中文说明：该源码利用三帧差分法实现了运动目标的检测，比传统的帧差法效果要好，阈值可根据自己使用的视频自行调节。本压缩包没有相应的视频，需要自己载入，并重新设定位置。
English Description：
The source by using frame difference method for moving target detection, better than a traditional frame-difference method, threshold can be adjusted according to their use of video on their own. This package does not have a corresponding video, you need to load themselves into, and reconfigure the location.