PDFsharp - moved to http://forum.pdfsharp.net/

PDF_User · Joined: 29 Jul 2008 Posts: 1

How can I check with PDFSharp if a page contains images and text in color or only black/white objects?

alin_edric · Joined: 06 Oct 2008 Posts: 3

also very interested in this. if anyone has an idea, please post

regards,

alin.

PeterGillespie · Joined: 14 Oct 2008 Posts: 8 Location: England

The only way I have ever heard of being able to accomplish this is to turn the PDF file into an image (e.g. bitmap etc.., you can use Ghostscript to do this) then analyse each pixel for it colour ( you can do this using System.Drawing).

If there is an easier way then I would also be very interested to hear it, as the above method is a rather large chore. I know that PDFsharp was originally based on GDI+ so this may indeed be possible (although I have not noticed it).