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01-08-2009, 07:23 PM   #76
JL514
because i can

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Quote:
 Originally Posted by Bostaevski Imagine the surface the boxes are sitting on. It's not even in the same plane I agree if you measure the lengths they are the same. I do not agree that it is the same box rotated approximately 90 degrees. EDIT: To answer your question, I'm saying that the lengths are the same because you CAN'T measure in that 3rd direction. You could build boxes just like those, set them up in those same dimensions, and then take a photograph giving essentially the same picture as what we see. But if you could examine those boxes in 3D you would see that they are not anywhere near the same shape. In fact Box 2 does not even have square interior angles.

Okay so i mistyped. The OP with this picture said the boxes are the same SIZE. ok?

01-08-2009, 07:33 PM   #77
Actually Shows Proof

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Quote:
 Originally Posted by Bostaevski Imagine the surface the boxes are sitting on. It's not even in the same plane I agree if you measure the lengths they are the same. I do not agree that it is the same box rotated approximately 90 degrees. EDIT: To answer your question, I'm saying that the lengths are the same because you CAN'T measure in that 3rd direction. You could build boxes just like those, set them up in those same dimensions, and then take a photograph giving essentially the same picture as what we see. But if you could examine those boxes in 3D you would see that they are not anywhere near the same shape. In fact Box 2 does not even have square interior angles.
This is correct, the boxes are totally different size and shape. If you measure the 2D image it might measure the same, but that's like saying if you measure your thumb and then measure the wall across the room that spans your thumb's width when you hold it at arm's length and look across it, they are the same width. This is a dumb "illusion" if you can even call it that. Everything you see in an image or in real life is a 2D image hitting our eye, our mind fills in the depth even IRL based on angles and parallax from 2 eyes. Stupid argument about this one.

 01-08-2009, 07:44 PM #78 Dids Carpal \'Tunnel     Join Date: Feb 2004 Location: Social Justice War Room Posts: 60,880 Re: Optical Illusions Thread I am so ****ing good at stereograms. I have no idea why- since one of my eyes is so bad it can't be corrected by glasses, but I totally see the schooner always.
01-08-2009, 07:48 PM   #79
Dids
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Quote:
 Originally Posted by Shinola http://www.youtube.com/watch?v=RiCQwhX4gaQ this one is awesome, makes the entire world an optical illusion.
This makes me want to get really high and do this or just totally makes it pointless to smoke because I'm equally wierded out. Very awesome.

01-08-2009, 08:09 PM   #80
JL514
because i can

Join Date: Nov 2006
Posts: 9,797

Quote:
 Originally Posted by spadebidder This is a dumb "illusion" if you can even call it that. Everything you see in an image or in real life is a 2D image hitting our eye, our mind fills in the depth even IRL based on angles and parallax from 2 eyes. Stupid argument about this one.
Okay class, today we are going to learn the definition of 'illusion'.

 01-08-2009, 08:17 PM #81 baumer Pooh-Bah     Join Date: Oct 2004 Location: Ontario Posts: 4,061 Re: Optical Illusions Thread When I was younger I figured out a way to invert the stereograms so the thing that was supposed to stick out at you actually sunk into the surrounding picture. I've been trying to repeat this just now, but am not having any luck. As far as I can remember it involved crossing my eyes slightly. I forget when I crossed my eyes. Whether it was before I had actually seen the object or after. The best one I remember doing this on was a downward spiral, so when inverted it looked like a really tall spike.
01-08-2009, 08:37 PM   #82
Actually Shows Proof

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Quote:
 Originally Posted by JL514 Okay class, today we are going to learn the definition of 'illusion'.
Cute. Go back to the picture of two boxes (#48) and the comments I referred to that followed. The illusion was supposed to be that the boxes look like different sizes but they were claimed to be the "exact same box" seen from two angles. That was false, you cannot turn box 1 at any angle and get it to look like box 2, and the boxes are not the same when extrapolated to 3D based on their images. So the illusion fails on every level. I was responding to a claim that the measurement of the boxes in 2D proved that they were the same box (when in fact that was also false).

BTW, there are many more kinds of illusions than just ones that fool our depth perception, such as ones that create motion where none exists, ones that appear in color where there is none, etc etc. So that is not a definition.

01-08-2009, 08:58 PM   #83
poker1928
grinder

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Quote:
 Originally Posted by baumer When I was younger I figured out a way to invert the stereograms so the thing that was supposed to stick out at you actually sunk into the surrounding picture. I've been trying to repeat this just now, but am not having any luck. As far as I can remember it involved crossing my eyes slightly. I forget when I crossed my eyes. Whether it was before I had actually seen the object or after. The best one I remember doing this on was a downward spiral, so when inverted it looked like a really tall spike.
Are you sure it was stereograms and not just 2D pictures of 3D objects?

 01-08-2009, 11:51 PM #84 HeroInBlack veteran   Join Date: Mar 2005 Location: Suwanee, GA Posts: 3,200 Re: Optical Illusions Thread This stuff makes me feel nauseous.
01-09-2009, 05:28 AM   #85
Ra_Z_Boy
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Quote:
 Originally Posted by Rollos This is the best one I've ever seen. The cross sections are the the same color.
Haha yeah both middle sections are a shade of grey. Thats ****ed up.

01-09-2009, 05:29 AM   #86
Ra_Z_Boy
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Quote:
 Originally Posted by jmill I feel ******ed, the 3d image comes natural to me and is really easy to see but I don't understand the illusion in OP at all. Squares are just different colors to me.
No you understand it perfectly. Thats the point. Our brains cannot see them as the same colour. Go to photoshop and use colour picker and you will see they are exactly the same colour.

