利用二帧帧差法来实现视频图像中前景与背景的分离-Two frame difference method to achieve the separation of the foreground and background in the video images

基于Opencv1.0的帧差法目标识别，效果不是很好，但具有一定的实时性。-Opencv1.0 frame difference method based object recognition, the effect is not very good, but has some real-time.

基于帧差法的运动目标检测的的程序，很好用-Frame differential method based on moving target detection procedures, very useful

使用帧差法对视频中的目标进行跟踪，并画出矩形框与坐标。依靠opencv库，使用时需修改视频路径。(he frame difference method is used to track the object in the video, and the rectangle frame and coordinate are drawn. Depending on the opencv library, you need to modify the video path when using it.)

关键帧提取的帧间差分法实现，亲测可运行。(Key frame extraction)