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: Graeme Gill <email@hidden>
- Date: Tue, 08 Dec 2009 11:49:03 +1100
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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