16 May 2018 Ray-space processing for omnidirectional FTV
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Abstract
FTV (Free-viewpoint Television) enables users to view a 3D scene by freely changing the viewpoint as if they were actually there. FTV is developed based on ray-space representation. Omnidirectional FTV is an FTV with very wide field of view (FOV), that is 360-degree FOV. 4D spherical ray-space is analyzed and applied to omnidirectional FTV. 4D spherical ray-space of “a group of rays through one point” is derived. It is extended to ray-space captured by many cameras on a circle. View generation of omnidirectional FTV needs rays that are not captured by real cameras. These rays are synthesized by interpolating the captured ray-space. It is done so that the intersections of the captured ray-space and the ray-space of rays emitted from a light source have the same color. Omnidirectional FTV with full parallax is realized by using the 4D ray-space processing.
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Masayuki Tanimoto, Hirokuni Kurokawa, "Ray-space processing for omnidirectional FTV", Proc. SPIE 10666, Three-Dimensional Imaging, Visualization, and Display 2018, 1066607 (16 May 2018); doi: 10.1117/12.2304605; https://doi.org/10.1117/12.2304605
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