PDFsharp & MigraDoc Foundation

I have a fairly simple task: I need to read a PDF file and write out its image contents while ignoring its text contents. So essentially I need to do the complement of "save as text".

Ideally, I would prefer to avoid any sort of re-compression of the image contents but if it's not possible, it's ok too.

Are the examples of how to do it?

Thanks!

You can use the Export Images sample to get started, but several special cases are missing there:
http://www.pdfsharp.net/wiki/ExportImages-sample.ashx

Sometimes two filters apply to one image and code for non-JPEG images is completely missing.

_________________
Regards
Thomas Hoevel
PDFsharp Team

Yes, I have looked at that example before. The problem is that it only saves "pictures", not the pictorial representation of the text. Is there another example that would show how to loop over all "text" items in a PDF document? I might be able to use that example for the following: Create a Document object from the original PDF and then loop over all the text pieces and either remove the textual contents of these pieces or replace them with something bogus. I would then export the modified Document into a different PDF file. Do you think this might work?

Here is code that extracts text from PDF:
viewtopic.php?p=4010#p4010

Extracting text is a difficult task - also discussed here:
http://stackoverflow.com/a/9161732/162529

_________________
Regards
Thomas Hoevel
PDFsharp Team

Thomas, do you have a link to a document that describes the latest version of the PDF format in detail? Or some older version? Thx

Try Adobe:
http://www.adobe.com/devnet/pdf/pdf_reference.html

_________________
Regards
Thomas Hoevel
PDFsharp Team