“…Li Sen and others put forward a thresholding segmentation method of improved regional division of the two-dimensional histogram, which is a new modified algorithm direct at the traditional OTSU's problems about low Segmentation accuracy or classification error and other problems. There are many other modified thresholding segmentation algorithms [9][10][11][12]. Image segmentation based on edge detection is an important algorithm of image segmentation, as the whole, it is divided into two categories: method of differential operator and method of surface fitting.…”