[Poppler-bugs] [Bug 60383] CMYK JPX image interpreted as RGB

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60383

--- Comment #6 from Harry Roberts <harry at midnight-labs.org> ---
Created attachment 74320
  --> https://bugs.freedesktop.org/attachment.cgi?id=74320&action=edit
Greyscale JPEG 2000 image (lower half of O)

Attached is one of the problem JPEG2000 images extracted from the PDF.

j2k_to_image from the openjpeg package displays it as black & white rather than
in CMYK. This is an openjpeg problem.

From: https://groups.google.com/forum/?fromgroups=#!topic/openjpeg/D3D1gv5FYx0
> PDF uses a superset of JP2 format known as JPX. The differences are 
> small but some of the important features are missing from OpenJpeg. 
> For instance, OpenJPEG doesn't recognize CMYK data. 
> Is there any plans to extend the library to support JPX? 

*sigh*

So the options are:

 1) Implement CMYK JPX support in openjpeg
 2) Implement CMYK JPX support in Poppler's own JPX stuff
 3) Give up and cry, it is only one PDF (I hope)

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