CASIA OpenIR  > 毕业生  > 硕士学位论文
Thesis Advisor张胜
Degree Grantor中国科学院自动化研究所
Place of Conferral中国科学院自动化研究所
Degree Discipline控制理论与控制工程
Keyword网络虚拟环境 虚拟人 人体建模 人体运动 人体变形 Neworked Enviroment Virtual Human Human Modeling Human Motion Human Deformation
Abstract网络化、分布式的虚拟环境是当前虚拟现实技术的一个主要研究发展方向, 也是一项国家“九五”重点攻关课题,而虚拟人运动的实现是其中的一项重要 研究内容。本文对虚拟人的建模,运动仿真,人体的变形处理等一些问题进行 了理论上的探讨,并设计了实际应用中的解决方案。 本文首先介绍了一种以PC为工作平台的分布式虚拟现实环境系统的软、硬 件结构和设计思想,对分布式虚拟环境系统的特点、功能、设计要求和应用的 前景进行了分析和总结。该系统实现了虚拟环境的交互式管理,能够完成对虚 拟人的运动仿真,并对当前正在研制开发的新型传感器的潜在应用提供了支持。 接着,本文提出了一种虚拟人建模的方法和在分布式的虚拟环境下实现运 动描述数据异地传输的解决方案。文中对人体关节结构进行了详细分析,并在 此基础上确定了虚拟人的运动模型。同时,对如何由不同的几何模型构造出标 准的运动模型给出了完整的处理方法。针对系统的开放性和可重用性的要求, 该方法力求做到了对不同类型的人体几何模型,能够自动生成符合用户特定要 求的人体运动模型,并顺利实现人体运动仿真所必需的控制功能。在实现了人 体的完整建模后,本文又对人体关节运动所引起的表面变形问题进行了讨论, 并进而提出了一种网格点偏移的人体变形处理方法。该方法将人体几何模型的 网格点进行划分,对其中的变形部分的各点进行了程度不同的拉伸,以保证人 体变形时人体表面连续性和视觉效果上的真实性。我们通过实验对以上方法进 行了验证,结果表明该方法完全满足实时处理的要求。
Other AbstractThe realization of the Virtual Humen's motion is one of the important problems in Networked or Distributed Virtual Environment which is a main trendency in current VR research, and also an National Ninth Five-year Plan Key Project. In this thesis, we discussed in theory about some problems such as Virtual Human Modeling, Motion Simulation, Deformation of Human Body and so on, and propose the scheme of solution. Firstly, this thesis describes the structures of hardware and software, and the idea on which they based of a Distributed Virtual Environment(DVE) system, which based on the PC platform, analyses and summarizes the DVE's characteristic, function , designing method and it applications. This system realizes the interactive managerment of Virtual Environment, fulfills the simulation of Human Motion and supports the new transducer currently developed in our lab. Nextly, this thesis presents a method of Virtual Human's Modeling and the implementation of how to transmit the Motion Descript Data between different places in DVE. After the detailed analysis of the structure of human body's skeleton, we determaine the format of it's motion model. And we also propose a kind of method by which standard motion model can be constructed from different kind of geometry models. For the purpose of the system's openness and reusability, this method can generate the human motion model specified by users in spite of the difference of the geometry models, and can realize the controlling functions of the simulation of Human Motion easily. After the description of this method, we discuss another question:Human Deformation, and give a vertices offsetting method to solve this question. In this method, each part of human body is divide into deformable part and undeformable part, the vertices on the deformable part will be moved with different offset, which is determained by the distance of the vertices to the boundary of this part, by using this method, the continuity of the surface of human body and the realism of vision effect are guaranteed. Experiments demonstrate that the mehtods described above are effective to meet the requirement of real-time processing.
Other Identifier583
Document Type学位论文
Recommended Citation
GB/T 7714
张胜. 虚拟环境中的虚拟人建模与运动仿真技术的研究[D]. 中国科学院自动化研究所. 中国科学院自动化研究所,2000.
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