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Title: Parameterized facial expression synthesis based on MPEG-4
Authors: Raouzaiou, Amaryllis 
Tsapatsoulis, Nicolas 
Karpouzis, Kostas 
Kollias, Stefanos D. 
Keywords: Facial expression;MPEG-4 facial definition parameters;Activation;Parameterized expression synthesis
Issue Date: 2002
Publisher: Hindawi
Source: EURASIP Journal on Applied Signal Processing, Vol. 2002, no. 10, 2002, pp. 1021-1038
Abstract: In the framework of MPEG-4, one can include applications where virtual agents, utilizing both textual and multisensory data, including facial expressions and nonverbal speech help systems become accustomed to the actual feelings of the user. Applications of this technology are expected in educational environments, virtual collaborative workplaces, communities, and interactive entertainment. Facial animation has gained much interest within the MPEG-4 framework; with implementation details being an open research area (Tekalp, 1999). In this paper, we describe a method for enriching human computer interaction, focusing on analysis and synthesis of primary and intermediate facial expressions (Ekman and Friesen (1978)). To achieve this goal, we utilize facial animation parameters (FAPs) to model primary expressions and describe a rule-based technique for handling intermediate ones. A relation between FAPs and the activation parameter proposed in classical psychological studies is established, leading to parameterized facial expression analysis and synthesis notions, compatible with the MPEG-4 standard.
DOI: 10.1155/S1110865702206149
Rights: © 2002 Raouzaiou et al.
Type: Article
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