-none- 2007-09-05 - By Leonard Rosenthol
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On Sep 5, 2007, at 10:19 PM, Chad Loder wrote:
> Is there any way using iText to develop a heuristic which detects PDFs
> which have been improperly redacted in the below fashion? Ever if it
> is not 100% reliable.
>
Yes...
HOWEVER, it will require you to do a LOT of work - since iText today
only gives you the lower level of functionality. iText can parse
the content stream of a page (or XObject) for you - but that's it.
You then need to take the results from that parse, build up a
"display list", compute the bounds of each object in that list and
then compare bounds.
Give yourself at least a month or two - including a thorough reading
of the PDF Reference.
OR start with a library such as PdfBox or Multivalent that already
have some/all of this framework in place.
Leonard
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