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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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ILLUSION
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00202_Text_re09t.txt
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1996-12-31
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Furthermore, the
phenomenon of figure-ground
organization (as we shall see in
the next chapter) suggests that
there is a universal and
probably unlearned tendency to
perceive the region within
certain contours as a solid two-
dimensional object with a
particular shape on a
background region. For
example, in the illustration to
the left, the circle appears to us
not as a mere outlineΓÇöΓÇôwhich,
physically speaking, is all it is
ΓÇöΓÇôbut as a solid or "filled" disk.
In fact, to produce an
impression of a perimeter or
outline object only, an artist
would have to introduce
additional lines or
informationΓÇöΓÇôfor example, by
drawing a double outline or
objects inside and outside the
outline that are continuous
with one another, as shown at
left, below. If a region enclosed
by a line is spontaneously
perceived as a surface or a
thing because that is how
perceptual organization works,
there is no need to invoke
convention as an explanation
of why we tend to perceive (and
make) line drawings as
representations of a world of
objects.