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Just for fun - cool optical illusion — Parallax Forums

Just for fun - cool optical illusion

Beau SchwabeBeau Schwabe Posts: 6,566
edited 2007-08-25 11:09 in General Discussion
I just stumbled across this looking at optical encoders...· neat trick on the eyes!!

attachment.php?attachmentid=48808

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.
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Comments

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2007-08-21 06:36
    An animated JPEG! What's weird is that it's never the one you're staring at that rotates.

    -Phil
  • MightorMightor Posts: 338
    edited 2007-08-21 08:28
    When I cross my eyes and look at it, they don't move either [noparse]:)[/noparse]

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    | To know recursion, you must first know recursion.
  • WhitWhit Posts: 4,191
    edited 2007-08-21 11:46
    Welcome back to the 60's!

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Beau SchwabeBeau Schwabe Posts: 6,566
    edited 2007-08-21 15:16
    Phil,
    ·
    That's just it... it's not an animated JPG.· This even works if you just print it out.· If you FIX your eyes on one of the circles the remaining circles plus the one you have a fix on will lock their position, but if you catch this out of the corner of your eyes or focus on an imaginary point in-between the circles there appears to be rotational motion.
    ·


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    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2007-08-21 16:27
    Beau,

    Hee hee! I know. 'Just pulling your leg a little. smile.gif

    It's definitely one of the more maddengly elusive optical illusions I've seen.

    -Phil
  • BeanBean Posts: 8,129
    edited 2007-08-21 16:48
    One of the more interesting one's I've seen is a picture of the mona lisa upside down, but the eyes (and I think the mouth) were right side up.
    When you looked at it with the head upside down, it looked normal (just looked like an upside down picture).
    But when you turned it around (so the head is right side up) you could instantly see that the eyes were upside down.
    It was really kinda spooky.

    Bean.

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  • inakiinaki Posts: 262
    edited 2007-08-21 21:23
    By the way, this picture is the back cover of a Japanese book about optical ilussions.
    In case you want to see more of these buy the book (refer to isbn code).

    At my office some people printed that picture on t-shirts!

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  • D FaustD Faust Posts: 608
    edited 2007-08-21 22:09
    I saw something about this in an issue of "Scientific American". I think the article said it was caused by subtle eye movements.

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    LOOKDOWN ThisThread, [noparse][[/noparse]Your_?, My_?, Cool_Thing], looknum
LOOKUP looknum, [noparse][[/noparse]1, 2, 3], subnum
ON subnum GOTO Hope_this_helps, Thanks!, WOW!!
END
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2007-08-22 02:11
    Conclusion, the mind is meant to be fooled. Thus we had optical and audio illusions.

    I was reading in Nuts and Volts about how our ears actually filter you some phase shifts and short echos in real time.

    Our perceptions are not only limited. They are somewhat plastic.

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  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2007-08-22 03:59
    I was just sitting here considering the idea of converting a 3x3 clip of that image into spin using bmp2spin... [noparse]:)[/noparse]
    Wonder if it would retain the same effect on my TV... hmmmm.. [noparse]:)[/noparse]

    Oldbitcollector

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  • WhitWhit Posts: 4,191
    edited 2007-08-22 11:46
    Wonder if the the encoders will "see" them spin even if they aren't? wink.gif

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • crgwbrcrgwbr Posts: 614
    edited 2007-08-24 21:17
    Pure Awesome

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    People say that if you play Microsoft CD's backwards, you hear satanic things, but that's nothing, because if you play them forwards, they install Windows.

    I spent a minute looking at my own code by accident. I was thinking "What the heck is this guy doing?"
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2007-08-24 22:58
    Maybe this one is in that book, too...

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  • Steph LindsaySteph Lindsay Posts: 767
    edited 2007-08-24 23:15
    Wow - almonds never made me feel queasy before....
  • MightorMightor Posts: 338
    edited 2007-08-25 11:09
    Steph Lindsay (Parallax) said...
    Wow - almonds never made me feel queasy before....
    That really depends on the quantity ingested. I have tested this.

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    | To know recursion, you must first know recursion.
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