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https://issues.apache.org/jira/browse/TIKA-1994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316467#comment-15316467
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Tim Allison commented on TIKA-1994:
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Great. Default is 200dpi gray png. I guessed right. :) Thank you!
I just kicked off the ocr_only run against ~300k pdfs in our corpus...looks
like it might take a few days to complete. That'll give us a baseline at
least.
> Integrate OCR with PDFParser
> ----------------------------
>
> Key: TIKA-1994
> URL: https://issues.apache.org/jira/browse/TIKA-1994
> Project: Tika
> Issue Type: Improvement
> Reporter: Tim Allison
> Assignee: Tim Allison
> Fix For: 2.0, 1.14
>
>
> Users can now run OCR on individual images embedded inline in PDFs if they
> get the configuration right.
> There are some drawbacks: 1) the text appears as an attachment if using the
> RecursiveParserWrapper, 2) text may be more cleanly extracted on the fully
> rendered page instead of on the individual images (this is still tbd).
> It might be useful to run OCR against each rendered page (instead of the
> component images).
> Integrating OCR is on the roadmap for PDFBox 2.1 (PDFBOX-1912). This will
> allow us to experiment with strategies until the cleaner integration is
> available with PDFBox 2.1.
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