Image control combined with BitmapSource can't display some big images

I have developed a full-trust browser hosted application to display images contained in a specific folder. This application uses only classes from System.Windows.Media.Imaging namespace.

I have some big images (A1/A0 scanned at 600 DPI) stored in JPEG or uncompressed TIFF format. For those images the following code behaves very strange.

Stream imageStreamSource = null;
try
{
   FileInfo fi = (FileInfo)lbFiles.SelectedItem;
   BitmapDecoder decoder = null;
   imageStreamSource = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read, FileShare.Read);
   if (fi.Name.EndsWith(".jpg", StringComparison.InvariantCultureIgnoreCase))
     decoder = new JpegBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
   else if (fi.Name.EndsWith(".tif", StringComparison.InvariantCultureIgnoreCase))
     decoder = new TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
   else if (fi.Name.EndsWith(".png", StringComparison.InvariantCultureIgnoreCase))
     decoder = new PngBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
   else if (fi.Name.EndsWith(".bmp", StringComparison.InvariantCultureIgnoreCase))
     decoder = new BmpBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
   ImageSource = decoder.Frames[0];
   ImageSource.Freeze();
}
catch (Exception ex)
{
   MessageBox.Show(ex.Message, "WpfBrowserApplication1", MessageBoxButton.OK, MessageBoxImage.Error);
   return;
}
MessageBox.Show("Image loaded!", "WpfBrowserApplication1", MessageBoxButton.OK, MessageBoxImage.Information);

The image is loaded but the BitmapSource object does not contain any pixel data. I get information about the image resolution, dimensions and color format, but no pixels.

If I try to convert the image to another format, lets say from JPEG to BMP, the file that is generated has only 1 KB. The code used for conversion is as following:

FileInfo fi = (FileInfo)lbFiles.SelectedItem;
string sDestFormat = (string)((ComboBoxItem)cmbDestinationFormat.SelectedValue).Content;
String outputFile = String.Format("{0}\\{1}{2}", fi.Directory.FullName, fi.Name, sDestFormat);
try
{
  BitmapEncoder encoder = null;
  using (FileStream outputStream = new FileStream(outputFile, FileMode.Create))
  {                    
    switch (sDestFormat)
    {
    case ".TIF":
       encoder = new TiffBitmapEncoder();
       ((TiffBitmapEncoder)encoder).Compression = TiffCompressOption.Default;
       break;
    case ".JPG":
       encoder = new JpegBitmapEncoder();
       break;
    case ".PNG":
       encoder = new PngBitmapEncoder();
       break;
    case ".BMP":
       encoder = new BmpBitmapEncoder();
       break;
    }
    encoder.Frames.Add(BitmapFrame.Create(ImageSource));
    encoder.Save(outputStream);
    outputStream.Close();
  }
}
catch (Exception ex)
{
  MessageBox.Show(ex.Message, "WpfBrowserApplication1", MessageBoxButton.OK, MessageBoxImage.Error);
  return;
}
MessageBox.Show(String.Format("Image saved into file '{0}'", outputFile), "WpfBrowserApplication1", MessageBoxButton.OK, MessageBoxImage.Information);

I have uploaded the complete source code for this application here. Just download the archive WpfBrowserApplication1.zip.

I have uploaded some images causing this problem here.

Thank you.

Cosmin Petrenciuc