Original scan from CD, no corrections
Slight gamma corrections added for neutral grays
It is a 512 x 768 Kodak Photo CD scan of an
Ektachrome color target slide. Picture number one is
exactly as I got it from the CD. No corrections except
cropping. Yes, it's a little off, it was that way on the
CD.
Number two is the same thing with the white, black, and
gamma points pushed around a little to achieve overall
average neutral grays. The temptation was to go wild
with the white, black, and gray color correction eye-droppers
in Photoshop. You can get a very nice display
that way, but you damage several of the colors.
I addressed five points on the RGB transfer curves
(image\adjust\curves) and gently pushed each point of
each curve around slightly until everything that was
supposed to be gray was, on average, gray. The white,
black, and gray points were maintained, but the spread
between colors (color cast) has been reduced. It's a
slightly noisy scan, so I didn't even try to hit everything
exactly.
The woman's face is a total loss. I got her to look good
only after cutting her out, applying full color correction,
and then pasting her back in. Nobody will ever see that
picture except me.
The second picture may be handy for a printer test. It
has enough different colors to be very informative. If
the printer does anything wrong, you're probably going
to see it.
6/3/97
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