Virtual Emotion to Expression: A Comprehensive Dynamic Emotion Model to Facial Expression Generation using the MPEG-4 Standard

In this paper we present a framework for generating dynamic facial expressions synchronized with speech, rendered using a tridimensional realistic face. Dynamic facial expressions are those temporal-based facial expressions semantically related with emotions, speech and affective inputs that can modify a facial animation behavior. The framework is composed by an emotion model for speech virtual actors, named VeeM (Virtual emotion-to-expression Model), which is based on a revision of the emotional wheel of Plutchik model. The VeeM introduces the emotional hypercube concept in the R4 canonical space to combine pure emotions and create new derived emotions. The VeeM model implementation uses the MPEG-4 face standard through a innovative tool named DynaFeX (Dynamic Facial eXpression). The DynaFeX is an authoring and player facial animation tool,