双活动轮廓模型

Double active contours

针对形变模型方法存在压力太大活动轮廓容易从弱边界处溢出,压力太小则不能推动活动轮廓移动的压力项选择,提出基于双活动轮廓的形变模型。该模型建立内外活动轮廓的对应和约束,根据约束控制内外活动轮廓的演化;并可捕捉凹陷区域边界,且通过内外活动轮廓界定出弱边界区域。

One of the problems of active contour model is that how to choose the press force.If the press is too high,the active contour may across the weak boundary or the active contour can＇t be driven by press.This paper introduced a novel deformable model based on double active contours.Correspondence and constraint was set up between the inner and outer contours.Then the active contours evolved under the contour constraint.The novel deformable model could catch the boundary of the concave region,and determined weak boundary by the coupled active contours.