图像分割就是把图像分成若干个特定的、具有独特性质的区域并提出感兴趣目标的技术和过程。它是由图像处理到图像分析的关键步骤。现有的图像分割方法主要分以下几类：基于阈值的分割方法、基于区域的分割方法、基于边缘的分割方法-Image segmentation is the image into a number of specific, region with unique properties and proposed technologies and processes target of interest. It is a key step in the image processing to the image analysis. Existing image segmentation method is mainly divided into the following categories: segmentation method based on threshold-based segmentation based on region-based segmentation edge