Re: MS Color Control Applet
Re: MS Color Control Applet
- Subject: Re: MS Color Control Applet
- From: "Olivier Desmaison" <email@hidden>
- Date: Tue, 27 Jun 2006 18:45:18 +0200
Marco,
I was under the impression that when you visualise a color space gamut, this
is unrelated to rendering intents since there's no conversion involved, only
"volume" display as defined by white point and primaries (bkpt tag reads XYZ
000). I cant' recall the software to offer me any choice of intent nor BPC.
I might very well be wrong since ColorThink does this.
Regards.
Olivier
----- Original Message -----
From: "Marco Ugolini" <email@hidden>
To: "Olivier Desmaison" <email@hidden>
Cc: "ColorSync Users Mailing List" <email@hidden>
Sent: Tuesday, June 27, 2006 6:16 PM
Subject: Re: MS Color Control Applet
In a message dated Jun 27, 2006 2:30 AM, Olivier Desmaison wrote:
Thanks for this reply. I agree nothing can really be taken for granted.
Meanwhile, I use X-RITE ColorGamut usually to check on gamuts : the view
in
it shows that Prophoto is "larger" in all ways than AdobeRGB, and
encompasses it all. This added to "common acceptance" about Prophoto
puzzles
me. I have found a possible explanation in the need to adap white point
(Prophoto is D50 while Adobe RGB is D65), but I believe the graph would
not
show the way it does : it would be a more "total gamut shift" (to express
it
the best I can).
Hi again.
When comparing color spaces on a 3D graph, I think the correct way is to
use the absolute colorimetric rendering intent (which is the way
ColorThink does it), that is to say, *not* to adapt the white point, and
certainly not to perform any black point compensation.
I do not use X-RITE ColorGamut, but it seems from what you write that it
uses RelCol, possibly with BPC.
Regards.
--------------
Marco Ugolini
Mill Valley, CA
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