The white line at the top of the bottom half implies that the light on this hinged object is coming from above, and thus the bottom half of the
object is the same color as the illuminated line, and lighter as well than the top half of the object. But it isn’t: it is in fact the same color as
the top of the object. We compensate for the assumption that the bottom is lighter by visually interpreting it as lighter, so the object looks as if
it were in two
How about another.
This famous illusion was produced by Edward Adelson, a professor of vision science at MIT.
Squares “A” and “B” are actually the same color and shade.
Alright, that is wild! I actually copied the pic into paint, for the checkerboard one ,and copied a small section of the "darker" box, pasting it
and dragging to the "lighter" section. I see they are the same, but my brain is still protesting! Funny what our eyes can make us believe, isn't
it/ S&F, Grim.
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