<FONT face=Verdana>Image segmentation is a classic problem in computer vision
and become a hot topic in the field of image understanding.The research actuality and new progress in image segmentation in recent years are summarized in this paper.Firstly
the traditional methods of image segmentation are introduced summarily.Then
the specific theory for image segmentation
including morphology
fuzzy sets and neural netwo<FONT face=Verdana>rk
support vector machine
immune algorithm
graph theory and granular computing
are presented emphatically.Furthermore
several new representative papers with the application of each theory are analyzed and discussed.Finally
the development trend of image segmentation method is discussed.