Recognition of Primary Emotions Using the Paradigm of Intelligent Agents for the Recognition of Subtle Facial Expressions. - Enrique Aguirre; Arnulfo Alanis Garza; María del Rosario Baltazar-Flores; Lenin-G. Lemus-Zúñiga; José Sergio Magdaleno-Palencia; Carlos Lino Ramírez (KES-AMSTA, 2015)