功能描述已经功能行的约束，我们要用这个程序实现呢-Functional descr iption of the functional line constraints, we have to use this program to achieve it Rongrong

Active contours or \snakes" can be used to segment objects automatically. The basic idea is the evolution of a curve, or curves subject to constraints from the input data. The curve should evolve until its boundary segments the object of intere