Message-ID: <loom.20130612T205139-924@post.gmane.org>
Date: 2013-06-12T18:57:13Z
From: Ken Knoblauch
Subject: grDevices::convertColor XYZ space is it really xyY?
Bryan Hanson <hanson <at> depauw.edu> writes:
>
> grDevices::convertColor has arguments 'from' and 'to' which can
take on value 'XYZ'. Can
someone confirm
> that 'XYZ' is the same as the CIE chromaticity coordinates
are also sometimes refered to
as 'xyY' in
> the literature? Or are these the CIE tristimulus values?
It looks to me like the first case is
true, but I
> would appreciate hearing from one of the people in
know. Thanks, Bryan
>
>
I.'d look at the code or put in some known data to test it,
but XYZ are tristimulus values and xyY are chromaticity
coordinated and the luminance which is the Y tristimulus
value for the CIE 1931 standard observer.
Ken