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Topic: Optical Illusion (Read 3354 times) |
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Ken_Wiley
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If you stare at the black "+" in the center, the moving dot turns to green.
Now, concentrate on the black "+" in the center of the picture. After a short period, all the pink dots will slowly disappear, and you will only see only a single green dot rotating.
It's amazing how our brain works. 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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| « Last Edit: Dec 28th, 2006, 5:37pm by Ken_Wiley » |
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raven
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"Why is a raven like a writing desk?" ~M. Hatter
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Re: Optical Illusion
« Reply #1 on: Dec 28th, 2006, 6:38pm » |
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Focus on any one flower and the rest will spin, change your focus to a spinning one, and it will stop...
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Ghost Sniper
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Do not hide. It is useless.
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Re: Optical Illusion
« Reply #2 on: Dec 28th, 2006, 8:01pm » |
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Where do you find all these optical illusions?
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*sob* I miss my mommy... *blows nose* huh, I'm on? oh right.
(thinks to self) Time for my speech to these college kids.
"Reason is more important than all emotions..."
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raven
Senior Riddler
"Why is a raven like a writing desk?" ~M. Hatter
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Re: Optical Illusion
« Reply #3 on: Dec 28th, 2006, 8:36pm » |
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I don't remember now. 
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towr
wu::riddles Moderator
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Re: Optical Illusion
« Reply #4 on: Dec 29th, 2006, 12:38am » |
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You should be able to find quite a few just googling. I remember there's a site that collects quite a few, it'll probably come up somewhere on top..
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Wikipedia, Google, Mathworld, Integer sequence DB
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SMQ
wu::riddles Moderator
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Re: Optical Illusion
« Reply #5 on: Dec 29th, 2006, 5:55am » |
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This one, to me, is still one of the simplest and most unbelievable: squares A and B are the same shade of gray!
--SMQ
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--SMQ
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revenge
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Posts: 61
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Re: Optical Illusion
« Reply #6 on: Dec 29th, 2006, 7:13am » |
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Do you mean the two squares or just the letters A and B? If it is the squares, then it is truly unbelievable!
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Icarus
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Re: Optical Illusion
« Reply #7 on: Dec 29th, 2006, 7:25am » |
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He means the entire square. When I first encountered this one, I photoshopped a piece of one square by the other just so I could confirm it, because it seemed such a ridiculous claim.
But it is true.
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"Pi goes on and on and on ...
And e is just as cursed.
I wonder: Which is larger
When their digits are reversed? " - Anonymous
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raven
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"Why is a raven like a writing desk?" ~M. Hatter
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Re: Optical Illusion
« Reply #8 on: Dec 29th, 2006, 7:48am » |
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I stumbled upon the squares one some time ago on Wikipedia, I also sampled the colors of both squares, squinted my eyes real tight, and waved a feather in the air...needless to say, the two squares are the exact same color and saturation.
Good one SMQ 
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towr
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Re: Optical Illusion
« Reply #9 on: Dec 29th, 2006, 12:23pm » |
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If you blur your vision, you can see it.
From an AI perspective it is even more interesting; because figuring out these illusions helps you find the tricks that, apparantly, are usefull for (realtime) vision systems.
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Wikipedia, Google, Mathworld, Integer sequence DB
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Ken_Wiley
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Stare at the centre of the figure for a while. Some ‘scintillating’ activity will build up in the violet and blue annuli. Some observers also report a circular rotation within these regions; things will begin to “run around in circles”.
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Ghost Sniper
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Re: Optical Illusion
« Reply #11 on: Dec 29th, 2006, 1:50pm » |
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OK why is this in the "what happened" section?
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*sob* I miss my mommy... *blows nose* huh, I'm on? oh right.
(thinks to self) Time for my speech to these college kids.
"Reason is more important than all emotions..."
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Ken_Wiley
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Re: Optical Illusion
« Reply #12 on: Dec 29th, 2006, 1:56pm » |
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to get you to figure out what happened.
