Article View: comp.os.linux.misc
Article #1301Re: Extract equations from a PDF file
From: Julian V. Noble
Date: Thu, 23 Sep 2004 20:11
Date: Thu, 23 Sep 2004 20:11
33 lines
2558 bytes
2558 bytes
Fajar Suryawan wrote:
>
> <horacio@NOSPAMum.es> wrote in message news:<cis9ma$svj$1@unida.um.es>...
> > Hello everybody,
> >
> > could somebody tell me if it is possible to extract equations from a paper
> > in a PDF file ?
>
> Simple answer, you don't.
> PDF is printer language. There's no information on the mathematics'
> original LaTeX-code.
> Reverse engineering is nice, but not easy.
>
> F
This is basically correct. It is straightforward to turn pig into
sausage, but no one has found a simple way to reverse this. So
you can't retrieve LaTeX source for equations from an image without
solving some fairly deep problems in CS.
Why not simply retype them using MathType, which is WYSIWYG and can
output LaTeX in various forms?
--
Julian V. Noble
Professor Emeritus of Physics
jvn@lessspamformother.virginia.edu
^^^^^^^^^^^^^^^^^^
http://galileo.phys.virginia.edu/~jvn/
"For there was never yet philosopher that could endure the toothache
patiently." -- Wm. Shakespeare, Much Ado about Nothing. Act v. Sc. 1.
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X-Google-Thread: 1103af,b48422c0905393e6 X-Google-Thread: 1102f1,b48422c0905393e6 X-Google-Thread: f9e16,b48422c0905393e6 X-Google-Thread: f877f,b48422c0905393e6 X-Google-Thread: f6099,b48422c0905393e6 X-Google-Attributes: gid1103af,gid1102f1,gidf9e16,gidf877f,gidf6099,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!proxad.net!news.tele.dk!news.tele.dk!small.news.tele.dk!lnewsoutpeer01.lnd.ops.eu.uu.net!lnewsinpeer01.lnd.ops.eu.uu.net!bnewsoutpeer01.bru.ops.eu.uu.net!bnewsinpeer01.bru.ops.eu.uu.net!emea.uu.net!ash.uu.net!hearst.acc.Virginia.EDU!news.Virginia.EDU!not-for-mail From: "Julian V. Noble" <jvn@virginia.edu> Newsgroups: comp.os.linux.misc,comp.os.ms-windows.misc,comp.text.tex,es.comp.lenguajes.tex,es.comp.os.linux.misc Subject: Re: Extract equations from a PDF file Date: Thu, 23 Sep 2004 16:11:54 -0400 Organization: University of Virginia Lines: 33 Message-ID: <41532E0A.546587EE@virginia.edu> References: <cis9ma$svj$1@unida.um.es> <e86402e1.0409221829.499f76b0@posting.google.com> NNTP-Posting-Host: d-128-102-189.bootp.virginia.edu Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: murdoch.acc.Virginia.EDU 1095970449 14943 128.143.102.189 (23 Sep 2004 20:14:09 GMT) X-Complaints-To: abuse@Virginia.EDU NNTP-Posting-Date: Thu, 23 Sep 2004 20:14:09 +0000 (UTC) X-Mailer: Mozilla 4.7 [en]C-CCK-MCD EBM-Compaq1 (Win95; U) X-Accept-Language: en