| 基于差分变换和均值变换的线状要素的无损压缩 |
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| 引用本文： | 范民强,吴天君,洪刚,蒋明富.基于差分变换和均值变换的线状要素的无损压缩[J].测绘学院学报,2010(2). |
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| 作者姓名： | 范民强 吴天君 洪刚 蒋明富 |
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| 作者单位： | 信息工程大学测绘学院;郑州市住房保障与房地产管理局;78155部队; |
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| 摘 要： | 线状要素是地理信息系统、地形环境仿真的基础数据,其压缩优化的研究具有重要的现实意义。根据线状要素存储的结构特点和无损压缩算法的编码特点,利用差分变换和均值变换对线状要素的结构进行优化、调整,精简线状要素的存储空间,减少数据存储冗余,集中数据能量,然后运用通用LZW压缩算法对数据进行二次压缩,达到了较高的压缩率。
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| 关 键 词： | 线状要素 差分变换 均值变换 LZW压缩算法 数据结构 |
Lossless Compression to Linear Elements Based on Difference Transformation and Average Value Transformation |
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| FAN Min-qiang,WU Tian-jun,HONG Gang,JIANG Ming-fu.Lossless Compression to Linear Elements Based on Difference Transformation and Average Value Transformation[J].Journal of Institute of Surveying and Mapping,2010(2). |
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| Authors: | FAN Min-qiang WU Tian-jun HONG Gang JIANG Ming-fu |
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| Institution: | 1.Institute of Surveying and Mapping;Information Engineering University;Zhengzhou 450052;China2.The Housing Guaranteen and Real Estate Manage Bureau;Zhengzhou 450000;China;3.78155 Troops;Chendu 610036;China |
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| Abstract: | The compression optimization of linear elements plays an important role in terrain environment simulation and GIS researches etc.Based on the structural characteristics of linear elements storage and the coding characteristics of lossless compression algorithms,using differential transform and the mean transformation,the structure of linear elements was optimized,the storage space of linear elements was streamlined,data redundancy was reduced and data energy was centralized.Then LZW compression algorithm wa... |
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| Keywords: | linear element difference transformation average value transformation LZW compression algorithm data construction |
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