[Radiance-general] change image color temperature

[David Geisler-Moroder]

Hi,

a very short follow-up on this topic:
R=G=B in Radiance does not have an approximate color temperature of 6500K.
R=G=B corresponds to an equi-energy spectrum over the visible part which
has a correlated color temperature of approx. 5456K.

Best,
David




2013/4/22 Giovanni Betti <gbetti at fosterandpartners.com>

> Dear List,****
>
> ** **
>
> I have a problem that I hope the radiance community can help me understand.
> ****
>
> ** **
>
> Assume you have simulated a scene with artificial light and you have set
> the colour of the light to true white (R=G=B; approximate colour
> temperature 6500k).****
>
> I assume it should be possible in postprocessing to alter the colour
> temperature of the light source and of the scene (assuming that’s the only
> light source) using some pcomb expression (different coefficients for the
> RGB coordinates). ****
>
> Does anybody have any pointer to the math required to calculate the
> coefficient to change the light source from, say, 6500K to 3000K?****
>
> ** **
>
> Thanks in advance,****
>
> ** **
>
> Giovanni****
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>


-- 
Dipl.-Ing. Dr. David Geisler-Moroder
Hofwaldweg 14/20
6020 Innsbruck
Austria
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20130429/5eacbc22/attachment.html>