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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4210) Unable to extract the text from a PDF ("No Unicode mapping.." warnings)
Date Tue, 08 May 2018 11:38:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16467264#comment-16467264
] 

Tilman Hausherr commented on PDFBOX-4210:
-----------------------------------------

copy & paste in Adobe Reader brings text… same for PDF.js and Chrome, but not Edge.
There is no ToUnicode stream. There is a encoding cmap but that is different... the Unicode
thing would have been in "beginbfchar" or "beginbfrange" and there's no such thing. So Adobe,
PDF.js and Chrome have some fallback logic and I don't know how / why.

> Unable to extract the text from a PDF ("No Unicode mapping.." warnings)
> -----------------------------------------------------------------------
>
>                 Key: PDFBOX-4210
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4210
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Text extraction
>    Affects Versions: 2.0.9
>            Reporter: Aleksandar Putnik
>            Priority: Major
>         Attachments: Testdokument.pdf
>
>
> I'm using Tika (v1.18 , which means pdfbox 2.0.9) to extract the text from PDF.
> I have a document from which the Acrobat Reader (Adobe Acrobat Reader DC) can extract
the text (although not with a 100% precision).
> Besides warnings "WARNING: No Unicode mapping for ... in font ArialMT" pdfbox 2.0.9
doesn't return anything.
> As you can see from the warning, the font in question is ArialMT. It is custom encoding
and the pdf doesn't include toUnicode mapping. Font type is CID TrueType (this info is provided
by "pdffonts")
> "pdftotext" also can't extract anything but only shows an error `Syntax Error: Unknown
character collection 'Adobe-ArialMT'`
> The pdf producer (used by the customer) is VintaSoft PDF .NET Plug-in v5.5.
> I would like to determine whether there is a bug in pdfbox or the pdf producer has to
adjust and improve the "readability" of pdf.
>  
>  



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