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5 May 2010 High-efficiency acquisition of ray-space using radon transform
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In this paper, we propose a method for high efficiency acquisition of Ray-Space for FTV (Free viewpoint TV). In this research, incomplete data is directly captured by a novel device, i.e. photodiode/lens array, and transformed to full information by Radon transform. We must capture the large amount of data in conventional acquisition of Ray-Space using multiple cameras. However Ray-space has redundancy because it consists of set of lines which depend on depth of objects. We use the Radon transform to exploit this redundancy. The Radon transform is set of projection data along different directions. Thus Ray-space can be reconstructed from projection data in limited range by the inverse Radon transform. Capturing the part of projection data correspond to capturing sums of several rays by 1 pixel. We have simulated reconstruction of Ray-space projection data which was computed by computer simulation of capturing device. As a result, by using fewer pixels than rays, we could reduce the information to reconstruct Ray-space.
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Keiji Yamashita, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto "High-efficiency acquisition of ray-space using radon transform", Proc. SPIE 7690, Three-Dimensional Imaging, Visualization, and Display 2010 and Display Technologies and Applications for Defense, Security, and Avionics IV, 76900K (5 May 2010);

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