Have you tried converting to LAB and then adjusting the curve in the L channel
only?
See the last section of http://www.ledet.com/margulis/LABCorrection.pdf
Maris
----- Original Message -----
From: "Jawed Ashraf" <Jawed@cupidity.force9.co.uk>
To: <filmscanners@halftone.co.uk>
Sent: Thursday, November 22, 2001 4:00 AM
Subject: RE: filmscanners: Re: Nikonscan v VueScan
| Yes I've tried curves of all kinds. I just wish I hadn't pursued the "flat
| is best" school, because it was a very serious waste of time (well, OK, I
| learnt to reject it).
[remainder snipped]