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Actually, stereoscopic vision is overrated. There are many hits our brain uses to make the 3D model of the world we have on our minds. Stereoscopic vision is o

by aylons 13y ago

Actually, stereoscopic vision is overrated. There are many hits our brain uses to make the 3D model of the world we have on our minds. Stereoscopic vision is one of them, but really just kick in for objects nearer than you arm cam hold. For distant objects, our brain uses other hints - that's why people aiming at far objects close one of their eyes. One of the strongest is the parallax effect, specially for medium distance and relative distance between objects. If you doubt it, look at this video: http://www.youtube.com/watch?v=Jd3-eiid-Uw http://www.youtube.com/watch?v=Jd3-eiid-Uw Relative size and color fading works well for big distances - this is the prominent effect in parachuting videos. These are only two mecanisms, and immersion is not only about 3D sensation. Full periphery vision is of great value for this (IMAX, anyone?). Sound hints, brigthness, contrast, and a lot of other hints also help our brain making the 3D model.

jacobolus 13y ago
As you say, for far objects, stereoscopic vision doesn’t do much; however, that can be changed.. A really fun project I recommend anyone try is to make a sort of periscope for one eye [make one out of e.g a milk carton and a couple of rectangular mirrors, or some similar tube]. Leave one eye looking out normally, and make the other eye look through the periscope, aimed sideways. The result of this is to increase the effective distance between the two eyes from a couple inches to a foot or more (depending on your periscope). Now try looking at distant objects like a cityscape or some mountains. The stereo effect will be increased dramatically, and the whole scene will feel very dimensional and close.
- kirubakaran 13y ago
  So binoculars?
- aylons 13y ago
  No doubt you can induce the same effect in far objects by exaggerating the difference between what each eyes can see. If you didn't have the size to compare, you would actually think they are nearer. However, this is not very realistic - this is why sometimes the 3D effect in a movie vanishes or looks gimmicky. Until today, the most convincing 3D scene I ever saw were the recording in Avatar, which were recorded using a 3D camera very near to the face of the actor.

by aylons 13y ago

jacobolus 13y ago

As you say, for far objects, stereoscopic vision doesn’t do much; however, that can be changed.. A really fun project I recommend anyone try is to make a sort of periscope for one eye [make one out of e.g a milk carton and a couple of rectangular mirrors, or some similar tube]. Leave one eye looking out normally, and make the other eye look through the periscope, aimed sideways. The result of this is to increase the effective distance between the two eyes from a couple inches to a foot or more (depending on your periscope). Now try looking at distant objects like a cityscape or some mountains. The stereo effect will be increased dramatically, and the whole scene will feel very dimensional and close.

kirubakaran 13y ago
So binoculars?
aylons 13y ago
No doubt you can induce the same effect in far objects by exaggerating the difference between what each eyes can see. If you didn't have the size to compare, you would actually think they are nearer. However, this is not very realistic - this is why sometimes the 3D effect in a movie vanishes or looks gimmicky. Until today, the most convincing 3D scene I ever saw were the recording in Avatar, which were recorded using a 3D camera very near to the face of the actor.