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[filmscanners] Eyedroppers in Curves in Nikon Scan

  • To: lexa@www.lexa.ru
  • Subject: [filmscanners] Eyedroppers in Curves in Nikon Scan
  • From: "Jerry Lodriguss" <jml@astropix.com>
  • Date: Wed, 24 Apr 2002 01:40:31 -0400
  • Unsubscribe: mailto:listserver@halftone.co.uk

Addendum to the Gray point eyedropper behavior in Photoshop.

Using it re-maps pixel values to neutral, but not necessarily to middle gray.

For instance, in Photoshop 6.01, in curves, I have the gray point target
values specified as 128,128,128.

No auto levels or auto contrast is performed first. Eyedropper sample point
is set to 5x5.

Clicking on a gray card in an image with pixel values of 106,118,106, the
values are re-mapped to 110,109,110.  Pretty close to being neutral, but
not the specified 128,128,128.

Is this curious behavior, or am I missing something here?



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