Digital BW, The Print

> I think it's probably simpler than that. Given a pure color -light of a
 > single wavelength, say from a laser. Can the values of the R, B, G
 > sensors be used to estimate the response of a B&W film to that same
 > laser? Most likely not.
 >
 > However, given a complex scene illuminated by white light, I would
 > expect you could come close.
 >
 > Truman

Nay, it is almost exactly the opposite.  The more constrained the input 
function A(F), the easier it is to guess it given the bin output 
functions.  The more complex (unconstrained) the input function (i.e. the 
reflection from a complicated scene, which has a very unpredictable 
spectral response) the less likely it is your guess will be right.

Can we put this matter to bed?  If need be, we can generate example 
functions and pose the challenge.

-- 
Jon Dubovsky ( entropy@... )