Hi norman, On Sun, Apr 6, 2008 at 8:13 PM, norman <[EMAIL PROTECTED]> wrote: > > > It sounds to me like norman does have color management, but his viewer > > either doesn't support it or color management info isn't being saved. > > To avoid these kind of problems, I convert the final image to the > > NativePC profile available at the following URL: > > http://www.aim-dtp.net/aim/download/aim_profiles.zip > > > > before trying to display it elsewhere. > > This ensures that it will display fairly normally even if there is > > some problem with color management. > > Thank you very much for trying to help me with my image viewing > problems. The more I read the more complex things appear to get but I am > learning. However, could I return to the examples which started this > thread. We have constants and variables. The constants, for me, are the > hardware and the images, the variables are the software. The images were > produced by my son, using his hardware running Ubuntu 7.10, and Bibble > Pro, from RAW images I supplied, and were made available to me in JPEG > without any image size reduction. > > I viewed these images using Eye of Gnome 2.20.1 (Image Viewer) which is > the default Ubuntu viewer, gThumb 2.10.6 and GIMP 2.4.2 with the > following results:- > > gThumb and GIMP produced, as far as I could see, the same image but Eye > of Gnome produced an image that I can only describe as having more > punch. In layman's language the colours were brighter and the detail > sharper. Maybe I am just expecting too much but then, unless my son and > I use the same software to prepare and view our images, how can we help > each other to improve our photography?
Further points that might help: a) GThumb does not support color management, so what you see in GThumb should be typical of a non color managed display. b) GIMP has a correctly color managed display... providing you have the right profiles assigned. NativePC is a reasonable display profile to choose if you have no monitor-specific profile. If the image then does not display as you expect, then its profile is incorrect. Your RAW processing software should allow you to assign a profile to your image; GIMP also allows you to assign a profile and convert to a profile. Assigning a profile rather than converting to it can cause the types of discoloration you describe. Only assign a profile if you are sure that the image data is already in that format (eg. only assign a linear profile if the image data is already linear.) (however, if this were your problem, I expect you would notice it immediately... UNLESS, as Sven suggests, you may have colour management disabled. Check that it's enabled under View->Display Filters, and consider altering the relevant part of the preferences to 'color managed display' Hope that helps. _______________________________________________ Gimp-user mailing list [email protected] https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
