Bilinear interpolation for facial expression and metamorphosis in real-time animation |
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Authors: | Kiyoshi Arai Tsuneya Kurihara Ken-ichi Anjyo |
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Affiliation: | (1) Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, 185 Kokubunji, Tokyo, Japan;(2) Hitachi Research Laboratory, Hitachi Ltd., 7-1-1 Omika, 319-12 Hitachi, Ibaraki, Japan |
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Abstract: | This paper describes a new method for generating facial animation in which facial expression and shape can be changed simultaneously in real time. A 2D parameter space independent of facial shape is defined, on which facial expressions are superimposed so that the expressions can be applied to various facial shapes. A facial model is transformed by a bilinear interpolation, which enables a rapid change in facial expression with metamorphosis. The practical efficiency of this method has been demonstrated by a real-time animation system based on this method in live theater. |
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Keywords: | Real-time facial animation Facial shape Facial expression 2D parameter space Bilinear interpolation |
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