Improved radial basis function based parameterization for facial expression animation
Zhida Li, Ji Ma, Hsi-Yung Feng · 2014
This paper presents an improved method for facial expression animation based on the radial basis functions. The existing facial action coding system is adopted for expression parameterization. A set of parameters that are able to generate proper expressions is carefully selected through a series of analyses and comparisons. A deformation algorithm combining compactly supported radial basis functions with a geodesic distance metric is employed to address the difficulties in generating facial expressions, such as localized deformation and hole handling. In this work, the complex manipulation of a 3D face mesh is transformed into simple linear parameter adjustments, which is intuitive and efficient. Implementation results have demonstrated that real-time interactive mesh modification for facial expression animation is achieved.