[ale] OT: Optical Illusion.

[Michael H. Warfield]

Someone at the meeting tonight asked me to post the URL to the colored
spiral optical illusion I had with me.  Here it is:

http://topcultured.com/an-illusion-so-impossible-i-had-to-double-check-in-photoshop/

The blue and the green strips in the image are actually the exact same
color.  June wouldn't believe it so I used gimp to create two squares on
a white background in another image and used the dropper tool to fill a
square from the blue and a square from the green (hint - start with the
blue) and they were both identical.  It's even more astonishing printed
on paper where the contrast is higher and the blue seems darker.

Mike
-- 
Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
   NIC whois: MHW9          | An optimist believes we live in the best of all
 PGP Key: 0x674627FF        | possible worlds.  A pessimist is sure of it!
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