"William Robb" <[EMAIL PROTECTED]> wrote: >From: "Mark Roberts" >>> >>>Assume 8 bit gray scale. That means 256 distinct shades of gray >>>from >>>0 (full black) to 255 (full white). >>> >>>A change from one shade to the next, say from level #240 to #241 is >>>very small in percent, but if you go from shade #1 to #2 it's a 100 >>>percent increase. >> >> Only if you're using a linear scale. > >Don't scanner work on a linear scale?
Nope. Log. Just like our eyes. Both my scanners have an option for using linear, but I've never used it. -- Mark Roberts Photography and writing www.robertstech.com
