facial color expression面色表情
Emotion and Facial expression情绪与面部表情
very cute facial expression很可爱的表情
lifeless in facial expression脸上表情呆滞
A facial expression一个表情而已
facial expression classification和面孔表情分类;面孔表情分类
facial expression database人脸表情数据库
The recognition of facial expression.
表情识别：首先介绍了对脸部图像的预处理操作。
At last, we research facial expression and imitate human’s smile.
并且研究了人的面部表情，模拟出人微笑的表情。
参考来源 - 三维人体变形技术研究