[R] plotting CIE chromaticity diagram?

[Ken Knoblauch]

ishi soichi <soichi777 <at> gmail.com> writes:
 
> Has anyone plotted or is it possible to plot
> 
> CIE *xy* chromaticity diagram
> 
> http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg
> 
> I need this plot in color.
> 
> ishida
 
<sermon>
And following up on my previous mail (diatribe), after
having contemplated the image at the link that you
provide, there is another significant distortion to take
into account in the representation that you propose.
Suppose that you are considering the appearance of
isolated, centrally viewed lights in isolation, in neutral
adaptation by an observer whose vision corresponds to
the average observer of CIE1931.  Then, the set of primaries 
that you will be using to generate those colors (on a screen
or on paper) will have a gamut that excludes a significant
portion of the diagram, so that if you take this limited gamut
and stretch it out to fill the diagram, then the coordinates of
the colors indicated will deviate significantly from the positions
in which they are represented (not to even speak of their
appearance).  So, in general, while this leads to a pretty
diagram, there is a lot of potential for misunderstanding
in such a (mis)representation.  </sermon>

-- 
Kenneth Knoblauch
Inserm U846
Stem-cell and Brain Research Institute
Department of Integrative Neurosciences
18 avenue du Doyen Lépine
69500 Bron
France
tel: +33 (0)4 72 91 34 77
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