[argyllcms] Re: Percentage gamut measurements (was Re: Re: Correction for wide gamut screens and/or RGB-LED?)

  • From: adam k <aak1946@xxxxxxxxx>
  • To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
  • Date: Tue, 13 Apr 2010 12:36:36 -0400

Which monitor profile type LUT
Matrix&curves etc is most appropriate for wide gamut monitor?

Sent by AAK from iPhone 3Gs

On Apr 12, 2010, at 10:41 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:

> Keith Winstein wrote:
>> A bit of a tangent, but thought somebody here might know -- is
>> there an industry standard for how these "percentage gamut covered"
>> figures are stated?
> There's a (very poor and misleading) de facto standard.
>> I assume they put the gamut and the triangle formed by the monitor
>> illuminants in the same colorspace, and say an increment in any
>> direction is as good as any other, and calculate the fraction of
>> the gamut's area covered by the monitor's triangle.
> It's the xy chromaticity diagram triangle areas. The problems with
> this are:
> * The xy chromaticity diagram is very perceptually non-linear.
> * Gamuts are 3D not 2D.
> You can use Argyll's "viewgam -i" to get a more meaningful gamut
> volume
> comparison.
> Graeme Gill.

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