Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Austin 
Franklin" <darkroom@i...> wrote:
> Peter,
> 
> > Creating the right transfer function
> 
> "transfer function"?  I've never heard this called "transfer
> function"...where did you get that?

That's the general term.  Professionally I'm an engineer 
specializing in image processing.  I say transfer function because 
it's more correct.   Same reason I distinguish PPI from DPI.  

The problem with saying "curves" like lots of people here do is that 
some people are likely to only think in terms of Photoshop Curves 
tool or a Curve Adjustment Layer.   Transfer function is the generic 
term for anything that defines the relationship between some input 
value and some output value.  (or as we say in my R&D lab, "the 
relationship betweenthe the gazintas and gazoutas")<P>

And I really should say "functionS" because there's actually a 
pipeline of transfer functions between the original image file and 
the dots of ink on the paper and they all need to be characterized.