title: Building robust wavelet estimators for multicomponent images using Stein's principle.
abstract: Multichannel imaging systems provide several observations of the same scene which are often corrupted by noise. In this paper, we are interested in multispectral image denoising in the wavelet domain. We adopt a multivariate statistical approach in order to exploit the correlations existing between the different spectral components. Our main contribution is the application of Stein's principle to build a new estimator for arbitrary multichannel images embedded in additive Gaussian noise. Simulation tests carried out on optical satellite images show that the proposed method outperforms conventional wavelet shrinkage techniques.
authors.affiliation: Unité de Recherche en Imagerie Satellitaire et ses Applications, Ecole Supérieure des Communications (SUP'COM), Tunis, Tunisia. ben.yahia@planet.tn
authors.forename: Amel
authors.initials: A
authors.lastname: Benazza-Benyahia
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Pesquet
mesh_terms: D000465:Algorithms; D016477:Artifacts; D001185:Artificial Intelligence; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods*; D015233:Models, Statistical; D009716:Numerical Analysis, Computer-Assisted; D012815:Signal Processing, Computer-Assisted; D013269:Stochastic Processes