Re: PHOTO-3D digest 1263

[P3D Jim Crowell <crowell@xxxxxxxxxxxxxxxxx>]

At 2:35 PM 4/3/96, P3D Ronald J Beck 840196 wrote:

>I'm sorry, but I must disagree somewhat with the statements below
>regarding movies "are 3D" because of the movement.  While movies have
>great movement and you do get a "sense of depth", you're relying on
>"learned" depth queues.  The greatest example of this is the New York City

I'd have to disagree.  Motion parallax, an important depth cue
in movies (and in real life), is if anything more innate than
stereo.  More animals have it and it shows up earlier in life in
humans than stereo does.  Unlike stereo (which goes to pieces
pretty quickly when you move out of the fovea) it works pretty
much equally well throughout the visual field.  It's also
potentially useful over a much larger range of distances.

-Jim C.


------------------------------------------------
Jim Crowell
School of Optometry
360 Minor Hall
University of California
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jim@xxxxxxxxxxxxxxxxx
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