Contrast re-enhancement of Total-Variation regularization jointly with the Douglas-Rachford iterations - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2015

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

Résumé

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.
Fichier principal
Vignette du fichier
sparshal.pdf (143.43 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01187061 , version 1 (26-08-2015)

Identifiants

  • HAL Id : hal-01187061 , version 1

Citer

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 (SPARS'15), Jul 2015, Cambridge, United Kingdom. ⟨hal-01187061⟩
230 Consultations
137 Téléchargements

Partager

Gmail Facebook X LinkedIn More