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Green Image
Issue No. 01 - January/February (2006 vol. 12)
ISSN: 1077-2626
pp: 48-60
<p><b>Abstract</b>—Expression mapping (also called performance driven animation) has been a popular method for generating facial animations. A shortcoming of this method is that it does not generate expression details such as the wrinkles due to skin deformations. In this paper, we provide a solution to this problem. We have developed a geometry-driven facial expression synthesis system. Given feature point positions (the <it>geometry</it>) of a facial expression, our system automatically synthesizes a corresponding expression image that includes photorealistic and natural looking expression details. Due to the difficulty of point tracking, the number of feature points required by the synthesis system is, in general, more than what is directly available from a performance sequence. We have developed a technique to infer the missing feature point motions from the tracked subset by using an example-based approach. Another application of our system is expression editing where the user drags feature points while the system interactively generates facial expressions with skin deformation details.</p>
Facial animation, expression mapping, expression details, facial expressions, performance-driven animation.

"Geometry-Driven Photorealistic Facial Expression Synthesis," in IEEE Transactions on Visualization & Computer Graphics, vol. 12, no. , pp. 48-60, 2006.
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