| 球面模型的逼近与数据压缩及推广 |
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| 引用本文： | 刘勇奎,李笑牛,云健.球面模型的逼近与数据压缩及推广[J].计算机工程与设计,2007,28(23):5680-5681,5794. |
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| 作者姓名： | 刘勇奎 李笑牛 云健 |
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| 作者单位： | 大连民族学院,计算机学院图形图像研究所,辽宁,大连,116600 |
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| 摘 要： | 提出了一种三维物体表面的逼近表示与数据压缩方法.该方法可以在不增加表示物体表面的数据量(例如面片数量)的情况下,使逼近误差降低约1/2;在逼近误差不变的情况下,使表示物体表面的数据量大幅下降.提出了用与最基本的三维物体--球体表面相交的面片来表示球面的方法,将该方法扩展到了一般曲面.理论分析与实验数据表明,新算法与传统方法相比,其数据压缩比约为35%.该研究在虚拟现实技术和三维模型的数据压缩及传输等领域有较重要的学术及应用价值.
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| 关 键 词： | 曲面 曲线 相交 逼近 压缩 面模型 逼近 数据压缩 extension surfaces spherical compression 价值 应用 学术 传输 三维模型 虚拟现实 研究 压缩比 算法 数据表 实验 分析 理论 |
| 文章编号： | 1000-7024（2007）23-5680-02 |
| 收稿时间： | 2006-12-17 |
| 修稿时间： | 2006年12月17 |
Approximation and compression of spherical surfaces and its extension |
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| LIU Yong-kui,LI Xiao-niu,YUN Jian.Approximation and compression of spherical surfaces and its extension[J].Computer Engineering and Design,2007,28(23):5680-5681,5794. |
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| Authors: | LIU Yong-kui LI Xiao-niu YUN Jian |
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| Abstract: | An algorithm for data compression and approximation of 3D model surfaces is presented. It can make the error in approximating the surface about 50% less without more data(e.g. the number of facets)required to express the surface, or make the data required to express the surface much less without changing the error. At first, an algorithm for approximating 3D spherical surfaces with surface- intersecting facets is presented. Then the process of developing this algorithm to approximate general curved surfaces is described. Theo- retical analysis and the experimental results show that the compression ratio of the new algorithm to the traditional ones is about 35%. The research has academic and practical values for data compression and transmission in the field of virtual reality and 3D modeling etc. |
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| Keywords: | surface curve intersection approximation compression |
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