| 基于非均匀B样条曲面的DTM内插模型 |
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| 引用本文： | 朱长青,张真,江南,田岩. 基于非均匀B样条曲面的DTM内插模型[J]. 华中科技大学学报(自然科学版), 2006, 34(4): 45-48 |
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| 作者姓名： | 朱长青 张真 江南 田岩 |
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| 作者单位： | 中国科学院测量与地球物理研究所,湖北,武汉,430077;解放军信息工程大学,测绘学院,河南,郑州,450052;解放军信息工程大学,测绘学院,河南,郑州,450052;华中科技大学,电子与信息工程系,湖北,武汉,430074 |
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| 基金项目： | 科技部科研项目;中国科学院资助项目;国家科技攻关项目 |
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| 摘 要： | 对非均匀B样条曲面在数字地面模型(DTM)内插中的应用进行了研究,首先探讨了非均匀B样条曲面基本理论及其最小二乘解法,然后提出了基于非均匀B样条曲面的DTM内插算法,最后利用提出的B样条算法与目前一些常用的内插算法,对数学曲面与实际地形进行了试验和比较.试验结果表明B样条算法具有良好的精度和稳定性,能较好地改善在构建DTM时常出现的“梯田”现象.
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| 关 键 词： | 非均匀B样条 最小二乘 数字地面模型(DTM) 内插 误差 精度 |
| 文章编号： | 1671-4512(2006)04-0045-04 |
| 收稿时间： | 2005-04-22 |
| 修稿时间： | 2005-04-22 |
DTM interpolation model based on non-uniform B-splines |
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| Zhu Changqing,Zhang Zhen,Jiang Nan,Tian Yan. DTM interpolation model based on non-uniform B-splines[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2006, 34(4): 45-48 |
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| Authors: | Zhu Changqing Zhang Zhen Jiang Nan Tian Yan |
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| Abstract: | The application of non-uniform B-spline surface in the DTM interpolation is studied. The basic principle of non-uniform B-spline surface and its least squares solution were discussed, and the DTM interpolation algorithm based on non-uniform B-spline surface is established. The mathematical surfaces and the real terrain are experimented and analyzed using the developed B-spline algorithm and other interpolation algorithms. The experiments showed that B-spline algorithm with better precision and stability will better eliminate thorny terrace phenomenon which often happened in the DTM construction. |
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| Keywords: | non-uniform B-spline least squares digital terrain model(DTM) interpolation error accuracy |
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