>>>>> 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? - Grant
