Guillermo Calvo, Bruno Baruque, Emilio Corchado. Study of the Pre-processing Impact in a Facial Recognition System. In Jeng-Shyang Pan, Marios M. Polycarpou, Michal Wozniak, André C. P. L. F. Carvalho, Héctor Quintián-Pardo, Emilio Corchado, editors, Hybrid Artificial Intelligent Systems - 8th International Conference, HAIS 2013, Salamanca, Spain, September 11-13, 2013. Proceedings. Volume 8073 of Lecture Notes in Computer Science, pages 334-344, Springer, 2013. [doi]