中文说明：数字图像处理是大部分跟计算机相关专业中的常设课程，图像平滑技术是其重要处理技术之一，也是课后必做实验之一，主要用处对噪声的处理，是图像优化还原的一个重要手段。
English Description：
Digital image processing is a permanent course in most computer related majors. Image smoothing technology is one of its important processing technologies and one of the necessary experiments after class. It is mainly used for noise processing and is an important means of image optimization and restoration.