Color management: ICC color profile of embedded image is ignored in PDF/X-4

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DerAndere1
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Color management: ICC color profile of embedded image is ignored in PDF/X-4

Post by DerAndere1 »

Version: PDF Xchange editor Version 8.0 build 334 for Windows 10 64 bit

Description:
Color mangement issue: Xchange editor ignores the individual color profiles and probably falsly assumes that the files' global icc profile applies for each embedded image. This results in wrong colors displayed.

Steps to reproduce:
1. Open the attached PDF. Observe wrong colors
2. Compare how colors are displayed with e.g. Acrobat Reader DC.

Background info: ICC color profiles can be embedded in Images and PDFs to indicate how pixel values have to be interpreted by the displaying software. To display the correct colors. info about "Primaries" and "tone reproduction curve (TRC)" from each image's color profile have to be used when interpreting pixel values for display/print. The PDF/X-4 standard allows embedding of images with individual embedded color profiles (independent of the global color profile of the PDF container file).

Info regarding the attached file.
- standard: PDF/X-4
- created with: Scribus 1.5.5 (open source
- file's global ICC profile: sRGB with sRGB tone reproduction curve (TRC)
- embedded raster image file: linear 16 bit PNG with its individual embedded profile (sRGB with linear TRC), created with Gimp 2.10.14.
- The correct color profile of the imported raster image was embedded by Scribus
Attachments
PDFX-4_colorman.pdf
(1.1 MiB) Downloaded 40 times
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Paul - Tracker Supp
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Re: Color management: ICC color profile of embedded image is ignored in PDF/X-4

Post by Paul - Tracker Supp »

Hi DerAndere1,

thanks for the post and detailed explanation. We are seeing the same here and the devs are investigating.
There is a ticket related to the issue, while internal only if you refer to RT#5008: Color management: ICC color profile of embedded image is ignored in PDF/X-4 then any support staff member can get you a status update.

I hope that helps.
Best regards

Paul O'Rorke
Tracker Support North America
http://www.tracker-software.com
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