| 三维显示中的DTM数据简化算法 |
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| 引用本文： | 刘玮,沈邦乐,罗睿,刘建华.三维显示中的DTM数据简化算法[J].测绘学院学报,1999(1). |
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| 作者姓名： | 刘玮 沈邦乐 罗睿 刘建华 |
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| 作者单位： | 解放军测绘学院!郑州450052 |
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| 摘 要： | 提出了一种将图形生成技术与图像处理相结合,对DTM数据进行最优三角划分的简化DTM数据的算法。依据一定的分辨率条件,将DTM数据转化到二维图像空间,找到它的局部特征点,并将二维空间的特征点利用Delaunay剖分三角化,再映射到三维空间,从而在简化数据的同时,得到一个满足保真性要求的TIN模型。最后实验验证了算法的有效性。
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| 关 键 词： | TM 三维图形简化 Delaunay三角剖分 TIN |
An Algorithm for DTM Reduction in 3 D Visualization |
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| Liu Wei,Shen Bangle,Luo Rui,Liu Jianhua.An Algorithm for DTM Reduction in 3 D Visualization[J].Journal of Institute of Surveying and Mapping,1999(1). |
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| Authors: | Liu Wei Shen Bangle Luo Rui Liu Jianhua |
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| Institution: | Liu Wei Shen Bangle Luo Rui Liu Jianhua |
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| Abstract: | A Delaunay strategy based algorithm combined the technology of both graphics and image process for DTM reduction was proposed in this paper. According a certain resolution requirement, DTM data were projected to 2D image space and it's local feature points were detected. Then the local feature points were triangulated by Delaunay method and projected back to 3D space, therefore, a TIN model which met the need of quality was got and the DTM data were reduced. The validity of the algorithm was proved by the experiments at last. |
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| Keywords: | DTM 3D graphic reduction Delaunay triangulation Triangulated irregular network |
| 本文献已被 CNKI 等数据库收录！ |
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