You can use two normal cameras and two photographs to generate 3D view, just make sure that viewing conditions are such that one eye sees only one picture. There are many applications where binocular vision can be used to make 3D view. 3D can offer some amazing results, but has been plagued with various problems (each different 3D technology has their own limitations). Glasses-free will be the future of 3D technology, but for many years to come 3D glasses will be the mainstream way to view 3D because limitations of glass-free 3D technologies (usually require a specific viewing point to see the 3D image properly). When you want to produce 3D pictures/movies/TV you need to first shoot those two pictures like your eye sees them and then present them to your eyes. The brain then puts the two pictures together to form one 3D image that has depth to it. Since your eyes are about five to seven centimeters (two to three inches) apart, they see the same view from slightly different angles. This is done in the real world by your eyes being spaced apart so each eye has its own slightly different view. In order to see things in 3D each eye must see a slightly different picture. Mainstream TV, PC monitor, smartphone and games console makers have been jumping on the 3D bandwagon with the home to make money with it. 3D is is being pushed by display and film makers. Nowadays it is hard to hide from three-dimensional (3D) display technology.
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