| DEM Compression Based on Integer Wavelet Transform |
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| 作者姓名： | CHEN Renxi LI Xinhui |
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| 作者单位： | CHEN Renxi LI Xinhui CHEN Renxi，Department of Surveying and Mapping Engineering，College of Civil Engineering，Hohai University，1 Xikang Road，Nanjing 210098，China. |
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| 摘 要： | DEM data is an important component of spatial database in GIS. The data volume is so huge that compression is necessary. Wavelet transform has many advantages and has become a trend in data compression. Considering the simplicity and high efficiency of the compression system, integer wavelet transform is applied to DEM and a simple coding algorithm with high efficiency is introduced. Experiments on a variety of DEM are carried out and some useful rules are presented at the end of this paper.
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| 关 键 词： | 数值型小波变换 DEM 数据压缩 GIS |
| 文章编号： | 1009-5020（2007）02-133-04 |
| 收稿时间： | 19 March 2007 |
| 修稿时间： | 2007-03-19 |
DEM compression based on integer wavelet transform |
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| CHEN Renxi LI Xinhui.DEM Compression Based on Integer Wavelet Transform[J].Geo-Spatial Information Science,2007,10(2):133-136. |
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| Authors: | Renxi Chen Xinhui Li |
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| Institution: | (1) Department of Surveying and Mapping Engineering, College of Civil Engineering, Hohai University, 1 Xikang Road, Nanjing, 210098, China |
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| Abstract: | DEM data is an important component of spatial database in GIS. The data volume is so huge that compression is necessary. Wavelet transform has many advantages and has become a trend in data compression. Considering the simplicity and high efficiency of the compression system, integer wavelet transform is applied to DEM and a simple coding algorithm with high efficiency is introduced. Experiments on a variety of DEM are carried out and some useful rules are presented at the end of this paper. |
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| Keywords: | DEM wavelet transform data compression |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
