Thanks chaps, I think this is helpful.
I decided to keep this job running on Odesk, instead of diving in myself:
https://www.odesk.com/jobs/Finish-code-identify-redactions-PDF-document-using-iTextSharp_~~95d549b336de0217
Some day, some day, I will spend an afternoon with iText in Action to
understand PDF :)
On Tue, Sep 4, 2012 at 8:13 PM, mkl <[email protected]> wrote:
> Nick,
>
> 1T3XT BVBA wrote
> >
> >>
> http://stackoverflow.com/questions/12255508/how-to-extract-text-marked-for-redaction-from-a-pdf-using-itextsharp
> >
> > When iText extracts text from a PDF, it produces TextRenderInfo objects.
> > These objects contain the PDF Strings the way they are present in the PDF
> > syntax of a content stream. When you use a RegionTextRenderFilter, you
> get
> > all the snippets of text that intersect with the region of your
> > choice. The snippets aren't 'clipped' to match that region. That's
> > something you'd need to do in the postprocessing of the snippets by using
> > the metrics provided by the TextRenderInfo objects.
>
> Being curious I had a look at your document; Bruno, of course, was right.
> For example the first mark on page 2 of your markedForRedaction.pdf test
> file shows the problem quite clearly. The line
>
> commodo ultrices imperdiet. Vestibulum ut justo vel sapien venenatis
> tincidunt. Phasellus eget
>
> is marked for redaction from "Vestibulum" until the end. Looking at the
> page
> content you find this line being described in PDF syntax like this:
>
> [(c)-3(o)6(m)9(mo)4(do)5( ult)12(r)-3(i)3(c)-3(es)4(
> i)16(mp)-5(e)12(r)7(diet. V)10(es)4(tib)10(ulu)10(m u)-3(t
> j)14(ust)11(o)-4(
> v)3(el)15( s)5(ap)-4(i)3(en )11(ven)11(ena)7(tis)5(
> tin)12(c)-3(i)3(du)7(n)9(t. P)4(ha)-4(s)4(el)4(l)15(us ege)13(t )] TJ
>
> So the mark begins inside of "diet. V" and, therefore, your code returns
> the
> line prefixed by "diet. ".
>
> Regards, Michael
>
>
>
> --
> View this message in context:
> http://itext-general.2136553.n4.nabble.com/How-to-extract-text-marked-for-redaction-tp4656134p4656139.html
> Sent from the iText - General mailing list archive at Nabble.com.
>
>
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
iText-questions mailing list
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
