Re: one eyed 3D

[P3D Jim Crowell <crowell@xxxxxxxxxxxxxxx>]

At 11:12 PM -0500 6/10/97, P3D john bercovitz wrote:
>> I'm sure one can see various depth cues with one eye, but I would
>> hardly call that a stereoscopic effect, which by definition requires
>> two functional eyes. :-)
>
>There is, of course, motion parallax which can be seen with one eye.
>I don't know if it uses the same pathways in the brain as stereo but
>if it does, perhaps it can legitimately be called "one-eyed stereo".
>(OK, so it's a stretch. 8-)
>

There appears to be some overlap; if you look long enough (adapt to) a
shape specified by one cue it can influence your perception of a shape
defined by the other.  Neurons in cortical area MT, one of the main
motion-processing areas, has some cells that prefer a certain amount of
binocular disparity, but it seems fairly crude (compared to what's seen
elsewhere) & may be involved in helping to segment objects rather than
computing shape from stereo.  In the earliest stages they may not overlap
much.

-Jim C.

----------------------
Jim Crowell
Division of Biology
216-76
Caltech
Pasadena, CA
(818) 395-8337
jim@xxxxxxxxxxxxxxx



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