[jira] [Updated] (PDFBOX-878) Incorrect text extraction when text rotation is not 0,90,180,270

["Maruan Sahyoun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maruan Sahyoun updated PDFBOX-878:
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    Attachment: rotation-rotationMagic.txt

> Incorrect text extraction when text rotation is not 0,90,180,270
> ----------------------------------------------------------------
>
>                 Key: PDFBOX-878
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-878
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Text extraction
>    Affects Versions: 1.3.1, 1.4.0
>            Reporter: David Rodríguez Alfayate
>            Priority: Major
>         Attachments: pdfbox-word-rotation.patch, rotation-rotationMagic.txt, rotation.pdf, rotation_failure.txt
>
>
> Currently text extraction only supports 0, 90, 180 or 270 degrees rotation, so text rotated in another angle is extracted incorrectly. I attached one simple PDF and the text extraction result as output from ExtractText.
> I have made a patch for the current revision (1.4.0) in which I consider any rotation in the current matrix position. I have had to refactor the considering of (0,0) as upper-left since for rotations places outside of the original asumption, could happen that a word or a line could be splitted. 
> Since we have some needs for a project in we are working, I have made changes to the way normalization and line printing is done, in the current codebase the normalize function is returing a List of Strings, my changes make this method return a List of Words, which are ICU normalized and therefore printed in the current writeLine method. In my patch I have also included a sample PDF2XML class, which converts the PDF to a XML, managing each word in a separate way.
> I submit the test-cases and the patch for your consideration.



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