I was just curious if specifying a contrast argument to the backend is 
different from doing a
default scan and adjusting the contrast in the gimp after the scan.

I would imagine that it does mean something different in that you would be 
setting the contrast
before the A/D step in the scanner if you specified such a parameter to the 
backend.  Using the
gimp afterward to adjust the contrast would introduce additional quantization 
noise (over and
above specifying it to the backend prior).

Am I right?  Or is the backend trying to save me an extra step (essentially a 
convienence
feature)?

Chris Marshall


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