Yes, the q/a program will show "only noise" still, the doctors won't
allow you to trhow away that information. Maybe if you average 4 pixels
together that you get a little information. This IS visible to the
naked eye.....
> I doubt it is any different on a compartitvely cheap UMAX scanner
> with a CCD and flurescent lighting, so just chuck the two low bits
> from each cha= nnel, which are probably noise anyway and treat it as
> a noiseless 24bit scanner= =2E
Things like good 12bit a/d converters are getting cheaper and cheaper.
I wouldn't discard a (still sold as "professional") modern scanner as
junk when you've got a datapoint of a few years ago.
How do you measure the "just noise" in a 12bit scanner? I'd try to
generate a perfect analog greyscale and scan that.
Roger.
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