Hi, First, thank you all for coding this great piece of software. It allows me to build a web-interface to my Mustek 12000SP scanner.
This brings me to my problem: dark scans. It would seem a gamma- correction of about 2 would solve this. I wish to do this in the scanimage commandline options, i.e. the option --gamma-table. This seems to be the only option to solve this problem, as brightness only pertains to lineart scans. I do color scans. You see, this option utterly and completely baffles me. I have no idea whatsoever about the numbers I should put there. Of course I've searched mostang.com and googled for an explanation. I've read Poynton's excellent Gamma-faq but even that does not begin to give a hint. At one time, I copied the complete mostang mailing-list archive to my harddisk and let grep sweat it out, but I seem to be the only one not understanding (or using) --gamma-table.
