如何使用C＃显示24bpp原始图像 [英] How to display 24bpp raw images using C#

问题描述

大家好，

我使用原始图像显示器有16位和8位选项显示原始图像为灰色8/16但我想在24bpp显示图像rgb /bgr.code我使用附在下面。可以任何人帮我解决这个问题



我尝试过：

Hello guys ,
I am using raw image Displayer which has 16bit and 8bit option to display raw images as gray 8/16 but i wanted to display image in 24bpp rgb /bgr.code which i use is attached below .can any one help me to sort out of yhis problem

What I have tried:

private void DisplayImage16(string fileName)
{    
    // Open a binary reader to read in the pixel data. 
    // We cannot use the usual image loading mechanisms since this is raw 
    // image data.
    try
    {

        BinaryReader br = new BinaryReader(File.Open(fileName, FileMode.Open));
        ushort pixShort;
        int i;
        long iTotalSize = br.BaseStream.Length;
        int iNumberOfPixels = (int)(iTotalSize /2);

        // Get the dimensions of the image from the user
        ID = new ImageDimensions(iNumberOfPixels);
        if (ID.ShowDialog() == true)
        {
            width = Convert.ToInt32(ID.tbWidth.Text);
            height = Convert.ToInt32(ID.tbHeight.Text);
            canvas.Width = width;
            canvas.Height = height;
            img.Width = width;
            img.Height = height;
            pix16 = new ushort[iNumberOfPixels];

            for (i = 0; i < iNumberOfPixels; ++i)
            {
                pixShort = (ushort)(br.ReadUInt16());
                //pix16[i] = pixShort;
            }
            br.Close();

            int bitsPerPixel = 24;
            stride = (width * bitsPerPixel *3);

            // Single step creation of the image
            bmps = BitmapSource.Create(width, height, 96, 96, PixelFormats.Gray16, null,
                pix16, stride);
            img.Source = bmps;
            bnSaveJPG.IsEnabled = true;
            bnSavePNG.IsEnabled = true;
        }
      //  else
        {
            br.Close();
        }

    }
    catch (Exception e)
    {
       // continue;
       // MessageBox.Show(e.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);

    }
}     


private void DisplayImage08(string fileName)
{
    // Open a binary reader to read in the pixel data. 
    // We cannot use the usual image loading mechanisms since this is raw 
    // image data.         
    try
    {
        BinaryReader br = new BinaryReader(File.Open(fileName, FileMode.Open));
        byte pixByte;
        int i;
        int iTotalSize = (int)br.BaseStream.Length;

        // Get the dimensions of the image from the user
        ID = new ImageDimensions(iTotalSize);
        if (ID.ShowDialog() == true)
        {
            width = Convert.ToInt32(ID.tbWidth.Text);
            height = Convert.ToInt32(ID.tbHeight.Text);
            canvas.Width = width;
            canvas.Height = height;
            img.Width = width;
            img.Height = height;
            pix08 = new byte[iTotalSize];

            for (i = 0; i < iTotalSize; ++i)
            {
                pixByte = (byte)(br.ReadByte());
               pix08[i] = pixByte;
            }
            br.Close();

            int bitsPerPixel = 24;
            stride = (width * bitsPerPixel +7)/24;

            // Single step creation of the image
            bmps = BitmapSource.Create(width, height, 96, 96, PixelFormats.Gray8, null,
                pix08, stride);
            img.Source = bmps;
            bnSaveJPG.IsEnabled = true;
            bnSavePNG.IsEnabled = true;
        }
      //  else
        {
            //br.Close();
        }
    }
    catch (Exception e)
    {
        //MessageBox.Show(e.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
    }
}

private void bnSavePNG_Click(object sender, RoutedEventArgs e)
{
    SaveFileDialog dlg = new SaveFileDialog();
    dlg.Filter = "PNG Images (.png)|*.png";

    // Show save file dialog box
    Nullable<bool> result = dlg.ShowDialog();
    string targetPath = "";

    // Process save file dialog box results
    if (result == true)
    {
        // Save document
        targetPath = dlg.FileName;
        FileStream fs = new FileStream(targetPath, FileMode.Create);
        BitmapEncoder encoder = new PngBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(bmps));
        encoder.Save(fs);
        fs.Close();
    }
}

推荐答案

您可以像这样填写BitmapSource的颜色数据：

You can fill in the colour data for a BitmapSource like this:

PixelFormat pf = PixelFormats.Bgr24;
int rawStride = (width * pf.BitsPerPixel + 7) / 8;
byte[] rawImage = new byte[rawStride * height];
int rgbIndex = 0;
for (int lineIndex = 0; lineIndex < height; lineIndex++)
{
    int lineStart = lineIndex * rawStride;
    for (int pixelIndex = 0; pixelIndex < width; pixelIndex++)
    {
        rawImage[lineStart++] = (byte)(br.ReadByte()); // Red
        rawImage[lineStart++] = (byte)(br.ReadByte()); // Green
        rawImage[lineStart++] = (byte)(br.ReadByte()); // Blue
    }
}
image = BitmapSource.Create(width, height, 96, 96, pf, null, rawImage, rawStride);

不知道原始数据的格式我不能告诉你正确的读取文件的方法。上面的代码假设数据存储在RGBRGB..etc中，没有任何间隙。

Not knowing what format the raw data is in I can not advise you on the correct way to read the file. The code above assumes the data is stored RGBRGB..etc with no gaps anywhere.

这篇关于如何使用C＃显示24bpp原始图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！