How to do it
Linearising the scanner and driver software is extremely important.
This ensures that the profile has enough good data to work with.
On a good scanner this process usually involves scanning a grayscale,
then from that setting the highlight and shadow density and the
gamma of the output.
Many consumer-level acquire modules don't have these facilities
– in these cases you may like to investigate 3rd party software
solutions from Vuescan
Profiles are produced by first scanning a (IT8 style) target then
comparing the result with the digital data read from the target
If you are making both transparency and reflective scans, you’ll
need to have a profile for each as the light source and often the
optics used are different.
Profiles are generally not custom made for scanning negative film
due to the variation in base densities and exposures. In these cases
we recommend you use the suppliers profiles and make the adjustments
based on what you see on your calibrated monitor.
If you own an IT8 target, Gretag Macbeth ColorChecker or Gretag
Macbeth Digital ColorChecker you can just send us the scan of that
and we can produce a profile for your scannerand send it to you