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Old 2019-07-02, 15:40   #7
chris2be8
 
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Sep 2009

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Quote:
Originally Posted by jasong View Post
I'm certainly not an expert, but if you think about it, everything you see is a 2-d image, a spherical image that impinges on your eyeball.
Most people have two eyes, and comparing the images lets you estimate how far away things are by parallax. And seeing how the image changes as you move relative to the scene lets you estimate 3D shapes as well.

A photograph is just one 2D image, so you have a lot more ambiguity to worry about.

Chris
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