关键词: 测地线活动轮廓模型, 变分水平集方法, 曲线演化

Abstract: In the classical level set method of implementing geodesic active contours model，upwind scheme is adopted.It needs small time step and re-initialization for every few iterations，so it is inefficient.Accordingly，this paper introduces a variational level set method based on geodesic active contours.Through introducing an enforcement for level set function，re-initialization is never needed.By experiment，the result shows that this method is effective and stable.

Key words: Geodesic Active Contour（GAC）, variational level set method, curve evolution