Geometric Estimation with Orthogonal Bandlet Bases
Langue
en
Communication dans un congrès
Ce document a été publié dans
Proceedings of SPIE, the International Society for Optical Engineering, Proceedings of SPIE, the International Society for Optical Engineering, 2007-08-26, San Diego, CA. 2007-09-20, vol. 6701, n° 2, p. 67010M.1-67010M.10
SPIE
Résumé en anglais
This article presents the first adaptive quasi minimax estimator for geometrically regular images in the white noise model. This estimator is computed using a thresholding in an adapted orthogonal bandlet basis optimized ...Lire la suite >
This article presents the first adaptive quasi minimax estimator for geometrically regular images in the white noise model. This estimator is computed using a thresholding in an adapted orthogonal bandlet basis optimized for the noisy observed image. In order to analyze the quadratic risk of this best basis denoising, the thresholding in an orthogonal bandlets basis is recasted as a model selection process. The resulting estimator is computed with a fast algorithm whose theoretical performance can be derived. This efficiency is confirmed through numerical experiments on natural images.< Réduire
Mots clés en anglais
Bandlets
denoising
geometric estimation
wavelets
estimation
minimax
Origine
Importé de halUnités de recherche