Abstract：Image segmentation is a key problem in image processing. Curve evolution

which is very difficult to solve previously

was effectively handled by level set method proposed by Osher and Sethian. At present

there are so many image segmentation methods based on level set

and there are different methods to different images. Now

these methods are continually improved to enhance the speed and the veracity. So in this paper

according to the development of the image segmentation methods based on level set

this algorithm is introduced for readers of different backgrounds in this field to use.