[Leica] question about image viewing and profiles

[Aram Langhans]

I see no difference on my computer.  Windows 10, Dell U2410 monitor 
calibrated with Spyder 5 Pro.

-----Original Message----- 
From: Brian Reid
Sent: Thursday, April 23, 2020 10:01 AM
To: Leica Users Group
Subject: [Leica] question about image viewing and profiles

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.