关键词: 人脸 特征提取 Snakes方法 能量函数

Abstract:

In this paper, we make some improvements on the energy function of the conventional Snakes：（1） we put forward a new energy item （named shape energ y item） to restrain the shape of the Snakes when it moves, this results in better images close to the corresponding facial features; （2） we improve t the image energy item by replacing the gray gradient with the chroma gradient. For the chroma gradient contains substantial information of colour, this improvement is helpful for the Snakes to converge to the correct contour in the image. The results of our experiments show that the improved Snakes is robust in the extraction of facial features.

Key words: （face, feature extraction, Snakes, energy function）