On Fri, May 21, 2010 at 1:53 PM, Grant <emailgrant at gmail.com> wrote: >>>>>> Not at all. I've seen two different units of the same scanner give >>>>>> very different tone scans with the same options set. You need a >>>>>> reference target to scan. >>>>>> >>>>>> allan >>>>> >>>>> But color management can be used after the fact, right? ?I'd like to >>>>> have a reference copy of everything I scan that I can apply things >>>>> like color management or unsharp mask to later on. >>>> >>>> Yes- if the colors are reasonable, a profile specific to that machine >>>> could be used to clean it further >>>> >>>> allan >>> >>> So if I make sure my gamma correction is always at 1.8 and I always >>> leave all the sliders alone, I should be able to produce consistent >>> reference scans that I can apply the same set of adjustments (ICC >>> profile, maybe others) to later on to produce something as accurate as >>> possible? >>> >>> I just want to make sure I'm not forgetting anything. >> >> In theory, yes. But software upgrades might change a calibration algo, >> and the sensors and lamp will drift over time, and the temperature in >> the room will change, which might cause small changes. The only proper >> way to get true stability is to run a color target periodically, and >> rebuild your profile. That implies that you should be applying the >> profile as you scan, or storing the scan of the color target serially >> with your normal scans for later processing. > > Storing the scan of the color target as I scan is an interesting idea. > ?Could the same thing be done with a "white marks" target to later > move pixels to eliminate artifacts?
Yes- though checking the manual for a calibration procedure would be easier :) allan -- "The truth is an offense, but not a sin"
