[Radiance-general] Color Temperature

[Compagnon Raphaël]

Hi

It may be possible to estimate the color temperature from the RGB Radiance channels by:
1) transforming the RGB values into xyz trilinear coordinates
2) using an approximate formula relating xyz to color temperature.
See for instance this paper:
McCamy, Calvin S. (April 1992). "Correlated color temperature as an explicit function of chromaticity coordinates". Color Research & Application 17 (2): 142-144
http://dx.doi.org/10.1002/col.5080170211

Hope this will help you.

Raphael Compagnon

-------- Message d'origine--------
De: radiance-general-bounces at radiance-online.org de la part de Nick Calcagni
Date: mer. 02/04/2008 06:57
À: radiance-general at radiance-online.org
Objet : [Radiance-general] Color Temperature
 
My first post.... let's hope this works:

Is it possible for color temperature to be measured within Desktop Radiance?

The luminaire color temperature output can be adjusted, but can color
temperature be measured on the surface at a single point in Radiance?

Thank you,
Nick Calcagni
Drexel University

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