Digital BW, The Print

Jon,

> Mathematically:  Beyond trivial response functions (i.e. an impulse
> function), multiple A(F)'s can produce the same outputs.  I.e. an output
> does *not* map to a unique input.

It does NOT have to map to a unique input, it has to map to the same
response as the B&W film does, and as you should know, B&W film renders
different colors the same.

This is all quite interesting, as MANY people convert RGB images to
grayscale, and they look quite good.  If this was so inaccurate and
horrible, then how DOES that work so well?

Austin