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https://issues.apache.org/jira/browse/PDFBOX-2912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14968109#comment-14968109
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Tilman Hausherr commented on PDFBOX-2912:
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Could you please attach a sample PDF file?
> PDFTextStripper: positionX < previous positionX case
> ----------------------------------------------------
>
> Key: PDFBOX-2912
> URL: https://issues.apache.org/jira/browse/PDFBOX-2912
> Project: PDFBox
> Issue Type: Improvement
> Components: Text extraction
> Affects Versions: 1.8.10
> Reporter: Billow Gao
> Attachments: negativeStartX.patch
>
>
> It's possible that positionX is smaller than previous character's positionX.
> Current PDFTextStripper will not add space and extract them to one word.
> Added a patch to compare positionX < previous positionX case which can insert
> a space.
> Disabled by default.
> Tested with 10002 PDF files which had the negative positionX issue. The
> result was improved for all of them.
> In my test, I set negativeStartXTolerance to 4
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