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谁能告诉我为什么 EMGU 在尝试写出灰度图像时会引发异常?这是我所做的:

gCam.StartAcquisition(); Debug.WriteLine("正在录音...");

        //Bitmap safeImage = new Bitmap(xiImageWidth, xiImageHeight, 
        //System.Drawing.Imaging.PixelFormat.Format8bppIndexed);

        Bitmap safeImage = new Bitmap(xiImageWidth, xiImageHeight,
                                                               System.Drawing.Imaging.PixelFormat.Format16bppGrayScale );

        //Emgu.CV.Image<Gray, Byte> currentFrame;
        Emgu.CV.Image<Gray, UInt16> currentFrame;

        gCam.GetImage(safeImage, XI_CAPTURE_TIMEOUT);

        //currentFrame = new Image<Gray, Byte>(safeImage);
        currentFrame = new Image<Gray, UInt16>(safeImage);
        currentFrame.Save("testImage.bmp");

        startTime = DateTime.Now;

        if (emguVideoWriter.Ptr != IntPtr.Zero)
        {
                emguVideoWriter.WriteFrame(currentFrame);
        }

当我使用 MONO8 和 Image 时,我没有问题,但如果我尝试使用 16 位,我会得到这个异常:

A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
exception caught while recording a frame! ex=System.ArgumentException: Parameter is not valid.
   at System.Drawing.Bitmap.GetPixel(Int32 x, Int32 y)
   at Emgu.CV.Image`2.set_Bitmap(Bitmap value) in C:\Emgu\emgucv-windows-x64 2.4.0.1717\Emgu.CV\Image.cs:line 2866
   at Emgu.CV.Image`2..ctor(Bitmap bmp) in C:\Emgu\emgucv-windows-x64 2.4.0.1717\Emgu.CV\Image.cs:line 213

这让我发疯,因为我不明白为什么我不能写出 16 位图像。我希望 VideoWriter 能让我的生活更轻松,但它只是让事情变得复杂。在这一点上,我几乎想自己写出原始字节!

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1 回答 1

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我想我可能已经找到了答案。Image.cs(EMGU 源代码)的第 2669 行说:

    /*
    //PixelFormat.Format16bppGrayScale is not supported in .NET
    else if (typeof(TColor) == typeof(Gray) && typeof(TDepth) == typeof(UInt16))
    {
       return new Bitmap(
          size.width,
          size.height,
          step,
          PixelFormat.Format16bppGrayScale;
          scan0);
    }*/

不支持!我希望例外说这个!

于 2013-08-13T09:21:27.837 回答