private static void ConvertPdfToTif(string fileName)
{
Func <int, string> getSaveFileName = pg => Path.GetDirectoryName(fileName)
+ Path.DirectorySeparatorChar
+ Path.GetFileNameWithoutExtension(fileName)
+ "_pg"
+ pg.ToString()
+ ".tif";
try
{
using (var codecs = new RasterCodecs())
{
var info = codecs.GetInformation(fileName, true);
for (var pageNumber = 1; pageNumber <= info.TotalPages; pageNumber++)
{
// Make sure the resulting img has the original resolution
var pdfInfo = codecs.GetRasterPdfInfo(fileName, pageNumber);
codecs.Options.RasterizeDocument.Load.XResolution = pdfInfo.XResolution;
codecs.Options.RasterizeDocument.Load.YResolution = pdfInfo.YResolution;
// Save the file using a format appropriate for the bits per pixel
var bpp = pdfInfo.BitsPerPixel;
var saveFormat = RasterImageFormat.Tif;
if (bpp == 1)
{
saveFormat = RasterImageFormat.CcittGroup4;
}
else if (bpp > 1 && bpp < 9)
{
saveFormat = RasterImageFormat.TifLzw;
}
else if (bpp == 24)
{
saveFormat = RasterImageFormat.TifJpeg;
}
using (var page = codecs.Load(fileName, pageNumber))
codecs.Save(page, getSaveFileName(pageNumber), saveFormat, 0);
}
}
Console.WriteLine("Done");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
finally
{
Console.ReadLine();
}
}