Favorite optical illusion?

ಠ_ಠ · 06-20-2009, 03:25 PM

Post your favorite optical illusion here

http://i694.photobucket.com/albums/v...5526610548.gif

MK27 · 06-20-2009, 04:13 PM

Wow. After you see it the first time, you can hold the color "in your mind" the 2nd time and slowly perceive what I guess is an after image "fading" (otherwise I tend to refocus too quickly). Rods and cones! If your pupils and time sense were severely dilated, I bet the effect would seem to take a forever

A little while ago I heard 5-10% of your rods are predictive, ie, they will fire in advance of a regularly moving object, which is part of what enables you to catch a ball and shoot pidgeons. Hopefully someone out there has a good illusion playing on that...

ಠ_ಠ · 06-20-2009, 04:16 PM

Quote:

Originally Posted by MK27

Wow. After you see it the first time, you can hold the color "in your mind" the 2nd time and slowly perceive what I guess is an after image "fading" (otherwise I tend to refocus too quickly). Rods and cones! If your pupils and time sense were severely dilated, I bet the effect would seem to take a forever

A little while ago I heard 5-10% of your rods are predictive, ie, they will fire in advance of a regularly moving object, which is part of what enables you to catch a ball and shoot pidgeons. Hopefully someone out there has a good illusion playing on that...

that reminds me of

http://mahboubian.googlepages.com/3d-Dinosaur.gif

Cactus_Hugger · 06-20-2009, 04:52 PM

I've always liked the moon, actually... it appears bigger on the horizon, but isn't. But the thing that really gets me is that if you take a picture of a 'bigger' moon sitting on a horizon with a camera, the moon will look 'smaller' / 'normal' in the photo.

Sebastiani · 06-20-2009, 06:12 PM

ಠ_ಠ, that is a pretty cool illusion.

How about this one?

Sebastiani · 06-20-2009, 06:19 PM

This one's pretty good, but you have to adjust your eyes in order to see the animation.

ಠ_ಠ · 06-20-2009, 06:26 PM

Quote:

Originally Posted by Sebastiani

This one's pretty good, but you have to adjust your eyes in order to see the animation.

wow, reminds me of the tuning fork and strobe light experiment we did in physics

(the thumb tip thing didn't help)

MK27 · 06-20-2009, 06:52 PM

Quote:

Originally Posted by Sebastiani

This one's pretty good, but you have to adjust your eyes in order to see the animation.

I could not get this one to work at all for me, but maybe it is based on the fact that the center of your eye is blind*. Five minutes and I feel like a sucker. Nothing. Where is the shark???

* close one eye, hold your thumb straight in front of you, and move it very slowly back and forth horizontally but *do not follow it*, keep your eye still and relaxed. There is a very distinct point (maybe 6-8" from center toward the outside, and 1-2" wide) where your thumb "disappears" because it is in the blind area. It is not "out of focus", if you concentrate you can see part of your hand is simply not in the picture. Gone. I showed everybody I met this for a week after it was shown to me; I could just not believe I had been walking around the whole time blind in the center of my eye like everyone else

[edit, okay I think I found it -- more like a killer whale, and facing left?]

Sebastiani · 06-20-2009, 07:07 PM

Interesting. I've never noticed that effect before. I know that some can't see stereograms due to certain visual impairments, but quite often they just don't understand the technique. Do you wear glasses?

MK27 · 06-20-2009, 07:13 PM

Quote:

Originally Posted by Sebastiani

Interesting. I've never noticed that effect before. I know that some can't see stereograms due to certain visual impairments, but quite often they just don't understand the technique. Do you wear glasses?

No; last time I was tested I had "better than 20/20", so this is probably a previous psychedelic brain injury. I think I found it tho -- facing left and sort of waggling? Of course, I imagine I could find my mother in there if I tried hard enough...

Sebastiani · 06-20-2009, 07:25 PM

>> I think I found it tho -- facing left and sort of waggling?

That's it. Once you latch onto it, relax your eyes, and the animation just sort of pops out at you.

MK27 · 06-20-2009, 08:58 PM

Quote:

Originally Posted by Sebastiani

>> I think I found it tho -- facing left and sort of waggling?

That's it. Once you latch onto it, relax your eyes, and the animation just sort of pops out at you.

I think that thing is somewhat unsafe.

