Integrated 3-D Visual Communication as the Next Generation Information Environment

这一开创性的项目旨在实现综合三维视觉通信作为下一代信息环境。本课题的研究成果如下：1.综合三维视觉交流的提出鉴于目前许多三维图像处理的工作都是专门针对相应的三维显示技术的，我们提出了一种新的概念--综合三维视觉交流，即任何一种三维图像都可以用同样的方式来表示。我们还指出了实现这种显示无关表示所必须解决的一些技术问题。3-D图像表示我们研究了“基于光线”的3-D图像表示方法，该方法对任何类型的输入系统都是中立的。对平面表示法、柱面表示法、球面表示法等三种方法进行了阐述和比较。3-D图像的采样由于2-D图像可以被视为一组光线，因此我们可以将捕获2-D图像的过程看作是对光线数据进行采样的过程。从这个角度出发，我们提出了一种利用计算机控制的摄像机架对三维空间数据进行采样的新方法。我们还研究了一种从三维图像中估计摄像机参数的方法。三维图像的压缩我们提出了一种用于光线数据压缩的多维DCT(离散余弦变换)方法。在该方法中，可以对三维图像进行实时解码。因此，我们可以利用该方法开发一些交互式应用程序。3-D图像的结构化我们提出了几种3-D图像的结构化方法。一种是基于三维图像输入的结构恢复方法，另一种是基于光线数据结构化的新概念。显示3D图像我们研究了如何在身临其境的虚拟环境中显示3D图像。

This pioneering project is aiming to realize the Integrated 3-D Visual Communication as the next-generation information environment. The results of the project are as follows :1. Proposal of the Integrated 3-D Visual CommunicationSince many works on 3-D image processing have been specialized just for the corresponding 3-D display technologies, we proposed a novel concept of the "Integrated 3-D Visual Communication", in which any kind of 3-D image is represented in the same way. We also pointed out some technological problems which must be solved for the realization of this display-independent representation.2. Representing 3-D ImagesWe investigated the "Ray-Based" method for representing 3-D images, which is neutral for any kind of input system. We also formulated and compared three methods, such as planer, cylindrical and spherical representation.3. Sampling of 3-D ImagesSince a 2-D image can be regarded as a set of light rays, we can see the process of capturing 2-D images as that of sampling light ray data. From this point of view, we proposed a novel method for sampling 3-D spatial data using computer-controlled camera gantry. We also investigated a method for estimating camera parameters from 3-D images.4. Compression of 3-D ImagesWe proposed a multi-dimensional DCT (discrete cosine transform) method for the compression of light ray data. In the proposed method, 3-D images can be decoded in real time. So we can develop some interactive applications by the method.5. Structurization of 3-D ImagesWe proposed some methods for structurizing 3-D images. One is the structure recovery method from 3-D image input, and another is based on the novel concept of structurization of light ray data.6. Displaying 3-D ImagesWe investigated how to display 3-D images in an immersive virtual environment.