High-efficiency acquisition of ray-space using radon transform
Keiji Yamashita, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2010
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.