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 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http://www.sbri.fr/members/kenneth-knoblauch.html ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
