Re: real world wide gamut monitor - HP LP2475w - calibration with Spyder3
Re: real world wide gamut monitor - HP LP2475w - calibration with Spyder3
- Subject: Re: real world wide gamut monitor - HP LP2475w - calibration with Spyder3
- From: Steven Dobbelaere <email@hidden>
- Date: Tue, 8 Dec 2009 22:24:46 +0100
Hi,
Thanks for the clarification. Good to know.
Comparing the gamut volume values as seen in Gamutvision for my profiles would not have helped me a lot...
I just noticed that NEC is using the same color space in their SpectraView software.
http://www.necdisplay.com/cms/documents/UserManuals/SpectraView_II_UsersGuide_1.1.02_English.pdf -> page 25.
How should I interpret this color space? At what lightness level is this?
Thx!
Steven
On Tue, 08 Dec 2009 11:49:03 +1100, Graeme Gill wrote:
Steven Dobbelaere wrote:
> QUESTION1: What is the reference gamut to express a gamut coverage? 92% of what gamut?
Such expressions of gamut applied to displays are almost meaningless. Typically
they refer to a 2D projection of the gamut into a CIE Yxy chromaticity diagram,
and such a space is extremely perceptually non linear, so the ratio of
areas has little correspondence with the perceived gamut. (If there
was any interest in not being misleading they would at least use
a CIE 1976 u'v' chromaticity diagram !). The choice of (1953) NTSC primaries
as a comparison is "interesting" too, given that they are long obsolete,
and no CRTs have actually used them for many years due to the advancement
of phosphor technology.
A better way of understanding the perceptual implications of
different gamuts is to examine them in 3 Dimensions in a (roughly)
perceptually uniform space such as L*a*b* or CIECAM02 Jab.
Graeme Gill.
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