[argyllcms] Re: Eye of Gnome Color Management

  • From: Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Tue, 31 Mar 2009 10:24:41 -0500

On Mon, 2009-03-30 at 23:07 +0100, Alastair M. Robinson wrote:
> Hi :)
> Leonard Evens wrote:
> > Searching the eog development archives, I found
> > notes to the effect that color management only worked for files with
> > imbedded color profiles.  (This is considered a defect.)  I don't know
> > if that means it uses only the imbedded profile or if it means that it
> > will only make use of the system display profile if there is a profile
> > of any sort imbedded in the file, e.g, an sRGB profile.
> I would think the latter.  That agrees with what I see here, on Ubuntu 8.04.

Thanks Alastair.   Your confirmation of my conjecture, together with
what I've observed, is enough for me.   Unfortunately, this makes eog
more or less useless because I don't routinely add profiles to my image

One possibility would be to write a shell script which would add an
imbedded profile for an intermediate image file, call eog on the result,
and finally remove the intermediate file.   But this wouldn't work if I
wanted an eog slide show.

I hope the eog developers will deal with this matter sometime soon.  It
can't be all that difficult to do.

> > Any comments? 
> Try installing the following as your monitor profile:
> http://www.blackfiveimaging.co.uk/pathological.icc
> (dispwin -I pathological.icc
> You'll obviously have to install your real profile again when you're 
> done experimenting.)
> This is an RGB profile with an absurd gamma value, so any software which 
> honours the system monitor profile will now display very dark images, 
> leaving you in no doubt that the profile is being used.
> I've just done a 2-minute test here, and I only see the profile being 
> used if the original image (a) has an embedded profile, and (b) is a 
> JPEG file!
> Bizarrely, a greyscale JPEG with no embedded profile is also treated 
> correctly, but again, only JPEGs.
> All the best,
> --
> Alastair M. Robinson

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