Hi
I got it working, I think. At least I guess a PDF with no text and images
retained, that I can open in Adobe Reader. Will test further and report back if
it did not after all. Thanks for the pointers so far!
-----Oprindelig meddelelse-----
Fra: Jacob Pedersen <jacob.peder...@formpipe.com>
Sendt: 27. november 2019 09:06
Til: zyx <z...@gmx.us>; podofo-users@lists.sourceforge.net
Emne: Re: [Podofo-users] Example of text removal or image extraction
Hi
I think this is the way to go, rather than copying images over.
Removing text could be done by either;
1. Replace chars in text draw commands with spaces. I guess it would be the
simplest and fastest approach if possible.
2. Remove text draw commands (basically anything between and including BT and
ET). Fonts can be left, since PDF will just be converted into TIFF, so it must
just be readable. Size does not matter since it will exist for a fraction of a
second in memory.
I have not found any examples of how to replace or edit the contents stream. I
can iterate through it using the tokenizer, but where to go from there?
Thanks for more pointers 😊
-----Oprindelig meddelelse-----
Fra: zyx <z...@gmx.us>
Sendt: 26. november 2019 07:51
Til: podofo-users@lists.sourceforge.net
Emne: Re: [Podofo-users] Example of text removal or image extraction
On Mon, 2019-11-25 at 18:04 +0000, Jacob Pedersen wrote:
> Basically I just need to make an identical PDF without the text.
Hi,
it would be much harder, but maybe you can change the podofotxtextract tool and
instead of extracting only the text (see the TextExtractor::ExtractText there),
remove the text from the corresponding content streams, preserving all but the
text-related things. You might be able to remove also any font objects, because
they can mean significant part of the PDF file. Removing such objects, with all
its references in the document, can be tricky. The same editing of the content
streams.
Bye,
zyx
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