Moving object detection by frame difference method是当前视频图像领域进行动目标捕捉的最简单有效的方法，核心思想是从视频中提取每一帧，并与下一帧做相关检测，通过相关系数提取运动的目标。-Moving target detection and frame difference method is the current video image field is moving the most simple and effective method to capture the target, the core idea is to extract each frame　the video, and correlation detection and the next frame, extract the moving target by correlation coefficient.