读入一个avi视频，将视频转换成图片序列，然后对其每帧图像进行空间滤波（中值滤波，均值滤波）在对滤波后的图像直方图均衡化，生成新的图像增强后的AVI视频-Reads a avi video, convert video into a sequence of pictures, then spatial filtering (median filter, mean filter) in its every fr a me of the image histogram equalization fi