[Radiance-general] Color reflectance values and materials..

[iebele]

Hi Axel,

Thank you so much for posting this file. I think both your RAL file as 
the Kodak grayscale chart measurements I send in my earlier mail are 
very usefull for Radiance.

In my previous mail I mistakenly wrote that we used a Kodak 
photospectrometer for the grayscale chart from Kodak's Q-14 color 
separation guide. That chart was also measured with a Minolta device, I 
don't remember exactly wich model it was -  but it was a pretty advanced 
one that we hired for two weeks, so the file wich the greyscale 
measurements should be accurate also (which are YXZ values converted to 
Radiance RGB with a Radiance .cal file).

A list of all RAL colors in English (and other languages) can be found at:
http://www.ral.de/en/ral_farben/anwender/farbnamen_classic.php
I will be happy to translate it and send it back.

Maybe we can discuss a little bit more about the issue if such accurate 
measurements could be part of the Radiance distribution? I like to hear 
more about the pros and conts. My idea is that it would help users a lot.

-Iebele



Axel Jacobs wrote:

>
>Jan Diepens of University of Technologie Eindhoven sent me a complete
>list of RAL colours some time ago. I have to admit that they are still
>not in the ColourPicker. I've put them up for your perusal:
>
>http://luminance.londonmet.ac.uk/pickup/ral_mat.tgz
>
>If anybody is going to translate the names to English, please bounce
>the changes back to me for inclusion in the ColourPicker. The values
>were measured with a Minolta chroma meter from samples. YXZ was then
>converted to Radiance RGB with a Radiance .cal file, so the values
>should be accurate.
>
>Axel
>
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