a modified basis. Following an “analysis-by-synthesis” approach, an explicit generative model is used to compute a sparse representation of the blurred image, and its coefficients are used to combine elements of the original basis to yield a restored image.
Direct Sparse Deblurring
Y. Lou,A. Bertozzi,Stefano Soatto
Published 2010 in Journal of Mathematical Imaging and Vision
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2010
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Journal of Mathematical Imaging and Vision
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Unknown publication date
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Mathematics, Computer Science
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