1. Computer Science Faculty, University of Mohamed Boudiaf – USTOMB, Oran, Algeria
2. Ecole Normale Supérieure d'Oran, Orans, Algérie
3. Department of Earth Observation, Center of Space Techniques, Arzew, Algeria
4. Computer Science Department, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain