Digital BW, The Print

>>It is a basic mathematical fact that the process of binning is
 >>*not* reversible under almost all circumstances.
 >
 > But technically this isn't "binning", because true binning is
 > mutually exclusive.   It's either in this bin or that one.  In this
 > case you have OVERLAPPING bins, and not only that but the sensitivity
 > curve in each bin is different.   So the same pixel has a signal in
 > bin A and a signal in bin B.  There is only one unique point on the
 > spectrum that would produce any give signal in both bins.

Mathematically, it is the same.  Whether the response functions overlap or 
not, except for trivial cases (again, such as an impulse function for the 
response function), the impossibility of conversion still holds.

-- 
Jon Dubovsky ( entropy@... )