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https://issues.apache.org/jira/browse/PDFBOX-1128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119314#comment-13119314
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Andreas Lehmkühler commented on PDFBOX-1128:
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I fixed the issue in revision 1178412, but I didn't use Simons patch, as It was
just a workaround. Separation-colorspaces had a similar issue, see PDFBOX-963
for further details.
Thanks for the pointer and the detailed description, it made it easy for me to
fix this issue !
> Wrong color space used for DeviceN operator without color space specified
> -------------------------------------------------------------------------
>
> Key: PDFBOX-1128
> URL: https://issues.apache.org/jira/browse/PDFBOX-1128
> Project: PDFBox
> Issue Type: Bug
> Components: PDFReader, PDModel
> Affects Versions: 1.6.0
> Reporter: Simon Maskell
> Priority: Minor
> Fix For: 1.7.0
>
> Attachments: DeviceN.patch, test4.pdf, test4.pdf-1.png
>
>
> I have a PDF that uses a DeviceN color space, but when using the PDFToImage
> utility I noticed that some of the text comes out as cyan.
> I tracked the issue down to when the scn or SCN operator is used without
> setting the color space explicitly (ie using the current color space). I
> have attached a patch which resolves the issue by reinstating the original
> (DeviceN) color space after using the alternate color space, otherwise the
> alternate color space (in this case CMYK) was seen as the current color space
> and the attribute of 1 for the scn operator, which was meant for the DeviceN
> color space, is used in the CMYK color space resulting in the cyan.
> I have also attached an example PDF and the result for the PDFToImage
> conversion.
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