| 虚拟地形建模中地物与地形匹配的算法研究 |
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| 引用本文： | 刘宁,许敏.虚拟地形建模中地物与地形匹配的算法研究[J].测绘学院学报,2004,21(3):215-218,221. |
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| 作者姓名： | 刘宁 许敏 |
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| 作者单位： | 信息工程大学 测绘学院，信息工程大学 测绘学院 河南 郑州 450052，河南 郑州 450052 |
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| 摘 要： | 对于大比例尺条件下的地形环境仿真而言，采用贴2维纹理的方式表示地物已远远不能满足定位精度和可视化效果的需要，因为每个地物都是一个清晰可辨的3维实体了。在这种情况下地物模型能否与地形模型相匹配(即虚拟场景中的地物既不悬于地表之上也不陷入地表之下)将直接关系到视觉感受的逼真程度，以及在虚拟场景中对目标实施打击的精确程度。文中就如何实现地物模型与地形模型在数据层次上的匹配提出了一个解决方案，并对具体算法进行了详细阐述。实验结果表明了算法的正确性和实用性，由此说明匹配方案较为行之有效。
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| 关 键 词： | 大比例尺 地物模型 地形模型 匹配算法 |
On a Matching Algorithm Between Ground Feature and Terrain in Virtual Terrain Modeling |
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| LIU Ming,XU Min.On a Matching Algorithm Between Ground Feature and Terrain in Virtual Terrain Modeling[J].Journal of Institute of Surveying and Mapping,2004,21(3):215-218,221. |
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| Authors: | LIU Ming XU Min |
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| Abstract: | For terrain environment simulation of large scale, texture-mapping to express ground features has not met the needs of precise positioning and visualization because each ground feature now is a 3D object. So, if the ground feature model and the terrain model cannot match with each other, we could not feel the verisimilitude of the virtual terrain environment and the precision of hitting target will be debased. This paper advances a scheme to resolve the problems and expatiates the key arithmetic. Based on experiments we can say that the arithmetic is practical and correct, and the scheme is effective. |
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| Keywords: | large scale ground feature model terrain model matching arithmetic |
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