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Dr Vishwanath said: "We have demonstrated experimentally, for the first time, that the same 'special way' in which depth is experienced in 3D movies can also be experienced by looking at a normal picture with one eye viewing through a small aperture (circular hole).
"While this effect has been known for a long time, it is usually dismissed.
"Now we have shown that it is in fact real, and the perceptual results are exactly like stereoscopic 3D, the kind seen in 3D movies.
originally posted by: Caver78
a reply to: wildespace
If the round rock wasn't a lighter shade than the background the illusion probably wouldn't work. Speaking from experience ( I only have one eye) I can assure you I don't see the world in 3-d......LOL!!!
It's taken me almost 3 yrs for my brain to compensate.
Beautiful picture tho!!
Where was it taken?
originally posted by: chopperswolf
Glad to meet another pirate , high curbs and hitting the trash can from across the room still gives me trouble, and shooting a bow sucks if yardage isn't marked out. I still don't see the ops pic in 3 d, it looks flat to me. a reply to: Caver78
Depending on whom you ask, it affects somewhere between 3 and 15 percent of the world's population, which creates an interesting demographic hurdle for the 3D television industry. Some people are stereoblind because their vision in one eye is severely impaired, others because their brains are unable to coalesce images from both eyes into a three-dimensional result.
If the position of your head is fixed, then of course you need two eyes to judge distance using stereo vision but it only works to a certain distance, probably around 30 meters away for most people. Beyond about 30 meters the difference seen by the two eyes doesn't have sufficient resolution for depth perception, and we use other cues, which are spelled out in the link you posted.
originally posted by: jonnywhite
So does this mean the old idea that we need two eyes to triangulate positions of things is bunk? Or does it mean something else?
It's quite likely that some people can get depth perception with one eye using this method, but probably not everybody can as it takes processing skills which may not be built-in for everybody. But basically what you're saying is put your one eye in the position of a left eye then move it so it's in the position of the right eye, and from these two perspectives you have the same information that a person with two eyes has, so it all boils down to how effectively you can process this information, a skill that probably varies from person to person, which in fact even people with two eyes have varying skill levels in discerning depth.
originally posted by: rickymouse
Now, when we look through one eye we will either move our head or move our eye a little to establish needed motion which the mind can generate depth perception from. We are not usually aware we are doing this, we have done it all of our life so it is automatic. Just because we do not know we are doing it does not mean we aren't.
For all practical purposes related to human stereo vision, the distance to the moon is "infinity" meaning both eyes should see the same thing. As I said earlier, depth perception using the resolution of human eyes spaced a normal distance apart probably isn't effective beyond much over 30 meters, and the moon is way over 30 meters away.
The image we see of the moon does not look like what most of us see, we center the image and it makes a nice sharp moon.