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https://issues.apache.org/jira/browse/PDFBOX-2180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14050751#comment-14050751
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Tilman Hausherr commented on PDFBOX-2180:
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possibly related to PDFBOX-1997
> LAB color space produces wrong colors
> -------------------------------------
>
> Key: PDFBOX-2180
> URL: https://issues.apache.org/jira/browse/PDFBOX-2180
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Rendering
> Affects Versions: 2.0.0
> Reporter: Petr Slaby
> Priority: Minor
> Attachments: 000352.pdf, 0003521.jpg
>
>
> The attached example uses LAB colors. When rendering it using PDFToImage, the
> result is kind of violet, instead of black text and yellow rectangles (see
> the attached jpeg).
> When comparing 1.8 sources with current trunk, the incoming values are
> "scaled to range" in trunk PDLab#toRGB(), while this was not the case in 1.8
> PDColorState and ColorSpaceLab. As far as I can tell, in 1.8 the values were
> only "clipped to range" in ColorSpaceLab#toCIEXYZ().
> If I remove the scaling in 2.0 the rendering is correct.
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