On Thu, Mar 14, 2013 at 1:58 PM, jeremy rosen <[email protected]> wrote: > RGB multiplicator are the real thing... temperature is a simplification that > assumes that all light source are following a simple pattern, (I think it's > called the black corp model in english)
"black body radiator" IIRC :) > temperature is good enough for incandescent light and sunlight, but whenever > your light source is colored (like in shades where most of your light comes > from the blue sky) it doesn't work anymore and you need to compensate in RGB > space anyway. Most importantly, when you copy white balance settings, the RGB multipliers are copied, which is the only thing that matters. The temp/tint are just derived values, which sadly differ because of differences in the source image. That said... I wouldn't mind making temp absolute like for example UFRaw does... I think johannes actually took a look at that approach once before, and there were some unresolved issues with implementing something similar. At least if I recall correctly. So I guess this is just one of those things on one of those TODO lists :) > I am not sure what is "relative temperature" that Pascal mentions, he can > probably explain that better than me I don't know the mathematical details either... Hanatos needs to chime in for that... Regards, Pascal de Bruijn ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
