[Leica] question about image viewing and profiles

[Don Dory]

Running latest IOS the images look almost identical; definitely not muddy
whites are almost white and the black point is close.

On Thu, Apr 23, 2020 at 12:01 PM Brian Reid <reid at mejac.palo-alto.ca.us>
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.
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>


-- 
Don
don.dory at gmail.com