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https://issues.apache.org/jira/browse/PDFBOX-3074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14983130#comment-14983130
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Daniel Persson commented on PDFBOX-3074:
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Thanks for the input. Not found any good information about this embedded
content that should not be show though. Transparency groups aren't stacked and
only the data inside a marked content is actually a part of a group. Or have I
miss understood this concept?
> Mark transparency groups
> ------------------------
>
> Key: PDFBOX-3074
> URL: https://issues.apache.org/jira/browse/PDFBOX-3074
> Project: PDFBox
> Issue Type: New Feature
> Components: Text extraction
> Affects Versions: 2.0.0
> Reporter: Daniel Persson
> Priority: Minor
> Labels: github-import
> Fix For: 2.0.0
>
> Attachments: mark_transparency_groups.patch
>
>
> We try to read text from PDF files but some of the files include extra data
> that is never shown. These segments are usually grouped in transparency
> groups. So for us this function to flag a marked content as a transparency
> group is quite useful.
> If there is a way to do this please tell me or if there is a better way to
> remove text that isn't presented or drawn when the PDF is viewed then I'm all
> ears.
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