用于高真实感口型合成的唇区肌肉模型

Muscle-based Lips Model for Realistic Lips Synthesis

为了快速合成真实感强的口型,在Waters肌肉模型的基础上,提出了一种新的唇区肌肉模型,弥补了Waters模型对于唇区肌肉的较复杂运动描述不完全的不足。该模型以面部解剖学为基础,通过面部运动的解剖学机理的研究,将唇区的整体运动表示为若干个子运动的线性组合。该模型可用于语音驱动的动画合成。此时,只需在说话人的唇区标定少数几个特征点,就可以获得一组唇区肌肉参数,进而建立相应的肌肉模型。借助于该模型,可以在唇区附近的线性肌的联合作用下,合成说话时的各种口型。实验结果表明,该肌肉模型不仅计算代价小,且合成的口型真实感较强,具有很强的实用性。

Based on the Waters＇ muscle model（WMM）, a novel lip muscle model（LMM）is proposed in this paper. LMM perfects the inaccurate description of the complicated lip muscle movements in WMM. On the basis of facial anatomy, the global lip movement is divided into a few sub-movements. The reconstruction of the lip movement is based on the linear combination of the sub-movements. In the application of modeling talking face, several feature points are marked to obtain a group of lip parameters. All kinds of lip shapes are synthesized using the proposed LMM and the adjacent linear muscle model. The experimental results show that the proposed model is practical in view of its low computational cost and ability of producing all kinds of realistic synthesized lip shapes.