摘要： 提出了一种分阶段的主动轮廓新算法。对源图进行一层小波分解,获得源图的一幅近似图。在发展阶段,主动轮廓作用在近似图中,并采用贪心算法使主动轮廓逐渐收敛到轮廓附近。在成熟阶段,主动轮廓作用在源图中,采用B样条形式,并使用动划算法达到全局最优。试验证明,这种算法具有收敛效果好、速度快的特点。

关键词: 分阶段, 方向可调滤波器, B样条, 动态规划

Abstract: A multi-stage active contour algorithm is present in this paper. The original image is analyzed with one-level wavelet, and then an approximate image can be obtained. In the growing stage, active contour is attracted to the vicinity of the approximate image by using greedy method. In adult stage, the B-spline shape is used for active contour in the original image. And the dynamic programming algorithm makes it the global best. Experiment proves that active contour could converge fast to the real contour, and fits it well.

中图分类号: 

• TP391.41