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https://issues.apache.org/jira/browse/TIKA-3258?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Allison updated TIKA-3258:
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Description:
In Tika 1.x we currently have the fiddly mess that users have to configure OCR
of PDFs...it doesn't just work out of the box. We did this initially because
of concerns (well, reality) of crazy resource consumption for some PDFs that
can have thousands of images per page that are stitched together to make a
reasonable composite.
Since then, we've added option 2, which renders each page and then runs OCR on
that composite image rather than running OCR on each inline image...so we'll
only call tesseract once per page. Second, we've added an 'auto' mode that
runs OCR only on pages that didn't have much text extracted. While there is
plenty of room for improvement in the 'auto' heuristic, I think we should move
to running OCR automatically on PDFs as default in 2.0.0.
Users will now have to disable OCR if they have tesseract installed but don't
want to run it on PDFs.
This will be a breaking change, and we'll make sure to document it early and
often in the "Breaking Changes" sections of the readme.txt.
was:
In Tika 1.x we currently have the fiddly mess that users have to configure OCR
of PDFs...it doesn't just work out of the box. We did this initially because
of concerns (well, reality) of crazy resource consumption for some PDFs that
can have thousands of images per page that are stitched together to make a
reasonable composite.
Since then, we've added option 2, which renders each page and then runs OCR on
that composite image rather than running OCR on each inline image...so we'll
only call tesseract once per page. Second, we've added an 'auto' mode that
runs OCR only on pages that didn't have much text extracted. While there is
plenty of room for improvement in the 'auto' heuristic, I think we should move
to running OCR automatically on PDFs as default in 2.0.0.
Users will now have to disable OCR if they don't want it.
This will be a breaking change, and we'll make sure to document it early and
often in the "Breaking Changes" sections of the readme.txt.
> Run OCR on PDFs with 'auto' mode as default in Tika 2.0.0
> ---------------------------------------------------------
>
> Key: TIKA-3258
> URL: https://issues.apache.org/jira/browse/TIKA-3258
> Project: Tika
> Issue Type: Improvement
> Reporter: Tim Allison
> Priority: Minor
>
> In Tika 1.x we currently have the fiddly mess that users have to configure
> OCR of PDFs...it doesn't just work out of the box. We did this initially
> because of concerns (well, reality) of crazy resource consumption for some
> PDFs that can have thousands of images per page that are stitched together to
> make a reasonable composite.
> Since then, we've added option 2, which renders each page and then runs OCR
> on that composite image rather than running OCR on each inline image...so
> we'll only call tesseract once per page. Second, we've added an 'auto' mode
> that runs OCR only on pages that didn't have much text extracted. While
> there is plenty of room for improvement in the 'auto' heuristic, I think we
> should move to running OCR automatically on PDFs as default in 2.0.0.
> Users will now have to disable OCR if they have tesseract installed but don't
> want to run it on PDFs.
> This will be a breaking change, and we'll make sure to document it early and
> often in the "Breaking Changes" sections of the readme.txt.
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