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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2010/05/21 20:01:32 UTC
[jira] Commented: (PDFBOX-728) Text extracted from a TeX-created
PDF file comes in some form of hex encoding
[ https://issues.apache.org/jira/browse/PDFBOX-728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870078#action_12870078 ]
Andreas Lehmkühler commented on PDFBOX-728:
-------------------------------------------
With version 947097 I've added some more mappings
- ligatures
- the special charcters mentioned by thomas
and I've improved the decoding of the character encoding used by tex/latex:
- the range from 0-9 is mapped to 160-169
- the range from 10-31 is mapped to 173-..
- 127 is mapped to 196
> Text extracted from a TeX-created PDF file comes in some form of hex encoding
> -----------------------------------------------------------------------------
>
> Key: PDFBOX-728
> URL: https://issues.apache.org/jira/browse/PDFBOX-728
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.1.0
> Environment: Mac OS X 10.6.3, using org.apache.pdfbox.ExtractText -encoding UTF-8
> Reporter: Thomas Fischer
> Priority: Minor
> Fix For: 1.2.0
>
> Attachments: wias_preprints_1401.pdf, wias_preprints_1401.txt, wias_preprints_1401_r944875.txt
>
>
> The text in this example is extracted essentially correctly, but presented in a hex-encoded form, probably interspersed with some non encoded characters as in the following example:
> x54x6f x69x6ex63x6fx72x70x6fx72x61x74x65 x74x68x65 x65x6cx61x73x74x69x63 x70x72x6fx70x65x72x74x69x65x73 x6fx66 x74x68x65 x6dx61x74x65x72x69x61x6cx2c x77x65 x6ex65x65x64 x74x6f x69x6ex74x72x6fx64x75x63x65 x74x68x65 x64x65x66x6fx72x2d
> x6dx61x74x69x6fx6e x74x65x6ex73x6fx72
> F(X, t) = ∂x∂X (X, t).
> A Perl command like
> s/x([\da-f]{2})/chr(hex($1))/eg;
> will usually reveal a correct translation, although certain characters may be off, I had to add e.g.
> s/ÿ/ß/g;
>
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