Grant-in-Aid for Scientific Research (A)
|Research Institution||The University of Tokyo|
HARASHIMA Hiroshi The University of Tokyo, Interfaculty Initiative in Information Studies, Professor, 大学院・情報学環, 教授 (60011201)
KANEKO Masahide The University of Electro-Communications, Graduate School of Electro-Communications, Associate Professor, 大学院・電気通信学研究科, 助教授 (90262039)
NAEMURA Takeshi The University of Tokyo, Interfaculty Initiative in Information Studies, Lecturer, 大学院・情報学環, 講師 (90292896)
AIZAWA Kiyoharu The University of Tokyo, Graduate School of Frontier Sciences, Associate Professor, 大学院・新領域創成科学研究科, 助教授 (20192453)
|Project Fiscal Year
1998 – 2000
Completed(Fiscal Year 2000)
|Budget Amount *help
¥39,600,000 (Direct Cost : ¥39,600,000)
Fiscal Year 2000 : ¥7,000,000 (Direct Cost : ¥7,000,000)
Fiscal Year 1999 : ¥13,900,000 (Direct Cost : ¥13,900,000)
Fiscal Year 1998 : ¥18,700,000 (Direct Cost : ¥18,700,000)
|Keywords||Ray-based representation / 3-D Space / Shared-Space Communication / 3-D Space Coding / Spatial Sampling / Virtual Object Surface / Reflection-Based Interface / 光線記述 / 3次元空間 / 空間共有通信 / 3次元空間符号化 / 空間情報サンプリング / 仮想オブジェクト面 / 鏡面インタフェイス / 冗長圧縮符号化|
The aim of this research is to revolutionize communication systems from the 2-D image communication " used widely nowadays to the "Integrated 3-D Visual Communication" that should allow us to share the 3-D space itself. Especially, we pointed out the large number of technical problems for this dream systematically and gave basic investigations of each topic.
1.Discussion on the Future of the Integrated 3-D Visual Communication and Study on Technical Difficulties in 3-D Image Coding
We gathered and investigated the information from both Japan and foreign countries related to the present 3-D imaging technologies and the future image communication systems. We also categorized several research topics in 3-D image coding.
2.Theoretical Systematization of the Ray-Based Representation Method for 3-D Spatial Data
Systematically, we clarified the relationship between conventional "Image" processing techniques and processing techniques for "light ray data". Furthermore, we proposed some methods for
mutual conversion between light ray data and several visual data aiming to realize the comprehensive visual communication systems.
3.Investigation on Efficient Methods for Sampling 3-D Spatial Data
A system that can take (capture) samples of light ray data was constructed. Moreover, we examined how to sample the data efficiently by introducing a method for measuring 3-D shape. We also constructed a system that captures a set of orthogonal views and studied its applicability to the Integrated 3-D Visual Communication, experimentally.
4.Study on Statistical Approach to Compressing the Large Amount of Light Ray Data
We studied how the 2-D image compression methods such as motion compensation and discrete cosine transformation are effective for data compression of light rays. According to this study, a segmentation method for representing light ray data in a structural way was examined.
5.Proposal form Human Interface Techniques in Immersive Projection Systems
We proposed and implemented the concept of Reflection-Based Interface and Virtual Light Interaction as human interface techniques for merging the real and virtual worlds seamlessly. Less