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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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00084_Text_res29t.txt
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1997-02-04
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33 lines
If constancy were a fact of
knowledge rather than
perception, the appearance of
things ought to be governed by
their retinal stimuli, and the
achievement of constancy
should be a corrective added by
our reason. If appearance were
governed by the retinal image,
different objects of equal
luminance should look as if
they are the same shade. But in
fact, a black object in bright
sunlight and a white object in
shadow hardly look alike.
Furthermore, in the earlier
photograph of white stairs, the
stairs in shadow do look like
the stairs in sunlight, although
their luminances are quite
different. And, in the
illustration to the left, the
visual angle of the woman and
man in the left foreground is
the same as that of the same
woman and man in the
background, but they do not
appear to be the same in size. In
both these instances, if we saw
the objects in life rather than
in pictures, the differences
would appear even greater.