void CrelaxMyFriendDlg::OnBnClickedOk()
{
	hdc = this->GetDC()->GetSafeHdc();
	// TODO: 在此添加控件通知处理程序代码
	string addrImg = "c:/Users/actorsun/Pictures/";
	string addrVideo = "c:/Users/actorsun/Videos/";
	string addr = addrVideo + "1.mp4";
	VideoCapture vc(addr);
	if (!(vc.isOpened()))
	{
		Sleep(1);
	}
	Mat relax, positive, gray;
	Mat first,current,obj;
	vc >> first;
	cvtColor(first, first, COLOR_BGR2GRAY);
	GaussianBlur(first, first, Size(0, 0), 1);
	while (1)
	{
		vc >> current;
		if (current.empty())
		{
			break;
		}
		cvtColor(current, current, COLOR_BGR2GRAY);
		GaussianBlur(current, current, Size(0, 0), 1);
		absdiff(first, current, obj);
		imshow("obj", obj);
		waitKey(1000 / vc.get(CAP_PROP_FPS));

	}



	//在运动物体上面画个矩形框，像我的监控一样
	waitKey(0);
}

注意看右上角那个白色的东西，那是一个人从右上角路过，然后被检测到了，注意了这个白色的区域会一直跟随人而移动