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• W1675746993 abstract "Ill-posed inverse problems are commonplace in biomedical image processing. Their solution typically requires imposing prior knowledge about the latent ground truth. While this regularizes the problem to an extent where it can be solved, it also biases the result toward the expected. With inappropriate priors harming more than they use, it remains unclear what prior to use for a given practical problem. Priors are hence mostly chosen in an {em ad hoc} or empirical fashion. We argue here that the gradient distribution of natural-scene images may provide a versatile and well-founded prior for biomedical images. We provide motivation for this choice from different points of view, and we fully validate the resulting prior for use on biomedical images by showing its stability and correlation with image quality. We then provide a set of simple parametric models for the resulting prior, leading to straightforward (quasi-)convex optimization problems for which we provide efficient solver algorithms. We illustrate the use of the present models and solvers in a variety of common image-processing tasks, including contrast enhancement, noise level estimation, denoising, blind deconvolution, zooming/up-sampling, and dehazing. In all cases we show that the present method leads to results that are comparable to or better than the state of the art; always using the same, simple prior. We conclude by discussing the limitations and possible interpretations of the prior." @default.
• W1675746993 created "2016-06-24" @default.
• W1675746993 creator A5022214509 @default.
• W1675746993 creator A5086192598 @default.
• W1675746993 date "2014-08-13" @default.
• W1675746993 modified "2023-10-16" @default.
• W1675746993 title "Gradient Distribution Priors for Biomedical Image Processing" @default.
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• W1675746993 doi "https://doi.org/10.48550/arxiv.1408.3300" @default.
• W1675746993 hasPublicationYear "2014" @default.
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