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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4371) Improve ExtractText utility so that it can extract rotated text automatically
Date Thu, 29 Nov 2018 02:33:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702642#comment-16702642

Tilman Hausherr commented on PDFBOX-4371:

I'll open a new issue when I have more information, just testing stuff while I couldn't sleep…

180551.pdf - spaces missing

082220.pdf - that one is not rotated; without the new option, extraction looks OK, with the
new option, spaces are missing.

I suspect it is somehow related to type 3 fonts being used.

> Improve ExtractText utility so that it can extract rotated text automatically
> -----------------------------------------------------------------------------
>                 Key: PDFBOX-4371
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4371
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Text extraction, Utilities
>    Affects Versions: 2.0.12, 3.0.0 PDFBox
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Major
>             Fix For: 2.0.13, 3.0.0 PDFBox
>         Attachments: ExtractAngledText.java
> In a first step, detect all rotations by analyzing the effective text rendering matrix.
In a second step, do a text extraction for each rotation by prepending an appropriate transform
to the page content stream (so that our text has angle == 0) and then filtering any rotated
text. Test file: the file from PDFBOX-4368.

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