提出了一种基于活动轮廓的运动目标动态分割方法。利用Ｂ样条曲线表示活动轮廓，导出了B样要曲线控制点的运动模型，从而使得活动轮廓能自动地跟踪运动目标的边缘，实现运动目标的动态分割。同时我们还提出了控制点数目的自动确定方法。实验结果验证了该方法的有效性。

A dynamic segmentation of moving targets based on an active contour is presented in this paper.Utilizing that the active contour is a B spline curve, the way for design the num ber of controlpoints is given. Meanwhile, the motion of B spline controlpoints is derived from the im age data, so that the active contourcan track the edge of moving object automatically and dynamic segmentation is performed. Experimental results are also included to show the feasibility of the newly presented method.