The shaking is what created the illusion of depth. A person sees depth by three different mechanisms: triangulation, focus, and parallax.
Triangulation is the primary method - the closer something is to you the more your eyes cross to both point at it. Traditional 3-D pictures where you use a viewer or glasses use triangulation - one eye centres on one image and other eye on the other. Close or cover one eye and this stops working.
You brain is also aware of how much the lens in your eye is contracting. For things less than about 3 metres away you can still relatively accurately guage distances even with one eye covered and you head still just by what it takes to bring the object into focus.
The last one, parallax, is what is happening here. If you cover one eye and try to gauge the distance of things more than a couple metres away you'll find that to do it you will do it by rocking your head from side to side. Things that are closer to where you are "move" more than things further away, and things in front of what you are looking at will "move" in opposition to things behind it. That's what is going on in the picture - it simulates you moving your head from side to side.
Funny thing about all this is, I'm partially blind in one eye so I don't have the binocular vision to use triangulation, and I am extremely nearsited so my range of focus is limited. Parallax is the *only* way I see depth in the real world. These shakey pictures are the only 2-D representation of 3-D that I've ever been able to see.
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Date: 2006-03-12 04:04 pm (UTC)no subject
Date: 2006-03-12 08:47 pm (UTC)Triangulation is the primary method - the closer something is to you the more your eyes cross to both point at it. Traditional 3-D pictures where you use a viewer or glasses use triangulation - one eye centres on one image and other eye on the other. Close or cover one eye and this stops working.
You brain is also aware of how much the lens in your eye is contracting. For things less than about 3 metres away you can still relatively accurately guage distances even with one eye covered and you head still just by what it takes to bring the object into focus.
The last one, parallax, is what is happening here. If you cover one eye and try to gauge the distance of things more than a couple metres away you'll find that to do it you will do it by rocking your head from side to side. Things that are closer to where you are "move" more than things further away, and things in front of what you are looking at will "move" in opposition to things behind it. That's what is going on in the picture - it simulates you moving your head from side to side.
Funny thing about all this is, I'm partially blind in one eye so I don't have the binocular vision to use triangulation, and I am extremely nearsited so my range of focus is limited. Parallax is the *only* way I see depth in the real world. These shakey pictures are the only 2-D representation of 3-D that I've ever been able to see.