ಠ_ಠ · 06-20-2009, 09:01 PM

Quote:

Originally Posted by MK27

I think that thing is somewhat unsafe.

don't worry, it's just a shark, whats the worst that could happen?

carrotcake1029 · 06-20-2009, 10:51 PM

I think this page is interesting:
The Right Brain vs Left Brain test | PerthNow

Sebastiani · 06-20-2009, 11:51 PM

Interesting. It's definitely turning clockwise for me - but then the position of the body even indicates that. Does anyone here really see it going counter-clockwise?

EDIT: OK, I did get it going the other way now, but the natural tendency is definitely clockwise, for me.

06-20-2009, 03:25 PM	#1
ಠ_ಠ Banned Join Date: Mar 2009 Posts: 533	Favorite optical illusion? Post your favorite optical illusion here http://i694.photobucket.com/albums/v...5526610548.gif __________________ ╔╗╔══╦╗ ║║║╔╗║║ ║╚╣╚╝║╚╗ ╚═╩══╩═╝
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06-20-2009, 04:13 PM	#2
MK27 critical genius Join Date: Jul 2008 Location: SE Queens Posts: 5,174	Wow. After you see it the first time, you can hold the color "in your mind" the 2nd time and slowly perceive what I guess is an after image "fading" (otherwise I tend to refocus too quickly). Rods and cones! If your pupils and time sense were severely dilated, I bet the effect would seem to take a forever A little while ago I heard 5-10% of your rods are predictive, ie, they will fire in advance of a regularly moving object, which is part of what enables you to catch a ball and shoot pidgeons. Hopefully someone out there has a good illusion playing on that... __________________ "A man can't just sit around." -- Larry Walters
MK27 is online now

06-20-2009, 04:52 PM	#4
Cactus_Hugger int x = ((int ) NULL); Join Date: Jul 2003 Location: Banks of the River Styx Posts: 902	I've always liked the moon, actually... it appears bigger on the horizon, but isn't. But the thing that really gets me is that if you take a picture of a 'bigger' moon sitting on a horizon with a camera, the moon will look 'smaller' / 'normal' in the photo. __________________ long time; /* know C? */ Unprecedented performance: Nothing ever ran this slow before. Any sufficiently advanced bug is indistinguishable from a feature. Real Programmers confuse Halloween and Christmas, because dec 25 == oct 31. The best way to accelerate an IBM is at 9.8 m/s/s. recursion (re - cur' - zhun) n. 1. (see recursion)
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06-20-2009, 06:12 PM	#5
Sebastiani Guest Join Date: Aug 2001 Posts: 5,034	ಠ_ಠ, that is a pretty cool illusion. How about this one? Last edited by Sebastiani; 06-20-2009 at 06:30 PM. Reason: pruned
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06-20-2009, 06:19 PM	#6
Sebastiani Guest Join Date: Aug 2001 Posts: 5,034	This one's pretty good, but you have to adjust your eyes in order to see the animation. Last edited by Sebastiani; 06-20-2009 at 06:29 PM. Reason: whoops, wrong post
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06-20-2009, 07:07 PM	#9
Sebastiani Guest Join Date: Aug 2001 Posts: 5,034	Interesting. I've never noticed that effect before. I know that some can't see stereograms due to certain visual impairments, but quite often they just don't understand the technique. Do you wear glasses?
Sebastiani is offline

06-20-2009, 07:25 PM	#11
Sebastiani Guest Join Date: Aug 2001 Posts: 5,034	>> I think I found it tho -- facing left and sort of waggling? That's it. Once you latch onto it, relax your eyes, and the animation just sort of pops out at you.
Sebastiani is offline

06-20-2009, 10:51 PM	#14
carrotcake1029 Registered User Join Date: Apr 2008 Posts: 309	I think this page is interesting: The Right Brain vs Left Brain test \| PerthNow
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06-20-2009, 11:51 PM	#15
Sebastiani Guest Join Date: Aug 2001 Posts: 5,034	Interesting. It's definitely turning clockwise for me - but then the position of the body even indicates that. Does anyone here really see it going counter-clockwise? EDIT: OK, I did get it going the other way now, but the natural tendency is definitely clockwise, for me. Last edited by Sebastiani; 06-21-2009 at 12:03 AM.
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