最简单的平滑滤波是将原图中一个像素的灰度值和它周围邻近8个像素的灰度值相加，然后将求得的平均值（除以9）作为新图中该像素的灰度值。它采用模板计算的思想，模板操作实现了一种邻域运算，即某个像素点的结果不仅与本像素灰度有关，而且与其邻域点的像素值有关。-Smoothing filter is the most simple gray gray of a pixel in the original image and its neighboring 8 pixel value, average value and then the obtained (divided by 9) as the pixel gray value in the new. It uses the template computation theory, template operation to achieve a neighborhood operation, which results in a pixel is not only related to the pixel, and the pixel and its neighborhood points related to the value of.