帧差法进行视频监控，第一帧捕捉背景，第二帧捕捉目标，最后进行区域监控。-Frame difference method for video surveillance, first frame capture background, second frame capture target, the last area monitoring.

帧差法进行视频监控，第一帧捕捉背景，第二帧捕捉目标，最后进行区域监控。-Frame difference method for video surveillance, first frame capture background, second frame capture target, the last area monitoring.