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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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rock_txt.cxt
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00197_Text_ref05t.txt
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1997-02-04
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Clearly it is the relations
within the picture that are
similar to those within the
image of the scene, not
absolute properties. The actual
size of the picture and
everything in it are immaterial
as long as all the objects and
distances are drawn to scale
from the point of view of the
artist and they are drawn in
perspective. Although the use of
color is important in achieving
a realistic likeness to a scene
rich in color, its absence, as
drawings, woodcuts, and black-
and-white photographs show,
does not prevent recognition of
the things depicted.
I must confess, however, that
I have oversimplified the
problem. Although a photograph
of a scene will yield an image
very similar to that directly
yielded by the scene itself,
paintings and drawings will not
necessarily do so. Even
photographs entail some
important differences. The
maximum reflectance
difference between the lightest
and darkest region in a
photograph is no more than a
factor of around 30, for
example, whereas regions in
the scene itself can differ by a
factor of 100,000 or more.
Drawings and paintings are
limited in the same way, and
these limitations present
artists with a challenge when
they want to represent very
light or strongly illuminated
regions.