Mutual conversion between 3D images and light rays
Mutual conversion between 3D images and light rays
复制标题
3D图像与光线的相互转换
DOI：
10.1117/12.334643
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
H. Harashima
中科院分区：
文献类型：
--
作者：
Keisuke Takeuchi;T. Naemura;H. Harashima
在3D图像领域，多种输入/输出方法被开发出来并且仍在快速进展。考虑到这种情况，希望3D数据的格式独立于输入/输出方法。为此，提出了基于射线的表示。在此方法中，3D 物理空间由在空间中传播的射线表示。如果完整地描述了整个光线，则可以从光线数据正确地再现 3D 空间。然而，我们只能获得光线的样本数据，例如多视图图像。此外，还对表示光线位置和方向的参数进行采样。如果光线参数的采样不正确，则很可能无法从光线中正确地再现原始图像。本文讨论了采样对多视图图像与光线相互转换的影响。此外，我们提出了采样方法，可以为几种相机布置正确地再现原始图像。
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.