一种改进的几何活动轮廓模型

An improved geometry of active contour model

针对传统的几何活动轮廓模型在分割具有凹形边界时,演化曲线不能准确定位的缺点,提出了一种改进的几何活动轮廓模型,该模型通过在原模型的演化方程中增加一个正的常数项,使得演化曲线在未到达目标边界时,加速曲线演化,而在到达边界附近时,该加速项逐渐减小为零,从而能够很好的完成对凹形边界的分割.实验证明,该方法不仅能够分割具有凹形边界的目标,还能够使演化过程加速,提高几何活动轮廓模型的分割速度.

According to the traditional geometrical active contour model in segmentation is concave boundary,the curve evolution cannot accurate positioning,puts forward an improved geometry,the model of active contour model in the original model by an evolution equation of a curve evolution,make constant to target boundary,the acceleration curve evolution,and arrive in the border,acceleration of zero,thus reduce gradually to complete the segmentation of concave boundary.The experimental results prove that the method can not only segmentation is concave boundary of the target,also can make the evolution process,improve the geometry of the segmentation of active contour model.