请帮我纠正下面的c＃代码 [英] please help me to correct the below c# code

问题描述

这里我的目标是使用emgucv从文件夹中读取图像并检测其前景，但下面的代码不会显示任何事情给出异常

Here my aim to to use emgucv for reading images from a folder and detect its foreground but the below code will not show any thing give an exception

private void timer1_Tick(object sender, EventArgs e)
      {

          if (File.Exists(Application.StartupPath + "\\frames\\" + i + ".jpg"))
          {

              using (Image<Bgr, Byte> image = new Image<Bgr, byte>(Application.StartupPath + "\\frames\\" + i + ".jpg"))

              using (MemStorage storage = new MemStorage()) //create storage for motion components
              {
                  if (_forgroundDetector == null)
                  {
                      //_forgroundDetector = new BGCodeBookModel<Bgr>();
                      _forgroundDetector = new FGDetector<Bgr>(Emgu.CV.CvEnum.FORGROUND_DETECTOR_TYPE.FGD);
                      //_forgroundDetector = new BGStatModel<Bgr>(image, Emgu.CV.CvEnum.BG_STAT_TYPE.FGD_STAT_MODEL);
                  }

                  _forgroundDetector.Update(image);

                 imageBox1.Image = image;

                  //update the motion history
                  _motionHistory.Update(_forgroundDetector.ForegroundMask);

                  imageBox2.Image = _forgroundDetector.ForegroundMask;

              }

              }

          i++;

      }

查看此消息的结尾有关调用

实时（JIT）调试而非此对话框的详细信息。



******* *******异常文本**************

Emgu.CV.Util.CvException：OpenCV：无法分配589824000字节
$ C $ b at Emgu.CV.CvInvoke.CvErrorHandler（Int32 status，String funcName，String errMsg，String fileName，Int32 line，IntPtr userData）in C：\ Emgu\emgucv-windows-universal-gpu 2.4.9.1847 \\ \\ emgu.CV \PInvoke \CvInvokeCore.cs：第132行

在Emgu.CV.CvInvoke.CvFGDetectorProcess（IntPtr探测器，IntPtr图像）

在Emgu.CV .VideoSurveillance.FGDetector`1.Update（图像`2图像）在C：\ Emgu \emgucv-windows-universal-gpu 2.4.9.1847 \Emgu.CV \ VideoSurveillance\FGDetector.cs：第65行

at testlucasimagebox.Form1.timer1_Tick（Object sender，EventArgs e）

在System.Windows.Forms。在System.Windows.Forms.Timer.TimerNativeWindow.WndProc上的Timer.OnTick（EventArgs e）

（消息& m）

在System.Windows.Forms.NativeWindow.Callback（IntPtr hWnd，Int32 msg，IntPtr wparam，IntPtr lparam）





但是当我使用网络摄像头的图像时，下面的代码工作正常

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
Emgu.CV.Util.CvException: OpenCV: Failed to allocate 589824000 bytes
at Emgu.CV.CvInvoke.CvErrorHandler(Int32 status, String funcName, String errMsg, String fileName, Int32 line, IntPtr userData) in C:\Emgu\emgucv-windows-universal-gpu 2.4.9.1847\Emgu.CV\PInvoke\CvInvokeCore.cs:line 132
at Emgu.CV.CvInvoke.CvFGDetectorProcess(IntPtr detector, IntPtr image)
at Emgu.CV.VideoSurveillance.FGDetector`1.Update(Image`2 image) in C:\Emgu\emgucv-windows-universal-gpu 2.4.9.1847\Emgu.CV\VideoSurveillance\FGDetector.cs:line 65
at testlucasimagebox.Form1.timer1_Tick(Object sender, EventArgs e)
at System.Windows.Forms.Timer.OnTick(EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


but when i use images from a webcam the below code works fine

using (Image<Bgr, Byte> image = _capture.RetrieveBgrFrame())
          using (MemStorage storage = new MemStorage()) //create storage for motion components
          {
              if (_forgroundDetector == null)
              {
                  //_forgroundDetector = new BGCodeBookModel<Bgr>();
                  _forgroundDetector = new FGDetector<Bgr>(Emgu.CV.CvEnum.FORGROUND_DETECTOR_TYPE.FGD);
                  //_forgroundDetector = new BGStatModel<Bgr>(image, Emgu.CV.CvEnum.BG_STAT_TYPE.FGD_STAT_MODEL);
              }

              _forgroundDetector.Update(image);

              capturedImageBox.Image = image;

              //update the motion history
              _motionHistory.Update(_forgroundDetector.ForegroundMask);

              forgroundImageBox.Image = _forgroundDetector.ForegroundMask;

这里是我使用网络摄像头时的输出图像/>
https://www.dropbox.com/s/k04b0ng8ez0zmvr/emgucv.jpg [ ^ ]

推荐答案

错误正是它所说的，您正在尝试加载562-ish MB的映像，框架无法加载。帧文件夹中图像的大小是多少？







第二次看，看起来你正在每个刻度线上创建一个新的前景探测器，你不应该这样做。作为类的成员创建一次，并使用每个帧更新它。它可能持有对你创建的每一个的引用，并且在它达到某个点之后，它不能再分配更多的内存。

The error is exactly what it says, you are trying to load an image that is 562-ish MB, which the framework can't load. What is the size of your images in the frames folder?



On second look, looks like you are creating a new Foreground Detector on each tick, which you should not do. Create it once as a member of your class and update it with each frame. Its probably holding references to each one you create, and after it hits a certain point, it can't allocate any more memory.

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