人脸建模及嘴部驱动技术

Facial modeling and mouth-driven technology

提出了一种基于解剖学和生物力学的嘴部驱动方法,首先根据人脸各部位不同的外观特征、解剖学结构及力学特征,分别构建人脸各部位的几何模型;建立嘴部所受施力与其应变间的非线性关系;最后,综合影响人脸运动变形的两方面因素——受力人脸各部位的运动力学性质及施力肌肉的控制模型,合成面部表情。实验结果表明,相比线性驱动方法,该方法较好地模拟出人脸的力学性质及运动特征,驱动得到真实细腻的人脸表情;在嘴部驱动方面,由于采用非线性方法,可以完成较复杂的嘴部变化,运动效果更加真实。

This paper presents a mouth-driven approach based on Anatomy and Biomechanics.Firstly,considering the different appearance characteristics,anatomical structures and mechanical characteristics,various parts of the facial geometry model were constructed separately;stress-strain non-linear relationship of the mouth was established.Finally,by taking mechanical properties of various parts of human face（stress）,and controlling model of the muscle（strain）into consideration,the facial expressions were synthesized.Compared with linear-driven method,experimental results show that this approach can simulate mechanics properties and motion characteristics of human face realistically,and get complex changes in the mouth.As the result of non-linear method,driven-effect is more realistic.