[poppler] CMYK JPX image interpreted as RGB (with testcase + example images)

[Leonard Rosenthol]

Acrobat's Object Inspector reports this about the image:


Filled Path: Image

ColorSpace: Indexed ICCBasedCMYK, U.S. Web Coated (SWOP) v2

Image Attributes

size: 49 x 127 pixels (0.327 x 0.844 in)

bits/pixel: 8

resolution: horizontal 149.981 pixels/in vertical 150.415 pixels/in

filters: JPEG2000

Overprint=False OPM=1 ri=Relative Colorimetric



From: Harry Roberts <harry at midnight-labs.org<mailto:harry at midnight-labs.org>>
Date: Wednesday, February 6, 2013 12:30 PM
To: "poppler at lists.freedesktop.org<mailto:poppler at lists.freedesktop.org>" <poppler at lists.freedesktop.org<mailto:poppler at lists.freedesktop.org>>
Subject: [poppler] CMYK JPX image interpreted as RGB (with testcase + example images)

Hi Poppler folks,

 I encountered a weird bug with some images in a PDF. It seems like CMYK data is being interpreted as RGB data, or something similar to that - the pixel stride is off causing the image to be repeated multiple times.

 PDF Page file can be downloaded from: http://derp.ltd.uk/843-21307-16.pdf

Example of problem image, extracted with pdfimages: http://i.imgur.com/YSTCKkb.jpg
The image shows with `pdfimages` as:
page   num  type   width height color comp bpc  enc interp  object ID
---------------------------------------------------------------------
   1     7 image     759   185  cmyk    4   8  jpx    no        68  0

I have tested 2 versions of Poppler with 2 versions of LCMS and exhibit the problem. Google Chrome also has similar problems.

 *   Evince from Ubuntu 12.10 (Poppler 0.20.4-0ubuntu1.1 with LCMS2 2.2+git20110628-2ubuntu4) without openjpeg
 *   pdftoppm - Poppler 0.22.0 + LCMS 1.19 (custom build) - without openjpeg

Example page images:

 *   Ghostscript: http://i.imgur.com/dfLLptb.jpg
 *   Photoshop: http://i.imgur.com/BylwJWW.jpg
 *   Poppler: http://i.imgur.com/8cderTo.jpg (shows buggy image)

The PDF was processed using SmartCreate by QuadGraphics, combined by Adobe Acrobat 8.0... unsure of the original software used to create the individual files.


On a related note I'm unable to build the current Poppler from git, otherwise I would've tested with it too. Getting link errors like:
  Linearization.cc:(.text+0x4dc): undefined reference to `error(ErrorCategory, long, char const*, ...)
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