[argyllcms] Re: sRGB/AdobeRGB98 vs Lab

Frédéric wrote:

In fact, I made a mistake : sRGB is about 30% of xyY diagram area. Does this diagram also contain non-real colors ? 

Yes, certainly - everything outside the spectrum locus !

Comparing areas in xyY is pretty misleading too - the
lack of correspondence with perceptual uniformity in xyY was
one of the factors that drove the development of Luv and L*a*b*.
Also, xyY gamut diagrams are usually quite misleading because they
are a 2D projection of 3D gamuts. Two gamuts may shadow
each other (project over the same area), while the 2D projection
of their 3D volume of intersection will be quite different.

Graeme Gill.

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