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https://issues.apache.org/jira/browse/PDFBOX-4141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16386362#comment-16386362
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Tilman Hausherr commented on PDFBOX-4141:
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My first thought was to implement a callback feature like we recently did
{{PDFRenderer}} for annotations. But you could also override
{{writeCharacters}}, by checking for whatever characters you'd like to filter.
If you like it, then you call the base class; if you don't, you do nothing.
> Suppress control characters?
> ----------------------------
>
> Key: PDFBOX-4141
> URL: https://issues.apache.org/jira/browse/PDFBOX-4141
> Project: PDFBox
> Issue Type: Improvement
> Components: Parsing
> Reporter: Andreas Meier
> Priority: Minor
> Attachments: Test_with_MW.pdf, Test_with_MW.txt,
> Test_with_MW_AdobeReader_export.txt, Test_with_MW_linux.jpg,
> Test_without_MW.txt
>
>
> At the moment pdfbox extracts all types of characters.
> Therefore control characters that occur will also be extracted.
> Unfortunately some of these control characters might deform text.
> For example 'MESSAGE WAITING' (U+0095) [MW]
> I attached some files and a screenshot how text is printed when MESSAGE
> WAITING is present.
> Should PDFBox handle this type of characters? Maybe suppress them in
> PDFTextStripper?
> I know that PDFBox works correctly in this case, a feature to turn off or
> suppress special characters might produce better output than the default
> Setting unless some control characters are used for any further processing!?
> Feedback appreciated.
> What other programs do:
> a) ignore control characters (Okular PDF Viewer - KDE)
> b) exchange them (Adobe Reader wrote a dot "." in place of MW)
> Regards
> Andreas
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