Question

有人能告诉我为什么EMGU在尝试写出灰度图像时会抛出异常吗？这是我的工作：

gCam.StartAcquisition（）; 的Debug.WriteLine（ “记录...”）;

        //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，但如果我尝试去16位，我会得到这个例外：

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能让我的生活变得更轻松，但这只会让事情复杂化。我几乎觉得自己刚刚写出了原始字节！

Answer 1

我想我可能找到了答案。 Image.cs的第2669行（EMGU源代码）说明了这一点：

    /*
    //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！

尝试将灰度图像写入VideoWriter时，EMGU崩溃

1 个答案: