| 基于小波分析的DEM数据多分辨率表达研究 |
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| 引用本文： | 黄为,魏迎梅,宋汉辰,吴玲达.基于小波分析的DEM数据多分辨率表达研究[J].计算机仿真,2010,27(5):80-83. |
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| 作者姓名： | 黄为 魏迎梅 宋汉辰 吴玲达 |
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| 作者单位： | 国防科技大学信息系统与管理学院,湖南,长沙,410073 |
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| 摘 要： | 在研究三维地形的数字模型中,针对现有DEM数据的多分辨率模型构建中存在的问题,为提高精度,减少失真,结合DEM数据的特点,提出了一种简化的基于小波的DEM数据多分辨率表达算法,通过改变多分辨率分解时高频信号的获取方式,使得DEM数据的多分辨率重构可以以一种相对简单的方式进行,从而使得多分辨率模型的重构效率得到了较大的提高。分析了由于分块小波变换而带来的边界失真问题,并根据滤波器系数的长度不同,提出了相应的解决方法,经试验证明重构效果有较大的提升。
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| 关 键 词： | 数字高程模型 多分辨率模型 小波分析 |
Multi-Resolution Representation of DEM Based on Wavelet Analysis |
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| HUANG Wei,WEI Ying-mei,SONG Han-chen,WU Ling-da.Multi-Resolution Representation of DEM Based on Wavelet Analysis[J].Computer Simulation,2010,27(5):80-83. |
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| Authors: | HUANG Wei WEI Ying-mei SONG Han-chen WU Ling-da |
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| Affiliation: | College of Information System and Management/a>;National University of Defense Technology/a>;Changsha Hunan 410073/a>;China |
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| Abstract: | According to the characteristic of DEM data,this paper presents a method for multi-resolution representation based on wavelet analysis to overcome the drawbacks of the general multi-resolution models.In order to improve the efficiency of DEM reconstruction,this paper gives a new way to obtain the coefficient of high frequency during wavelet decomposition,which can simplify the algorithm of wavelet reconstruction.Then the paper analyzes the boundary problem caused by block wavelet transform which will inevit... |
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| Keywords: | DEM Multi-resolution model Wavelet analysis |
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