Mutual conversion between 3D images and light rays
Keisuke Takeuchi, Takeshi Naemura, Hiroshi Harashima · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1998
In the field of 3-D image, several kinds of input/output methods are developed and still making rapid progress. Considering such situation, it is desirable that the format of 3-D data is independent on input/output methods. For this purpose, ray-based representation has been proposed. In this method, 3-D physical space is represented by rays which propagate in the space. If whole light rays are completely described, 3-D space can be reproduced correctly from light ray data. However, we can only obtain sample data of light rays, e.g. multiview images. Moreover, the parameters which represent the position and direction of light rays are also sampled. If the sampling of ray parameters is not proper, it is probable that original image are not reproduced correctly from the light rays. In this paper, we discuss the effects of the sampling in mutual conversion between multiview images and light rays. Furthermore, we present sampling methods to reproduce original images correctly for several camera arrangements.