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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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00186_Text_res26t.txt
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1997-02-04
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37 lines
That the eye can be fooled
into perceiving a painting or
photograph as realΓÇöΓÇôas the
things represented rather than
as a pictorial representation of
those thingsΓÇöΓÇôis not that
surprising given what we know
about pictorial cues to depth.
But the deception is effective
only in certain circumstances.
Spectators must view the
picture from the same position
from which the artist viewed it
or the camera photographed it.
This position is referred to as
the center of projection, so
called because it is the apex of
all the straight lines that could
be drawn or projected from each
point in the scene. These lines
all intersect the picture plane
such that, with the eye at the
apex, each line is the
projection of both the point in
the scene and the same point as
represented in the picture.
Only then will the rays of light
from all points in the picture
yield a retinal image exactly
like the one that is yielded by
the scene itself. If the spectator
moves away from the designated
point of observation in SantΓÇÖ
Ignazio, for instance, the
painting will look distorted and
thus somewhat unreal.