Fourth international workshop on human behavior understanding (HBU 2013)

With advances in pattern recognition and multimedia computing, it became possible to analyze human behavior via multimodal sensors, at different time-scales and at different levels of interaction and interpretation. This ability opens up enormous possibilities for multimedia and multimodal interaction, with a potential of endowing the computers with a capacity to attribute meaning to users' attitudes, preferences, personality, social relationships, etc., as well as to understand what people are doing, the activities they have been engaged in, their routines and lifestyles. This workshop gathers researchers dealing with the problem of modeling human behavior under its multiple facets with particular attention to interactions in arts, creativity, entertainment and edutainment.