| 基于Cardinal的虚拟场景自动漫游算法 |
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| 引用本文： | 罗立宏,张群英,冯开平,左宗义. 基于Cardinal的虚拟场景自动漫游算法[J]. 桂林工学院学报, 2007, 27(2): 278-281 |
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| 作者姓名： | 罗立宏 张群英 冯开平 左宗义 |
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| 作者单位： | 1. 广东工业大学,数字媒体系,广州,510090
2. 桂林工学院,电子与计算机系,广西,桂林,541004 |
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| 基金项目： | 科技部国际合作项目(AM30∶023(30-50)) |
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| 摘 要： | 对于虚拟场景自动漫游功能,存在改进的折线法和Hermite样条插值法,这两种方法都不能彻底消除漫游中摄像机抖动的现象.为了彻底克服抖动,提出以Cardinal样条插值算法为基础的新方法:先用Cardinal插值计算出足够密的曲线点,再根据这些点在曲线上筛选等弧长的点,并用文件储存.在自动漫游的时候再根据等弧长的点和漫游速度切换摄像机.对于网络的应用,可用XML格式储存.基于Cardinal的方法可以彻底克服摄像机的抖动,使漫游曲线非常平滑.给出了一个Web应用的实例.
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| 关 键 词： | 虚拟现实 自动漫游 算法 Cardinal样条 插值 |
| 文章编号： | 1006-544X（2007）02-0278-04 |
| 修稿时间： | 2006-09-21 |
Automatic Touring Algorithm in Virtual Scene Based Cardinal |
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| LUO Li-hong,ZHANG Qun-ying,FENG Kai-ping,ZUO Zong-yi. Automatic Touring Algorithm in Virtual Scene Based Cardinal[J]. Journal of Guilin University of Technology, 2007, 27(2): 278-281 |
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| Authors: | LUO Li-hong ZHANG Qun-ying FENG Kai-ping ZUO Zong-yi |
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| Affiliation: | 1. Department of Digital Media, Guangdong University of Technology, Guangzhou 510090, China; 2. Department of Electronics and Computer Science, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | Improved multiline and Hermite spline methods are used for auto-touring in virtual scene.But in the two methods camera shake can't be avoided completely during touring.In order to overcome camera shaking,a new method based on Cardinal spline is found by calculating curve points that are very dense in Cardinal inserting method,and selecting points with equal arc length from curve points.In touring,camera can be switched according to the equal arc length points and tour velocity.XML may be used in Web application.Methods based on Cardinal can overcome camera shaking completely with smooth touring curve.An instance of Web application is presented on internet. |
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| Keywords: | virtual reality auto-tour algorithm Cardinal spline interpolation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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