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.
Type de document :
Communication dans un congrès
Signal Processing with Adaptive Sparse Structured Representations, Jul 2015, Cambridge, United Kingdom. 2015
Liste complète des métadonnées


https://hal.archives-ouvertes.fr/hal-01187061
Contributeur : Charles-Alban Deledalle <>
Soumis le : mercredi 26 août 2015 - 02:31:56
Dernière modification le : samedi 18 février 2017 - 01:17:34
Document(s) archivé(s) le : vendredi 27 novembre 2015 - 10:56:20

Fichiers

sparshal.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01187061, version 1

Citation

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. 2015. <hal-01187061>

Partager

Métriques

Consultations de
la notice

180

Téléchargements du document

107