背景提取，迭代法(Surendra算法）；即采用帧差的方法，一帧图像减去前一帧图像，即可以对比得到图像中变化（移动）的区域，扣除移动的区域，即得到不动的背景。采用多帧图像迭代的方法，得到更加准确的背景。-Background extraction, iterative method (Surendra algorithm) frame difference method is used, an image by subtracting the previous frame, which can

mean shift跟踪，椭圆大小及方向随物体运动而变化，始终能框住物体，论文和代码均在压缩包里面，亲测没有问题。-mean shift tracking, oval object the size and direction of the movement with the change, will always be able to frame objects, and code papers were compressed inside, pro-test is no problem.