1-i-3d

[P3D Michael Kaplan <mkaplan@xxxxxxxxxxxxxxxxxx>]

>Sure, motion parallax gives strong depth sensations, but it is distinct
from the sensations created by binocular parallax, which permits static
viewing of a scene. 

/From the experiments I've done rotating a lenticular image in front of
one eye, I don't believe it is distinct - except for the seeing
"hardware." The depth effect of viewing the rotated lenticular image with
one eye is the same as viewing the static lenticular image with two eyes.

I think motion parallax is a different thing. As I've mentioned before,
there are ads on tv where lines of typeface move across the screen at
different rates. The lines seem to image on different planes in front of
the tv screen. That works either with one or two eyes. Motion parallax - I
think - refers to the depth cues provided by objects moving in relation to
each other horizontally (or, perhaps, in *any* direction) across our field
of vision. 

The rotated lenticular images provide - in a way similar to Pulfrich - a
succession of discrete L and R images to the brain. Once the rotation (or
horizontal movement in Pulfrich) stops, the image collapses into 2D.
Rotated lenticular only requires one eye to deliver the discrete images;
Pulfrich requires two - and a "retarder" filter.

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Michael Kaplan
Professor of Architecture
University of Tennessee, Knoxville
mkaplan@xxxxxxx


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