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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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00130_Field_130.txt
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1996-12-31
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991b
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33 lines
The two sets of figures at
left illustrate the logic of
stereograms. Suppose that the
smaller square in the upper set
of figures is in front of the
larger square and that you are
looking at them head-on. To the
left eye, the projected image
would appear as figure A; to the
right eye, it would appear as
figure B. These two patterns,
when combined, create the
impression of depth. If the
smaller square were behind the
larger one, they would appear
to the two eyes as in the lower
set of figures. Notice, therefore,
that depth can be reversed
stereoscopically simply by
transposing the left and right
stereogram patterns. Inverting
or reversing the left-right
orientation of the patterns will
have the same effect.
Viewed as stereograms, the
upper set of figures will appear
as a small square floating in
front of a large square, and the
lower set of figures will appear
as a large square floating in
front of the small one.