The distribution of the concentration of dyes is logarithmically related to the color intensity distributions of red, green, and blue.
For all of you interested in some theory on digital film correction, here’s a reference paper:
http://restorationfilms.free.fr/telechargements/CGIP2000.pdf
Thanks for sharing! So RGB is needed because it is the color space of the light filtered through the CMY film, or because the scanner is sensing in RGB? or both?
Yes, the concentration of dye is proportional to the logarithm of the amount of filtered red/green/blue light.