用于图像预处理，主要有图像灰度化，边缘检测，处理后的图像可以方便进行图像匹配-For image preprocessing, mainly gray, edge detection, can be easily processed image image matching

医学图像处理；灰度直方图；边缘检测；灰度变换；图像增强；图像分割；-medical image processing edge detection gray-scale transformation image enhancement image segmentation