DPReview.com is closing April 10th - Find out more

Stupid question: where does the illusion of 3D come from?

Started Jan 13, 2015 | Questions thread
threed123
threed123 Senior Member • Posts: 1,490
Re: Stupid question: where does the illusion of 3D come from?

Yes, the eye perceives lighter, more in focus parts of objects to be in the foreground, and dark fuzzy objects in the background. Also shadows add to the perception of roundness, and therefore depth. Objects below midway down an image are assumed to be closer to you as well, though in this case that doesn't make a difference. Different colors have different wavelengths and can also influence depth--and, no two people see the world the same way in 3D, and some not at all. There are algorithms for creating 3D from 2D that use all these perceptions and more. I had a friend who lost vision in one eye and could "see" in 3D by wiggling his head from side to side. His brain, in turn, would fuse the two images into 3D--so he said.

This article says it all, I think...

http://en.wikipedia.org/wiki/Depth_perception

selected answer This post was selected as the answer by the original poster.
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow