Emgu.CV.Capture.QuerySmallFrame C# (CSharp) Метод

      public virtual Image<Bgr, Byte> QuerySmallFrame()
      {
         using (Image<Bgr, Byte> frame = QueryFrame())
            return frame == null ? null : frame.PyrDown();
      }
      #endregion

        public void TestBlobTracking()
        {
            Capture capture = new Capture();

             ImageViewer viewer = new ImageViewer();

             BlobTrackerAutoParam<Gray> param = new BlobTrackerAutoParam<Gray>();
             //param.BlobDetector = new BlobDetector(Emgu.CV.CvEnum.BLOB_DETECTOR_TYPE.CC);
             param.FGDetector = new FGDetector<Gray>(Emgu.CV.CvEnum.FORGROUND_DETECTOR_TYPE.FGD);
             //param.BlobTracker = new BlobTracker(Emgu.CV.CvEnum.BLOBTRACKER_TYPE.CCMSPF);
             param.FGTrainFrames = 10;
             BlobTrackerAuto<Gray> tracker = new BlobTrackerAuto<Gray>(param);

             MCvFont font = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_SIMPLEX, 1.0, 1.0);

             Application.Idle += new EventHandler(delegate(object sender, EventArgs e)
             {
            tracker.Process(capture.QuerySmallFrame().PyrUp().Convert<Gray, Byte>());

            Image<Gray, Byte> img = tracker.ForgroundMask;
            //viewer.Image = tracker.GetForgroundMask();
            foreach (MCvBlob blob in tracker)
            {
               img.Draw(Rectangle.Round(blob), new Gray(255.0), 2);
               img.Draw(blob.ID.ToString(), ref font, Point.Round(blob.Center), new Gray(255.0));
            }
            viewer.Image = img;
             });
             viewer.ShowDialog();
        }