Expressive MPEG-4 Facial Animation Using Quadratic Deformation Models (2010)
Type of ContentConference Contributions - Published
PublisherUniversity of Canterbury. Computer Science and Software Engineering
University of Canterbury. Human Interface Technology Laboratory
AuthorsObaid, M., Mukundan, R., Billinghurst, M., Pelachaud, C.show all
In this paper we propose an approach compliant with the MPEG-4 standard to synthesize and control facial expressions generated using 3D facial models. This is achieved by establishing the MPEG-4 facial animation standard conformity with the quadratic deformation model representations of facial expressions. This conformity allows us to utilize the MPEG-4 facial animation parameters (FAPs) with the quadratic deformation tables, as a higher layer, to compute the FAP values. The FAP values for an expression E are computed by performing a linear mapping between a set of transformed MPEG-4 FAP points (using quadratic deformation models) and the 3D facial model semantics. The nature of the quadratic deformation model representations of facial expressions can be employed to synthesize and control the six main expressions (smile, sad, fear, surprise, anger, and disgust). Using Whissel’s psychological studies on emotions we compute an interpolation parameter that is used to synthesize intermediate facial expressions. The paper presents results of experimental studies performed using the Greta embodied conversational agent. The achieved results are promising and can lead to future research in synthesizing a wider range of facial expressions.
CitationObaid, M., Mukundan, R., Billinghurst, M., Pelachaud, C. (2010) Expressive MPEG-4 Facial Animation Using Quadratic Deformation Models. Sydney, Australia: 2010 7th International Conference on Computer Graphics, Imaging and Visualization (CGIV), 7-10 Aug 2010. 9-14.
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KeywordsMPEG-4 facial animation; quadratic deformation models; facial animation; facial expression synthesis
ANZSRC Fields of Research08 - Information and Computing Sciences::0801 - Artificial Intelligence and Image Processing::080106 - Image Processing
19 - Studies in the Creative Arts and Writing::1902 - Film, Television and Digital Media::190202 - Computer Gaming and Animation
01 - Mathematical Sciences::0101 - Pure Mathematics::010102 - Algebraic and Differential Geometry