Un algorithme efficace de reconnaissance de l'iris a �t� d�velopp� sur la base du principe de J. Daugman. L'algorithme de J. Daugman localise d'abord les limites pupillaires et limbiques de l'iris � l'aide d'un op�rateur int�gro-diff�rentiel qui trouve le cercle dans l'image o� l'intensit� change le plus rapidement par rapport aux variations du rayon. Les param�tres cl�s sont les suivants : - *l'algorithme de Daugman le plus efficace et le plus pr�cis *la technique de pr�traitement *les points forts de la mise en œuvre de l'algorithme bas� sur J. Daugman sur des images de l'iris *les r�sultats de la simulation montrent les r�sultats des diff�rentes simulations effectu�es sur des images de l'iris *les conclusions et les perspectives d'avenir mettent en �vidence les r�sultats des travaux de recherche.

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