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A look is worth a thousand words is a popular phrase. And why is a simplelook enough to portray our feelings about something or someone? Behind thisquestion are the theoretical foundations of the field of psychology regardingsocial cognition and the studies of psychologist Paul Ekman. Facialexpressions, as a form of non-verbal communication, are the primary way totransmit emotions between human beings. The set of movements and expressions offacial muscles that convey some emotional state of the individual to theirobservers are targets of studies in many areas. Our research aims to evaluateEkman's action units in datasets of real human faces, posed and spontaneous,and virtual human faces resulting from transferring real faces into ComputerGraphics faces. In addition, we also conducted a case study with specific moviecharacters, such as SheHulk and Genius. We intend to find differences andsimilarities in facial expressions between real and CG datasets, posed andspontaneous faces, and also to consider the actors' genders in the videos. Thisinvestigation can help several areas of knowledge, whether using real orvirtual human beings, in education, health, entertainment, games, security, andeven legal matters. Our results indicate that AU intensities are greater forposed than spontaneous datasets, regardless of gender. Furthermore, there is asmoothing of intensity up to 80 percent for AU6 and 45 percent for AU12 when areal face is transformed into CG.

Can we truly transfer an actor's genuine happiness to avatars? An investigation into virtual, real, posed and spontaneous faces