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The Magic Cafe Forum Index » » Seeing is believing » » Faux Stereo Vision (0 Likes) Printer Friendly Version

dduane
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Special user
Bridgewater, MA
720 Posts

Profile of dduane
Hi,

Has anyone tried this...??
At the movies - or close up to a large-screen TV - try this:
Close one eye, and repeat to youself "this is real - this is real - ....". In about 30 to 60 seconds the images become like 3D. It's quite surprizing, especially when you may think that 3D is only caused by the 2 angles of stereo vision. I've never read anything on this, but I'm sure it's not a new discovery.
What happens is the brain can't confirm that the image is flat, unless it can see with both eyes - so it's not sure. By pretending that it is real, the brain tries to make it look like 3D. In scenes that have distance or depth it works pretty well, especially if there is motion...
Jonathan Townsend
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Eternal Order
Ossining, NY
27028 Posts

Profile of Jonathan Townsend
Check out what happens when you impede your dominant eye by using a tinted lens or even a sheet of plastic - Smile The phenomenon has a name and some exercises can teach one to get that same effect without the glasses.
...to all the coins I've dropped here
TomasB
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Inner circle
Sweden
1143 Posts

Profile of TomasB
Squint your left eye (or put sun glasses just over the left eye) and move the mouse pointer leftward over the Magic Café Logo above. It will seem to float above it. Move it to the right and it will sink into the screen instead.

The squinting eye will percieve scenes a fraction of a second later than the right eye so that the eyes need to rotate towards eachother to simultaneously percieve an object moving to the left. Incidentally, having to rotate the eyes towards eachother is the way our brain tells us that the object is closer.

If the object is moving to the right and the left eye is seeing the scene a bit later than the right eye, the eyes have to rotate outwards and that's why the object seems to be further away.

If you look like this at a pendulum swinging back and forth you will swear that it's going in a circle.

I also suggest trying it while watching TV. If the camera pans to the right in a scene, squint your left eye. If the camera is moving to the left, squint your right eye.

In case it's too straining to squint you can put your index and thumb tips together and place in front of your eye, but just a bit off centre so you still can see the TV with that eye. It darkens the view enough to work. Try it with the mouse pointer over the logo.

/Tomas
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