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https://issues.apache.org/jira/browse/TIKA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16638183#comment-16638183
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Tim Allison edited comment on TIKA-2749 at 10/4/18 12:46 PM:
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The two basic options (see our [wiki on OCR and
PDFs|https://wiki.apache.org/tika/PDFParser%20%28Apache%20PDFBox%29#OCR]):
1) run OCR on each inline image
2) render the page and then run OCR on that single image
My strawman, heuristic, 100% hackery proposal is this:
0) trigger OCR if fewer than 10 words are extracted from a page
1) if <= 5 inline images, run OCR on each of the inline images (strategy 1)
2) if a page contains > 5 inline images, render the full page and run OCR on
that (strategy 2)
[~lfcnassif], I _think_ (0) above derives from one of your recommendations?
Please chime in on this ticket. :D
This issue will take some time. I don't plan to move out on it any time
quickly.
was (Author: talli...@mitre.org):
The two basic options (see our [wiki on OCR and
PDFs|https://wiki.apache.org/tika/PDFParser%20%28Apache%20PDFBox%29#OCR]:
1) run OCR on each inline image
2) render the page and then run OCR on that single image
My strawman, heuristic, 100% hackery proposal is this:
0) trigger OCR if fewer than 10 words are extracted from a page
1) if <= 5 inline images, run OCR on each of the inline images (strategy 1)
2) if a page contains > 5 inline images, render the full page and run OCR on
that (strategy 2)
[~lfcnassif], I _think_ (0) above derives from one of your recommendations?
Please chime in on this ticket. :D
This issue will take some time. I don't plan to move out on it any time
quickly.
> OCR on PDFs should "just work" out of the box
> ---------------------------------------------
>
> Key: TIKA-2749
> URL: https://issues.apache.org/jira/browse/TIKA-2749
> Project: Tika
> Issue Type: Task
> Reporter: Tim Allison
> Priority: Major
>
> There are now two different ways (with various parameters) to trigger OCR on
> inline images within PDFs. The user has to 1) understand that these are
> available and then 2) elect to turn one of those on.
> I think we should make OCR'ing on PDFs "just work" perhaps with a hybrid
> strategy between the 2 options. Users should still be allowed to configure
> as they wish, of course.
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