经过优化的二维平均滤波，程序可以根据滤波窗口的大小自适应的选择行优化或者列优化，同时函数还包含了三种边界处理功能：预设值、近邻和镜像。假设滤波窗口的长边为N，算法的优化效率大约为N/2。-After optimization of 2D averaging filter, the program can be optimized according to the size of the adaptive filter window select the row or column to optimize function also contains three kinds of boundary treatment: default, neighbors and the mirror. The long side of the hypothetical filter window is N, and optimize the efficiency of the algorithm is approximately N/2.