 01-09-2009, 05:54 AM #87 MicroBob Carpal \'Tunnel     Join Date: Sep 2003 Posts: 61,580 Re: Optical Illusions Thread OMG. I just put a bunch of browser windows over the other various parts of the picture so that I could only see the two cross-sections and they indeed both are the same shade of gray which is just ridiculously freaking and weird. Another one of those where you could put a gun to my head and ask, "are those the same color or different?" and I would be a dead man.
01-09-2009, 05:59 AM   #88
MicroBob
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Quote:
 Originally Posted by 27offsuit actually... Spoiler: two images stick out that say 'stop wasting your time' 'and get a life'
bottom frogs and farm server
her start spit has car go

01-09-2009, 01:48 PM   #89
Patton4
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Quote:
 Originally Posted by baumer When I was younger I figured out a way to invert the stereograms so the thing that was supposed to stick out at you actually sunk into the surrounding picture. I've been trying to repeat this just now, but am not having any luck. As far as I can remember it involved crossing my eyes slightly. I forget when I crossed my eyes. Whether it was before I had actually seen the object or after. The best one I remember doing this on was a downward spiral, so when inverted it looked like a really tall spike.
This is actually the only way I can see them, and why I can never tell what the hell it is supposed to be. Absolutely frustrating. I see the image going inward rather than out to me. It looks like a big pit and is very much in 3d, but makes it nearly impossible to tell what you are looking at. I do cross my eyes a bit to get it that way though.

01-09-2009, 02:39 PM   #90
Tater10
grinder

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Quote:
 Originally Posted by baumer When I was younger I figured out a way to invert the stereograms so the thing that was supposed to stick out at you actually sunk into the surrounding picture. I've been trying to repeat this just now, but am not having any luck. As far as I can remember it involved crossing my eyes slightly. I forget when I crossed my eyes. Whether it was before I had actually seen the object or after. The best one I remember doing this on was a downward spiral, so when inverted it looked like a really tall spike.
If you cross your eyes (focal point before image) you will see the invert, and if you relax (focal point after the image) you will see the intended 3d image.

Your mind will 'focus' the image both ways, when the focal point of your eyes is actually behind of in front of the image.

01-09-2009, 02:55 PM   #91
27offsuit
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Join Date: Jul 2004
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Quote:
 Originally Posted by MicroBob bottom frogs and farm server her start spit has car go

I'm totally lost.

Edit: Actually, I see that those words are throughout that stereogram. Are you alluding to anything more specific than that?

01-09-2009, 04:46 PM   #92
diddy!
Twas diddyeinstein

Join Date: Jul 2007
Location: Arkansas
Posts: 10,853

Quote:
 Originally Posted by MicroBob OMG. I just put a bunch of browser windows over the other various parts of the picture so that I could only see the two cross-sections and they indeed both are the same shade of gray which is just ridiculously freaking and weird.

Thanks for the hint, it worked perfectly.

01-09-2009, 04:49 PM   #93
diddy!
Twas diddyeinstein

Join Date: Jul 2007
Location: Arkansas
Posts: 10,853

Quote:
 Originally Posted by 27offsuit When I first saw the OP's illusion somewhere else, it had the ability to click on it and everything disappeared except for the 2 boxes, which made it even freakier.
Anyone found a link for this?

01-09-2009, 05:03 PM   #94
swingdoc
Pooh-Bah

Join Date: Dec 2006
Posts: 3,531

Quote:
 Originally Posted by diddyeinstein Anyone found a link for this?
No, but this one is crazy too. Top and bottom greys are the same color.

01-09-2009, 06:03 PM   #95
SoloAJ
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Quote:
 Originally Posted by swingdoc No, but this one is crazy too. Top and bottom greys are the same color.
This one I can actually see how they are the same color a little bit. I definitely can't see it for the life of me in the cross sections one.

 01-09-2009, 06:26 PM #96 BillNye Carpal \'Tunnel     Join Date: Mar 2005 Posts: 10,043 Re: Optical Illusions Thread cross section one is best illusion ive seen imo
 01-09-2009, 06:44 PM #97 antidan444 Carpal \'Tunnel     Join Date: Jul 2003 Posts: 20,431 Re: Optical Illusions Thread This is weird, the only way I can see the woman spinning is clockwise, and yet several other people say they can only see it going counterclockwise. Whoa.
 01-09-2009, 06:45 PM #98 antidan444 Carpal \'Tunnel     Join Date: Jul 2003 Posts: 20,431 Re: Optical Illusions Thread Oh wow at post 41. That's awesome.
 01-09-2009, 07:01 PM #99 spadebidder Actually Shows Proof     Join Date: Aug 2008 Location: This looks interesting. Posts: 7,906 Re: Optical Illusions Thread If you look very carefully at the picture below, after a few seconds you will be able to see several people in the background. Last edited by spadebidder; 01-09-2009 at 07:09 PM.
01-09-2009, 07:06 PM   #100
findingneema
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Quote:
 Originally Posted by 27offsuit OK found one. Some of you guys are about to be tilted because you won't be able to do it, but inside of this pic is a little 3D doggy... My best advice for seeing it: Click on this small image and use the larger one. Don't look at it, look through it. Don't look at one part, look at all of it. Blur your eyes a little and the 3D image becomes crystal clear. Once you're locked in, you can move your head left and right slightly and the dog moves in this 3d 'world' Even though I've done this a hundred times, sometimes it still takes a few seconds to get into the 3D world, but you'll know once you're there. Good luck! Edit: They're called sterograms.
Quote:
 Originally Posted by 27offsuit This one is so awesome. I won't say what it is, but its funny. Let's see who gets it...
The dog one is very well done, the words one not as good. The better the image the faster it pops into 3D for me, and the dog one was near instant. I spend a lot of time looking at protein structures in stereo, so I'm pretty used to it.

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