John Francis wrote:
Anyway, just ignore the big words and consider the example I gave. If a colour patch illuminated by two different lights maps to the same tristimulus value for a given sensor (such as, say, the RAW readings) then there's nothing you can do from then on to find out whether the illuminant was a pure monochromatic source or a broad-spectrum light source, so you can't decide how a different sensor, with rather different sensitivities, would respond to that subject.
One other thing I should mention is a company in Florida some years back called Laser Photo or something similar, that would take your K25 slides and scan them, make an enlarged internegative on color film using tri-color lasers and using a mapping that took into account the absorptive qualities of all the films and papers involved, and finally produce a print that was as close as I have ever seen to real life on paper. So, there may be cases where there is some metamerism involved, but in an actual application of the simple concept of mapping RGB values sure did produce some unbelievable results.
rg
