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https://issues.apache.org/jira/browse/PDFBOX-4737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014860#comment-17014860
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Tilman Hausherr commented on PDFBOX-4737:
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Not done anything because 1) no time, 2) not my core skills, 3) I don't see
this as a PDFBox problem. This is something on a higher level, i.e. deciding
whether an existing text is garbage or not. As explained, even if we'd provide
a "strict" extraction (i.e. ignore unicode mappings that are not 100% following
the PDF specification) we could still have gibberish.
> Text extraction is gibberish
> ----------------------------
>
> Key: PDFBOX-4737
> URL: https://issues.apache.org/jira/browse/PDFBOX-4737
> Project: PDFBox
> Issue Type: Improvement
> Affects Versions: 2.0.18
> Reporter: Jorge Spinsanti
> Priority: Major
> Attachments: noUnicodeMapping.pdf, obfuscateTest_Duplicate_2_3.pdf
>
>
> As it was discussed on https://issues.apache.org/jira/browse/PDFBOX-4549
> there are many PDFs where the text extraction is gibberish.
> Perhaps you can add two modes (strict/lax) to text extraction to avoid
> gibberish if not useful. Add a file to analyze the problem.
> [^noUnicodeMapping.pdf]
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