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Posted to users@pdfbox.apache.org by Paul Bergstrom <pa...@yahoo.com.INVALID> on 2016/07/06 11:22:57 UTC
PDF to PDF/A conversion
Hi!
I'm totally new to Apache PDFBox to please bear any stupid question:-)
In my work I do some digital archiving where I usually OCR scanned PDF-images with Tesseract and then do the conversion from PDF to PDF/A-1b with Ghostscript.
However, there has recently been a change in the OCR specifications - don't really know when and exactly how - but the consequences are that Ghostscript now is mangling and altering the OCR so it can't be used. As what I understand it has something to do with the ToUnicode CMap processing.
However I tried some other software to do the conversion and the problem does not occur there. That's why I also would like to try to do the conversion with PDFBox to see what happens.
The problem is I have absolutely no idea how to do this. I'm not really in to java-based software. Can it be done nad how is it done? Preferably from the Linux commandline.
I saw this https://pdfbox.apache.org/1.8/cookbook/pdfacreation.html but I can't make any sense out of it.
Is it possible something like this:
java -jar pdfbox-app-x.y.z.jar Convert [OPTIONS] <inputfile> [outputfile] (where options might be compability level)?
Many thanks for your effort!
Best regards
Paul Bergström
Sweden
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Re: PDF to PDF/A conversion
Posted by Tilman Hausherr <TH...@t-online.de>.
Am 06.07.2016 um 13:22 schrieb Paul Bergstrom:
> Hi!
>
> I'm totally new to Apache PDFBox to please bear any stupid question:-)
>
> In my work I do some digital archiving where I usually OCR scanned PDF-images with Tesseract and then do the conversion from PDF to PDF/A-1b with Ghostscript.
>
> However, there has recently been a change in the OCR specifications - don't really know when and exactly how - but the consequences are that Ghostscript now is mangling and altering the OCR so it can't be used. As what I understand it has something to do with the ToUnicode CMap processing.
>
> However I tried some other software to do the conversion and the problem does not occur there. That's why I also would like to try to do the conversion with PDFBox to see what happens.
>
> The problem is I have absolutely no idea how to do this. I'm not really in to java-based software. Can it be done nad how is it done? Preferably from the Linux commandline.
>
> I saw this https://pdfbox.apache.org/1.8/cookbook/pdfacreation.html but I can't make any sense out of it.
>
> Is it possible something like this:
>
> java -jar pdfbox-app-x.y.z.jar Convert [OPTIONS] <inputfile> [outputfile] (where options might be compability level)?
We don't have a tool that converts PDF to PDF/A-1b (there are commercial
tools that do that, e.g. from Callas or PDF-Tools). It might be possible
to implement this if the flaws are known in advance. Usually the meta
data and the output intent are missing, but there might be much more.
Tilman
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Re: PDF to PDF/A conversion
Posted by Mick Davis <tg...@gmail.com>.
Hi Paul,
I just finished doing exactly that for the same reason (archiving
documents). I wrote a Java program that can be called from the command
line. It would probably need to be tweaked to suit your exact needs but I
would be happy to share it and provide some help with customizing it. I'm
away from my desk right now but I will follow up with you later today.
Mick Davis
On Jul 6, 2016 8:30 AM, "Paul Bergstrom"
<pa...@yahoo.com.invalid> wrote:
> Hi!
>
> I'm totally new to Apache PDFBox to please bear any stupid question:-)
>
> In my work I do some digital archiving where I usually OCR scanned
> PDF-images with Tesseract and then do the conversion from PDF to PDF/A-1b
> with Ghostscript.
>
> However, there has recently been a change in the OCR specifications -
> don't really know when and exactly how - but the consequences are that
> Ghostscript now is mangling and altering the OCR so it can't be used. As
> what I understand it has something to do with the ToUnicode CMap processing.
>
> However I tried some other software to do the conversion and the problem
> does not occur there. That's why I also would like to try to do the
> conversion with PDFBox to see what happens.
>
> The problem is I have absolutely no idea how to do this. I'm not really in
> to java-based software. Can it be done nad how is it done? Preferably from
> the Linux commandline.
>
> I saw this https://pdfbox.apache.org/1.8/cookbook/pdfacreation.html but I
> can't make any sense out of it.
>
> Is it possible something like this:
>
> java -jar pdfbox-app-x.y.z.jar Convert [OPTIONS] <inputfile> [outputfile]
> (where options might be compability level)?
>
> Many thanks for your effort!
>
> Best regards
>
> Paul Bergström
> Sweden
>
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> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
> For additional commands, e-mail: users-help@pdfbox.apache.org
>
>