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Illusion - Is Seeing Really Believing?
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Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
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00145_Text_rem12t.txt
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1997-02-04
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Experiments by Brian
Rogers and Maureen Graham at
Oxford University have
obtained more unequivocal
evidence that motion parallax
is a cue to relative depth.
Observers (with one eye closed)
viewed computer-generated
random dot patterns that did
not produce any impression of
depth when the observer and
the computer monitor remained
stationary. When, however,
either the monitor, which was
mounted on castors, or the
observer moved side to side, it
was arranged that each such
movement in one direction
caused a horizontal band of dots
in the pattern to move in
synchrony in the opposite
direction. This is what would
occur were there actually such
a band region in front of the
remainder of the pattern.
Under these conditions of
motion, all observers perceived
the horizontal band as being in
front of the background. Thus
the illusion of depth was
created from motion alone,
even though the display itself
was not three-dimensional.