关键词: 李群, 肤色, 人脸检测, 人脸跟踪

Abstract: Current template-matching based face tracking algorithm can not deal with the variation of faces while tracking. This paper firstly introduces Lie groups and the model of skin tone, gets the best ellipse to approximate the face contour using affine transformations on Lie groups. Next it presents an algorithm to get rid of the dependence of initial position in the problem of face tracking on the basis of model of skin tone. At last, it proposes an algorithm to track faces in videos. The experimental results demonstrate that the algorithms proposed can detect faces very well, adapt to the variation of faces, and improve the adaptability in tracking process.

Key words: Lie group, skin tone, face detection, face tracking