I made a mistake in the deployment of the color stereo versions
yesterday, now corrected (Win/Linux/Unix/OSX). And by the way, public
thanks to Rob Salgado for bringing up the possibility of color stereo
with red-cyan or yellow-blue glasses.
In the current implementation fully saturated object colors are
displayed with 50% saturation, which ensures that both eyes have
something to see. With the 50-cent red-cyan paper glasses I have, the
cyan filter almost perfectly excludes all red, but the red filter allows
quite a bit of green through, making ghosts in the view seen by the left
eye. These ghost images are more or less noticeable/annoying/distracting
depending on the details of how extreme the stereo is, the background,
etc. Even with shutter glasses there are some ghosts, though typically
less noticeable. However, shutter glasses plus a special graphics card
are a lot more expensive, and there is flicker unless you can drive the
monitor at a very high repetition rate.
It would seem worthwhile to see whether it would be possible to find a
red filter that passes plenty of red light yet excludes almost all green
(and blue). I don't know whether this is feasible, given the overlap in
sensitivity of the red and green receptors in the eye.
Bruce Sherwood
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