Hello,
thanks for all answers.
Both images, sRGB and AdobeRGB, look very similar, as expected both on the
sRGB and the AdobeRGB display. However, both look more vivid on the AdobeRGB
display, although some special colours like a very saturated red exhibit a
much more apparent difference again as expected. These are the
out-of-gamut colours in sRGB.
The point I was wondering about is the fact that also an image rendered in
sRGB looks better on the AdobeRGB display.
Hermann-Josef
--- Begin Message ---On Mon, Feb 15, 2021 at 05:05 Hermann-Josef Röser
- From: "Wire ~" <wire@xxxxxxxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Mon, 15 Feb 2021 18:07:50 +0100
<posts@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hello Graeme, Simone Karin, and Daniel
Thanks a lot for the detailed explanations.
The colour management should be working correctly. If I set the monitor to
sRGB the WINDOWs colour management tab shows the sRGB EIZO ICC-Profile. If I
set the monitor to AdobeRGB, the Adobe-ICC-profile is set there
automatically.
As far as I can tell, the behaviour is as described by Graeme in his last
two paragraphs. I did the comparison with PhotoShop, which is to all my
knowledge, colour managed. I looked at the images also with imgaeJ, which
definitely is not colour managed. Here on the monitor set to sRGB the
AdobeRGB image looks pale, the sRGB image alright. If I switch the monitor
to AdobeRGB, the AdobeRGB version looks alright and the sRGB version is too
saturated.
Best wishes
Hermann-Josef
Hi H-j,
You originally wrote:
"I was astonished that also the sRGB-version shows more vivid colours in the
AdobeRGB-setting, i.e. the wide gamut is also pf advantage if rendered into
sRGB, which surprised me."
So you are saying you have a color-managed system with all the parts apparently
working as desired, and you notice that an sRGB image looks more vivid when
rendered as such in Adobe RGB mode, which seems surprising because if the
display alignment is of high quality the sRGB image is expected to render the
same in either mode.
If I follow you, I myself have noticed a similar effect but ignored it. I have
not studied it carefully, and so I just presume that I am subject of some
barely conscious perceptual bias. My system can't swap profiles on the fly so
given that my awareness involves color memory, the simplest explanation has
been I'm seeing things (so to speak). So if I understand you, I cannot
corroborate your experience but I know why you are asking.
The first thing that popped into mind was whether display uses perceptual
rendering intent, and with regards to finding a perceptual fit maybe there are
rendering artifacts? I am unable to express this as a statement bc I don't
understand how perceptual rendering intent works. What Graeme describes as
display standard operating procedure (SOP) sounds like RelCol to me.
So while I can only amplify your question, for me the next thing I want to
know is how does perceptual intent work, and do display graphics libraries use
it?
Per another commenter's point about how much of the system is color-managed and
on one hand how much does OS observe in its built-in programs versus on the
other hand how does it support keeping programs informed about device profile
status, and do those programs pay attention to this information, well that's a
huge can'o'worms with a criminal poverty of documentation. It's so bad that
even Apple doesn't know what's going on in their own programs, a la the XYZ LUT
display profile rendering bug that DisplayCal has to work-around regarding
MacOS built-in apps, and Apple has always offered the best CM integration.
Your setup adds in display driver support for swapping system profile, so
yikes, the nightmare continues.
Great thread topic, and I don't know if what you describe is for realz, and CM
at its best is a quagmire :)
/wire
--- End Message ---
