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https://issues.apache.org/jira/browse/PDFBOX-1220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler resolved PDFBOX-1220.
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Resolution: Fixed
Fix Version/s: 1.7.0
I fixed that in revision 1240494.
In some case it doesn't work to call ImageIO.write directly. PDJpeg and
PDPixelMap are now using ImageIOUtil to call ImageIO indirectly which works
like a charm.
> CMYK image cannot be extracted (empty file generated)
> -----------------------------------------------------
>
> Key: PDFBOX-1220
> URL: https://issues.apache.org/jira/browse/PDFBOX-1220
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.6.0
> Reporter: Daniel Bonniot de Ruisselet
> Assignee: Andreas Lehmkühler
> Labels: CMYK
> Fix For: 1.7.0
>
> Attachments: PDFBOX1220-WO2011140338-Page251.png,
> Screenshot-evince-WO2011140338 Page25.PDF.png, WO2011140338-Page25.pdf,
> WO2011140338-Page251.png
>
>
> Extracting the attached PDF with the following command:
> java -jar app/target/pdfbox-app-1.7.0-SNAPSHOT.jar PDFToImage -imageType png
> /tmp/WO2011140338-Page25.pdf
> This generates image WO2011140338-Page251.png (attached).
> This is a great improvement over pdfbox 1.6.0, which generates four copies of
> the image (maybe because of the CMYK encoding?). Well done!
> However the image is still of quite poor quality, apparently lower than the
> actual image data in the PDF, when displayed with acrobat reader or evince
> 2.32.0 (screenshot attached too). It would be great if that could be fixed
> too.
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