[Leica] question about image viewing and profiles

[Jim Nichols]

Brian, they are identical on my iMac.

On 4/23/20 12:01 PM, Brian Reid wrote:
> I've been looking into complaints that the LUG gallery is muddying 
> many images that Bill Clough is posting. They don't look muddy to me, 
> but I believe the people who say that they see mud.
>
> After some research, I determined that the majority of his images in 
> the gallery are tagged with the ICC profile "Gray gamma 2.2", which is 
> put there by his film scanner. I have a profile by that name on my 
> computer, so when I clicked on his images, the conversion was done 
> correctly by my image viewing software and I saw what he intended.
>
> I wonder how many LUG people are seeing mud. Do you see any 
> significant difference between the image quality of these two images:
>
> A: 
> http://gallery.leica-users.org/d/486424-2/Harvest_+Estes+Park_+1987.jpg
>
> B: http://reid.org/~brian/images/Estes%20Park%20with%20sRGB%20profile.jpg
>
> On my screen, those images look very similar but not totally 
> identical. I guess it depends on which software component is doing the 
> color transformation.
>
> If you don't see much of a difference, that means that your computer 
> is dealing successfully with the unusual but not illegal profile "Gray 
> gamma 2.2", which is intended as a Photoshop preview-mode 
> pseudo-profile and not an imbedded profile. I guess nobody told this 
> to the manufacturer of Bill's scanner.
>
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>
-- 
Jim Nichols
Tullahoma, TN USA