On 09/07/2014 01:47 AM, TurquoiseBee turquoi...@yahoo.com
[FairfieldLife] wrote:
How many triangles do you see in this image?
kanisza triangle, perception, perceptual hypothesis, bottom-up,
top-down, brain, cortex, illusions
The correct answer is "None."
http://www.united-academics.org/magazine/design-technology/kanisza-triangle-you-cant-believe-your-eyes/
None? Really? Pac-Men? What was the age of these academists? 23?
Actually the question is *phrased* *wrong*.
Ask any computer graphics artist how they would create this image. They
would start with one purple triangle. Why purple? We'll get to that in
a minute. Next at one point in the triangle they would *intersect *a
black circle. They would then copy the black circle and paste two more
each each point of the purple triangle. Then select all three circles
and put them on the bottom layer. This way the purple triangle overlaps
the black triangles to create the "Pac-Man". Next select the purple
triangle and copy it then *flip* the triangle. Now we have *two*
triangles forming a star. Select that new triangle and change the *fill
*color to white or background and the *stroke* (outline) to black. Push
that triangle to the bottom layer. Now we have the purple triangle on
top. Select it and change the *fill *color to white (or background) and
the *stroke *also to white.
Now you have the graphic. How many images did that take? 5. How many
images would it take if you di it the "fragmented" way? 6. And a much
more difficult image to construct that way too.
So, I as a computer person who does both graphics programming and art
see *two *triangles. Perhaps the correct question would have been "how
many *complete* triangles do you see? The answer could then be
*none***(though I need to examine the graphic carefully as the top
triangle might not actually be the same color as the background as I
perceive an edge)*.
*Oh, why a purple triangle? This is an often unused color in pictures
that artists will use temporarily for transparent areas. If purple is
used then they can use another color that isn't used in the graphic.
I'll give the academics a D+ for effort. :-D
