1. GEOTEC Research Group Institute of New Imaging Technologies (INIT) Universitat Jaume I Castellon de la Plana Spain
2. Department of Computer Science University of Cuenca Cuenca Ecuador
3. Centro de Investigación en Computación Instituto Politécnico Nacional Mexico City Mexico
4. Faculty of Computer Science CITIC Research Center Universidade da Coruña A Coruña Spain
5. Faculty of Technology and Applied Sciences Universidad Nacional de Catamarca San Fernando del Valle de Catamarca Argentina