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SMQ
wu::riddles Moderator
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Re: Optical Illusion
« Reply #13 on: Dec 29th, 2006, 1:59pm » |
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on Dec 29th, 2006, 1:56pm, Ken_Wiley wrote:| to get you to figure out what happened. |
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Wha happen?! My head asplode!
--SMQ
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--SMQ
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thecow135
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Re: Optical Illusion
« Reply #14 on: Dec 29th, 2006, 8:27pm » |
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lol ur ass 'ploded! haha nice... this 1 girl in my class keeps saying i dont have an ass... does it matter!!! but everyday she bugs me about it it gets annoying XP
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cuz everybody noe that the game dont stop try to make it to the top fo ur ass get popped
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Whiskey Tango Foxtrot
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Sorry Goose, it's time to buzz a tower.
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Re: Optical Illusion
« Reply #15 on: Dec 29th, 2006, 9:43pm » |
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...
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"I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use." - Galileo Galilei
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alien2
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Re: Optical Illusion
« Reply #16 on: Dec 30th, 2006, 12:34pm » |
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Comparison: not to have a pair of perfect eyes can be fun. Is god bored because his eyes are perfect, so he misses nice optical illusions? Regarding the above illusions, god sees everything, meaning he sees nothing. We do not see pink dots, so we see everything.
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Ken_Wiley
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another...
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thecow135
Full Member
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Re: Optical Illusion
« Reply #18 on: Dec 31st, 2006, 12:18pm » |
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dammit iceman y must u alwayz go into one of your profound and infinitely impossible to understand speeches of yours lol it kills me to read it =P
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cuz everybody noe that the game dont stop try to make it to the top fo ur ass get popped
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Roy42
Senior Riddler
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Re: Optical Illusion
« Reply #19 on: Dec 31st, 2006, 5:50pm » |
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I would guess that it is because it's what he does, apart from threaten to zap me and land his spaceship on me.
P.S Happy New year!
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Regards,
≈Roy42
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Roy42
Senior Riddler
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Re: Optical Illusion
« Reply #20 on: Dec 31st, 2006, 5:54pm » |
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on Dec 28th, 2006, 5:37pm, Ken_Wiley wrote:If you stare at the black "+" in the center, the moving dot turns to green.
Now, concentrate on the black "+" in the center of the picture. After a short period, all the pink dots will slowly disappear, and you will only see only a single green dot rotating.
It's amazing how our brain works. 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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And after the pink dots "dissapear" look away from the cross and you see a ring of green dots
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Regards,
≈Roy42
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alien2
Uberpuzzler
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Re: Optical Illusion
« Reply #21 on: Dec 31st, 2006, 6:13pm » |
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on Dec 31st, 2006, 5:50pm, Roy wrote:
Happy New Year! Can you say that to a 99 years old earthling who still has personality?
on Dec 31st, 2006, 12:18pm, thecow135 wrote:| dammit iceman y must u alwayz go into one of your profound and infinitely impossible to understand speeches of yours lol it kills me to read it =P |
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God is the biggest riddle out there, so I thought it might be appropriate. Are you trying to say that nobody likes a riddle only god can solve?
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Michael Dagg
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Re: Optical Illusion
« Reply #22 on: Dec 31st, 2006, 7:31pm » |
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I saw the first one here with pink dots a long time ago
made up with nixie tubes. Nixie tubes are vacuum tubes
made for the purpose of doing what LEDs and LCDs do
these days (but definitely predate them).
I remember the background was made up of simply a
piece of white poster board in front of which were the
nixies and with a black dot on the poster to make the plus.
It does the same thing and I think it is call the Troxler effect.
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Regards,
Michael Dagg
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flamingdragon
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Re: Optical Illusion
« Reply #23 on: Dec 31st, 2006, 8:05pm » |
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Here's a 3-D one, these two fellas are the same size!
BTW Ignore my cursor in the middle of the pic.
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| « Last Edit: Dec 31st, 2006, 8:06pm by flamingdragon » |
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"The fool doth think he is wise, yet the wise man knoweth himself to be a fool"
"He who commands the past, commands the future. He who commands the future, commands the past."
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