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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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00198_Text_ref05t.txt
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1997-02-04
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Paintings and drawings differ
in other important respects
from the scenes they represent,
even aside from the different
ways in which two artists
might render the same scene.
Consider, for instance, the line
drawing to the left. We have no
difficulty in perceiving that
this drawing depicts a hand. Yet
this object is represented only
by lines. Furthermore, much
detail of the figure is left out.
Here, then, is a major
difference between the real
world and many pictures. In the
world, the internal and outer
contours of objects generally
consist of edges. By an edge I
mean the contour that
separates one object surface of
generally uniform solid color,
lightness, or texture from
another or from a background
surface or region. In some
pictures, however, such edges
are often represented by linesΓÇöΓÇô
simply very narrow ribbons of
uniform pigment or
reflectance. A picture often
does contain the same kind of
information that edges do in
the world, but, as is evident in
the illustration under
discussion, they need not. In
the drawing, lines suffice to
represent edges, and edges of
different kinds at that. For
example, a line can represent
the visible edge or boundary of
a finger occluding part of the
palm behind it, or it can
represent creases in the
fingers, or it can represent the
edge formed by the intersection
of a finger and its nail.
The use of lines in pictures
raises a larger issue about
perception, pictures, and art in
general that has generated
much controversy among art
historians and psychologists. Is
our perception of pictures
simply based on convention, or
is it, as I have been arguing,
rooted in the similarity of
pictures to the "picture" the eye
receives from the real scene?