In article <002c01c713ff$1105ced0$4804010a at uatempname>,
    <arcarlini at iee.org>  writes:
  For my first few manuals I did redo pages in greyscale
if they
 had a photo but I stopped because I could not see a difference. 
I noticed a difference on the ones I scanned.  I just scan /pages/ in
grayscale when that page contains a photo.  I don't scan the whole
manual in grayscale just because there's the occasional photo.
How the source material was printed makes a big difference in how you
should scan it.
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