Berkeley CSUA MOTD:Entry 40485
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2025/07/08 [General] UID:1000 Activity:popular
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2005/11/8-10 [Consumer/Audio] UID:40485 Activity:nil
11/8    http://www.patmedia.net/marklevinson/cool/cool_illusion.html
        work safe.
        \- weird to see "mark levinson" in a context other than highend
           speakers/audio. --psb, also not the speaker co.
           \_ Not really.  Mark Levinson was married to Kim Cattrall while
              Sex in The City was running, so his named appeared in a number
              of non-audio contexts.
        \_ this is the coolest illusion I've ever seen
           \- have you seen the pawn on the greyscale chessboard?
              that one is pretty dramatic too.
              this is also pretty good:
              http://home.lbl.gov:8080/~psb/CoolPix/continuous-motion.jpeg
              this is also interesting:
              http://home.lbl.gov:8080/~psb/CoolPix/Christ.jpg
           \_ This one isn't that dramatic but I had to crop the colors to
              prove to myself it was true:
           http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html
              What is this "pawn on chessboard" thing? I vaguely remember
              something like that.
              \- oh yeah, that is the one i meant. i guess it wasnt a pawn.
                 that one is mindboggling. literally.
        \_ I wonder if the military makes some use of these illusions, or if it
           trains its personnels to avoid being tricked by similar illusions.
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www.patmedia.net/marklevinson/cool/cool_illusion.html
If your eyes follow the movement of the rotating pink dot, you will only see one color, pink. If you stare at the black + in the center, the movi ng dot turns to green. Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating if you're lucky! There really is no green dot, and the pink ones really don't disappear. This should be proof enough, we don't always see what we think we see.
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web.mit.edu/persci/people/adelson/checkershadow_illusion.html
These checkershadow images may be reproduced and distributed freely.