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https://issues.apache.org/jira/browse/PDFBOX-1711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13755484#comment-13755484
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Tilman Hausherr commented on PDFBOX-1711:
-----------------------------------------

The non-sequential parser crashes:

java.io.IOException: Expected pattern 'obj but missed at character 'o'
        at 
org.apache.pdfbox.pdfparser.NonSequentialPDFParser.readPattern(NonSequentialPDFParser.java:646)
        at 
org.apache.pdfbox.pdfparser.NonSequentialPDFParser.parseXrefObjStream(NonSequentialPDFParser.java:460)
        at 
org.apache.pdfbox.pdfparser.NonSequentialPDFParser.initialParse(NonSequentialPDFParser.java:359)
        at 
org.apache.pdfbox.pdfparser.NonSequentialPDFParser.parse(NonSequentialPDFParser.java:700)
        at org.apache.pdfbox.pdmodel.PDDocument.loadNonSeq(PDDocument.java:1134)
        at org.apache.pdfbox.pdmodel.PDDocument.loadNonSeq(PDDocument.java:1117)

                
> Loss of colour precision in exporting PDF to image
> --------------------------------------------------
>
>                 Key: PDFBOX-1711
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-1711
>             Project: PDFBox
>          Issue Type: New Feature
>    Affects Versions: 1.8.2
>            Reporter: Dave Sowerby
>         Attachments: input.pdf, output.png
>
>
> In attempting to convert a PDF which makes use of CMYK colours as well as 
> colour transparencies, but the output I'm seeing doesn't match the input.  
> I'm using the command line PDFToImage and have output in a lossless format 
> and attempted to use all potential color depths to see if I can find a 
> workable option.  

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