[jira] [Updated] (TIKA-3270) Render non-text in PDFs for OCR

["Tim Allison (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TIKA-3270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Allison updated TIKA-3270:
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    Attachment: test-no-text.png
                test.png

> Render non-text in PDFs for OCR
> -------------------------------
>
>                 Key: TIKA-3270
>                 URL: https://issues.apache.org/jira/browse/TIKA-3270
>             Project: Tika
>          Issue Type: Improvement
>            Reporter: Tim Allison
>            Priority: Major
>         Attachments: test-no-text.png, test.png, tiger.pdf
>
>
> When we render a PDF page for OCR, we are relying on PDFBox to render all of the contents of the page, including text that may be available via regular extraction methods.
> The result of this is that if a user selects ocr_and_text, there can be duplicate text -- text as stored in PDFs and the text generated via OCR.  In the xhtml output, we do mark a separate "div" for OCR so that users can distinguish, but still, it might be useful not to have to run OCR on text that was reliably extracted.
> One solution to this was proposed by [~lfcnassif] on TIKA-3258, with a technical/implementation recommendation by [~tilman] to subclass PDFRenderer and PageDrawer to render only the image components of a page.
> This would be a new, non-breaking feature.  This is not a blocker on 2.0.0.



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