关键词: 图像分割, 先验形状, 主动轮廓模型, Mumford-Shah模型, 水平集

Abstract: The active contour segmentation based on prior shape and M-S model has been widely used in image segmentation because of their computational efficiency and stability.Based on level set method，the novel model using the active contour model，prior shape and Mumford-Shah model can control evolvement of curve.Prior knowledge on certain object is a useful guidance in image segmentation.It exploits the prior knowledge of desired object’s shape through a Principle Component Analysis（PCA） method.By numerical experiments presented in the paper，the proposed approach is robust to cluttered background，partial occlusions，missing and noise with the specific shape.

Key words: image segmentation, shape prior, active contour model, Mumford-Shah model, level set