Question

如何清除通过跟踪处理的每个帧？因为现在在我的应用程序中，它会继续增加帧数，消耗大量内存并使我的计算机冻结。

谢谢。

修改

使用3种方法使用camshift算法开始跟踪，更新色调图像，手跟踪器和跟踪手。 1.将图像转换为hsv，获取色调通道颜色，为色调通道做直方图 2.做背投影 3.做camshift - ＆gt; meanshift算法

    public void HandTracker(Image<Bgr, Byte> ImageFrame, Rectangle currentrect)
    {

        hsv = Emgu.CV.CvInvoke.cvCreateImage(new Size(ImageFrame.Width, ImageFrame.Height), IPL_DEPTH.IPL_DEPTH_8U, 3);
        hue = Emgu.CV.CvInvoke.cvCreateImage(new Size(ImageFrame.Width, ImageFrame.Height), IPL_DEPTH.IPL_DEPTH_8U, 1);
        mask = Emgu.CV.CvInvoke.cvCreateImage(new Size(ImageFrame.Width, ImageFrame.Height), IPL_DEPTH.IPL_DEPTH_8U, 1);
        backproject = Emgu.CV.CvInvoke.cvCreateImage(new Size(ImageFrame.Width, ImageFrame.Height), IPL_DEPTH.IPL_DEPTH_8U, 1);
        histogram = new DenseHistogram(30, new RangeF(0, 180));

        previoushand = currentrect;

        UpdateHueImage(ImageFrame);

        //show how many frame detected
        frame = frame + 1;
        label_1.Text = frame.ToString();

        float vmax = 0;
        float vmin = 0;
        float scale = 0;
        x = new IntPtr[1] { hue };

        Emgu.CV.CvInvoke.cvSetImageROI(hue, currentrect);
        Emgu.CV.CvInvoke.cvSetImageROI(mask, currentrect);
        Emgu.CV.CvInvoke.cvCalcHist(x, histogram, false, mask);
        Emgu.CV.CvInvoke.cvGetMinMaxHistValue(histogram, ref vmin, ref vmax, null, null);

        if (vmax != 0)
        {
            scale = 255 / vmax;
        }
        Emgu.CV.CvInvoke.cvConvertScale(histogram.MCvHistogram.bins, histogram.MCvHistogram.bins, scale, 0);
        Emgu.CV.CvInvoke.cvResetImageROI(hue);
        Emgu.CV.CvInvoke.cvResetImageROI(mask);

        //if (ImageFrame != null) ImageFrame.Dispose();
        Debug.WriteLine("hand tracker done!");

    }


    public Rectangle TrackHand(Image<Bgr, Byte> ImageFrame)
    {
        MCvConnectedComp components = new MCvConnectedComp();

        UpdateHueImage(ImageFrame);

        //show how many frame detected
        frame = frame + 1;
        label_2.Text = frame.ToString();

        IntPtr[] x = { hue };
        Emgu.CV.CvInvoke.cvCalcBackProject(x, backproject, histogram);
        Emgu.CV.CvInvoke.cvAnd(backproject, mask, backproject, IntPtr.Zero);
        Emgu.CV.CvInvoke.cvCamShift(backproject, previoushand, new MCvTermCriteria(10, 1), out components, out handcomp);

        previoushand = components.rect;

        ImageFrame.Draw(previoushand, new Bgr(Color.Black), 2);

        Debug.WriteLine("Track hand done!");

        return currenthand;
    }


    private void UpdateHueImage(Image<Bgr, Byte> currentrect)
    {
        Emgu.CV.CvInvoke.cvCvtColor(currentrect, hsv, COLOR_CONVERSION.CV_BGR2HSV);

        int vmin = 65;
        int vmax = 256;
        int smin = 55;
        Emgu.CV.CvInvoke.cvInRangeS(hsv, new MCvScalar(0, smin, Math.Min(vmin, vmax), 0), 
            new MCvScalar(180, 256, Math.Max(vmin, vmax), 0), 
            mask);
        Emgu.CV.CvInvoke.cvSplit(hsv, hue, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);

        Debug.WriteLine("UpdateHueImage done!");

    }

这是我的camshift跟踪代码，我发现它消耗了太多内存，并且在检测到800 ++帧后我的电脑会冻结。我如何删除已处理的缓存ImageFrame？

Answer 1

在处理完图像后调用Dispose()方法。这将释放消耗内存的非托管IplImage结构。

Answer 2

您需要的是： https://github.com/dajuric/accord-net-extensions

检查快速模板匹配样本，粒子过滤器样本（手部跟踪）。适合保存历史的类称为历史。

如何在生命流视频中完成跟踪后清除历史帧？

2 个答案: