Adaptive L-filters with applications in signal and image processing

Les filtres de statistique d'ordre (L-filtres) adaptatifs bases sur des statistiques locales des signaux sont introduits dans cet article. De tels estimateurs sont particulierement effectifs pour le filtrage de signaux corrompus par plus d'un type de bruit, par exemple un bruit blanc additif plus des impulsions. Dans le but d'ameliorer encore les performances de filtrage (capacite de preservation des details), des structures de L-filtrage adaptatif ont ete combinees avec des operations de median pondere, ce qui permet d'exploiter l'information temporelle qui est perdue par la mise en ordre inherente au L-filtrage. Des resultats de simulation sont inclus pour mettre en evidence les performances des structures adaptatives proposees pour des signaux mono- et bi-dimensionnels

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