首先设定域值分割，把基本的轮廓找出来，见图中蓝色轮廓线，再将轮廓点传入cvSnakeImage函数，计算出绿色的snake轮廓线。

其中参数alpha代表点相互靠拢的权值(0-1.0)，beta表示弯曲能量（越小越容易弯曲）(0-1.0)，gamma表示整体能量(0-1.0)。其中参数我自己也不确定具体的范围，最好自己更改不同的范围试试.-First set the threshold segmentation, find out the basic outline, blue contour lines in Figure, and then contour points incoming cvSnakeImage function to calculate the green snake contour.

Where the parameter alpha representative points closer to each other weights (0-1.0), beta represents the bending energy (smaller and more easily bent) (0-1.0), gamma represents the total energy (0-1.0). I am not sure where the parameters specific range, best to try to change their different ranges.