Contrast re-enhancement of Total-Variation regularization jointly with the Douglas-Rachford iterations

Abstract : Restoration of a piece-wise constant signal can be performed using anisotropic Total-Variation (TV) regularization. Anisotropic TV may capture well discontinuities but suffers from a systematic loss of contrast. This contrast can be re-enhanced in a post-processing step known as least-square refitting. We propose here to jointly estimate the refitting during the Douglas-Rachford iterations used to produce the original TV result. Numerical simulations show that our technique is more robust than the naive post-processing one.
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https://hal.archives-ouvertes.fr/hal-01187061
Contributor : Charles-Alban Deledalle <>
Submitted on : Wednesday, August 26, 2015 - 2:31:56 AM
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  • HAL Id : hal-01187061, version 1

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Charles-Alban Deledalle, Nicolas Papadakis, Joseph Salmon. Contrast re-enhancement of Total-Variation regularization jointly with the Douglas-Rachford iterations. Signal Processing with Adaptive Sparse Structured Representations, Jul 2015, Cambridge, United Kingdom. ⟨hal-01187061⟩

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