[filmscanners] RE: 8bits vs. 16bits/channel: can the eye see the difference

["Karasev, Alexander" <alexander.karasev@gs.com>]

Actually most observers can, in smooth areas (sky, etc.) particularly in
midrange tones.

Create in Photoshop, Paintbrush, CorelDraw, or other software, two large
adjacent rectangles or other figures, one with a solid RGB24 fill of
[128,128,128] (i.e. neutral grey on the scale of 0-255), and another either
[129,129,129] or [128,128,129]. Most people who used to argue for lack of
benefit [if only in final output] of higher color depths than 8 bits /
channel, are usually quite stunned at their ability to pick up the
difference, often at a glance.

That means, the same limitations can apply to photo reproductions of
substantially high quality and low noise, of smooth areas (such as a clear
blue or uniformly "grey" sky).

Alex

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