实现AVI视频的读取和背景检测，实现运动物体的实时跟踪,get frame from avi

使用opencv编写的提取avi视频的水平和垂直时空切片的程序。可以用于视频镜头切换检测，和运动目标检测。-Opencv extract prepared using avi video horizontal and vertical sections of the process of time and space. Video camera can be used for change detection and moving target detection.