Dean wrote:
>I had assumed that VueScan and other scanner software already did black and
white point compensation, but I think you may be right that they do not do
black point compensation. I have done B&W compensation for area CCD cameras
I use at work and it greatly improves the uniformity.
My "experiments" are not very good, but when I coupled a totally dense
(color) neg with a totally clear neg on a single frame in my Scanwit,
neither the native MiraPhoto driver nor Vuescan did much of a job of
compensating. Both halves of the "frame" wound up very noisy on the first
(and supposedly calibrating) pass. It was easily possible to
compensate--that is, to adjust half of the frame to black and the other half
to white--but the results of subsequent neg scans wasn't something you'd
want to send home to your mother! ;-)
There's some good chance that I did the experiment wrong, so if others have
tried it with success, I'd welcome your reports.
Best regards--LRA
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