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https://issues.apache.org/jira/browse/TIKA-3416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17350521#comment-17350521
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Tim Allison commented on TIKA-3416:
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This has some overlaps with TIKA-3348 but is distinct.
> Extract logical images from PDFs
> --------------------------------
>
> Key: TIKA-3416
> URL: https://issues.apache.org/jira/browse/TIKA-3416
> Project: Tika
> Issue Type: New Feature
> Reporter: Tim Allison
> Priority: Major
>
> PDFs, bless their hearts, can store a logical image as hundreds or thousands
> of subimages that when rendered, look like one image.
> We currently have the option to let the user render the page and run OCR on
> that rendered image, or the user can extract inline images. There has to be
> a happier medium, and the user should get back the rendering in, e.g., the
> /unpack endpoint (see TIKA-3348).
> It would be handy for some use cases to do the geometry to find bounding
> boxes for image components and then render those bounding boxes so that a
> human gets a "logical image" <hand_waving>most of the time</hand_waving>.
> There would have to be some heuristics for when to give up and just render
> the whole page, but I think we could do something that performed well enough.
> More importantly, I'm sure this is a solved problem...any recs for efficient
> algorithms for this?
> What do you think?
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