The reason that close objects don't match CG objects is the physical
dimension of the camera lens which is not a pin hole like the the CG
"lens". When objects are closer than, let's say, 10*lens_diameter,
the difference becomes more apparent. There was an article in IEEE
CG&A where real camera lens geometry was modelled thus providing a
perfect match with a corresponding photograph.

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Kari Kivisalo                                  http://www.kivisalo.net

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