1. Computer Science Laboratory of Franche-Comté, UFR Sciences and Techniques, University of Franche-Comté, Besançon, France. U.R. Sciences and Technologies of Image and Telecommunications, Higher Institute of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.
2. U.R. Sciences and Technologies of Image and Telecommunications, Higher Institute of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.
3. Computer Science Laboratory of Franche-Comté, UFR Sciences and Techniques, University of Franche-Comté, Besançon, France.