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Bug 481264 - CYMK values differ between Photoshop and Gimp.
CYMK values differ between Photoshop and Gimp.
Status: RESOLVED NOTABUG
Product: GIMP
Classification: Other
Component: Tools
git master
Other Windows
: Normal normal
: ---
Assigned To: GIMP Bugs
GIMP Bugs
Depends on:
Blocks:
 
 
Reported: 2007-09-28 12:05 UTC by George Hageman
Modified: 2007-09-28 12:17 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Image in question. The pick sample is under the "L" in MelbourneBeachHouse.com (139.47 KB, image/jpeg)
2007-09-28 12:08 UTC, George Hageman 		Details

Description George Hageman 2007-09-28 12:05:33 UTC 
I do not know if this is a bug for Gimp or Photoshop.  However, when I use the colorPick tool I get different values for the same image in the same spot. If these were close I would think it was my aim but values differ significantly.  I can send someone the image if it would help.   The image was created using Gimp. Typical CYMK values for the same spot in photoshop using an 11 pix average is:

C:35%
M:17%
Y:48%
K:0%

and for Gimp:

C:9%
M:0%
Y:21%
B:27%

The images "look" the same in both Photoshop and Gimp.

I'm running this under MS XP Professional versions 2002 SP 2
Gateway M6800, 2.13 GHz with 1GB of memory.
Comment 1 George Hageman 2007-09-28 12:08:24 UTC 
Created attachment 96323 [details]
Image in question.  The pick sample is under the "L" in MelbourneBeachHouse.com

This is as is.
Comment 2 Sven Neumann 2007-09-28 12:17:20 UTC 
The conversion from RGB to CMYK is not well-defined and due to black pullout, there even exists a wide range of equivalent CMYK colors for any given RGB color. So it is not surprising that you get different results. This is not a bug.