Digital BW, The Print

Hi Anthony,

> > I do understand EXACTLY what you are saying, AND
> > I simply disagree with it.
>
> So how would you reconstruct a continuous, irregular curve of spectral
> energy distribution from just three data points?
>
> It's possible if the curve is a portion of, say, an ellipse.  But the real
> world curves aren't, so you cannot reconstruct them from three
> data points.
> And because of this, you cannot use RGB values to reconstruct the
> information you would need to accurate simulate the spectral
> response of any
> arbitrary monochrome or RGB sensor or film.  The required information just
> isn't there, period.

I understand that is what you are saying, and again, I simply disagree.  I
don't know what it is that is missing in yours and or my understanding, but
I simply don't see that it can't be done.  I have all the information I
need, the frequency and the intensity.  Both the color and B&W films
response is deterministic to the frequency and intensity...so I believe I
have the information necessary to map one to the other.  The converse is, of
course, not true, you can't go from B&W to color.

Regards,

Austin