Khaled Bachir Delassi (LIM Lab, Amar Telidji University, Laghouat, Algeria), Lakhdar Zeggane (LIM Lab, Amar Telidji University, Laghouat, Algeria), Hadda Cherroun (LIM Lab, Amar Telidji University, Laghouat, Algeria), Abdelhamid Haouhat (LIM Lab, Amar Telidji University, Laghouat, Algeria), Kaoutar Bouzouad (Computer Science Dept., USTHB, Algiers, Algeria)