计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (16): 188-189.DOI: 10.3778/j.issn.1002-8331.2009.16.055

• 图形、图像、模式识别 • 上一篇    下一篇

实现测地线活动轮廓模型的改进变分水平集方法

张玲艳,闫 丽,陈 颖,张 欢   

  1. 西北大学 电子信息科学与技术学院,西安 710127
  • 收稿日期:2008-04-02 修回日期:2008-05-30 出版日期:2009-06-01 发布日期:2009-06-01
  • 通讯作者: 张玲艳

Variational level set method based on geodesic active contour

ZHANG Ling-yan,YAN Li,CHEN Ying,ZHANG Huan   

  1. College of Information Science and Technology,Northwest University,Xi’an 710127,China
  • Received:2008-04-02 Revised:2008-05-30 Online:2009-06-01 Published:2009-06-01
  • Contact: ZHANG Ling-yan

摘要: 传统的实现测地线活动轮廓(Geodesic Active Contour,GAC)模型的水平集方法中,采用迎风方案作数值求解,需要使用足够小的时间步长,在曲线演化的过程中需要重新初始化,故效率低,据此,给出一种基于测地线活动轮廓模型的变分水平集方法,引入了一个水平集函数的强制项,避免了重新初始化,简化了初始化的工作,通过实验证明了这种方法是有效的,稳定的。

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