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MPEG-4 facial expression synthesis

✍ Scribed by L. Malatesta; A. Raouzaiou; K. Karpouzis; S. Kollias

Book ID
106235265
Publisher
Springer
Year
2007
Tongue
English
Weight
305 KB
Volume
13
Category
Article
ISSN
1617-4909

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✦ Synopsis

The current work will describe an approach to synthesize expressions, including intermediate ones, via the tools provided in the MPEG-4 standard based on real measurements and on universally accepted assumptions of their meaning, taking into account results of Whissel's study. Additionally, MPEG-4 facial animation parameters are used in order to evaluate theoretical predictions for intermediate expressions of a given emotion episode, based on Scherer's appraisal theory. MPEG-4 FAPs and action units are combined in modeling the effects of appraisal checks on facial expressions and temporal evolution issues of facial expressions are investigated. The results of the synthesizing process can then be applied to Embodied Conversational Agents (ECAs), rendering their interaction with humans, or other ECAs, more affective.

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