The four-camera setup is already in use
When it comes to producing 3D TV content, the more cameras that are used to simultaneously record one shot, the better.
At least two cameras (or one camera with two lenses) are necessary to provide the depth information needed to produce the left- and right-eye images for conventional 3D, but according to researchers at Germany’s Fraunhofer Institute for Telecommunications, at least four cameras will be needed if we ever want to achieve glasses-free 3D TV. Calibrating that many cameras to one another could ordinarily take days, however … which is why Fraunhofer has developed a system that reportedly cuts that time down to 30 to 60 minutes.
The STAN assistance system ensures that the optical axes, focal lengths and focal points are the same for each camera. That way, as the viewer moves their head, the combined shots will all look like one three-dimensional shot.
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