中文说明：1. 掌握均值滤波和中值滤波的原理及实现；2. 掌握锐化模板prewitt，sobel和laplacian的使用方法；3. 了解形态学的基本理论和方法；4. 掌握对图像进行膨胀/腐蚀的方法；掌握开闭运算；
English Description：
1. principle and realization of median filter and median filter;2. sharpen the template Prewitt,Sobel, and Laplacian method;3. to understand the basic theory and method of morphology;4. master the method of dilation/erosion of the image;Master opening-closing operation;