| 压缩矢量图形的两个算法的比较和分析 |
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| 引用本文： | 喻国宝,廖湖声,郑玉明.压缩矢量图形的两个算法的比较和分析[J].计算机工程与应用,2005,41(1):80-81,209. |
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| 作者姓名： | 喻国宝 廖湖声 郑玉明 |
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| 作者单位： | 北京工业大学计算机学院,北京,100022;北京工业大学计算机学院,北京,100022;北京工业大学计算机学院,北京,100022 |
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| 基金项目： | 北京市教委科技发展基金(编号:KM200410005005)，北京市优秀人才培养专项经费资助 |
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| 摘 要： | 文章在介绍矢量图形压缩的意义后,分别介绍了矢量图形压缩的分治算法和线性算法,并对这两个算法进行了分析和比较。在选取适当的控制数据压缩的阈值后,分治算法和线性算法的压缩效果接近,但线性算法所需存储空间比分治算法的少,而且线性算法的时间复杂度从分治算法的O(nlogn)降低到O(n)。
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| 关 键 词： | 地理信息系统 矢量图形压缩 算法分析 |
| 文章编号： | 1002-8331-(2005)01-0080-02 |
Comparison and Analysis of Two Compact Algorithms for Vector Graph |
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| Yu Guobao,Liao Husheng,Zheng Yuming.Comparison and Analysis of Two Compact Algorithms for Vector Graph[J].Computer Engineering and Applications,2005,41(1):80-81,209. |
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| Authors: | Yu Guobao Liao Husheng Zheng Yuming |
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| Abstract: | After introducing the purpose of vector graph compact,a Divide-and-Conquer algorithm and a linear algorithm for vector graph compact are described in this paper.Comparison and analysis are also discussed,revealing that the linear algorithm has approximate same effectiveness as the Divide-and-Conquer algorithm but the linear algorithm has the time complexity of O(n) whereas the Divide-and-Conquer algorithm has the time complexity of O(nlogn).Moreover,the linear algorithm needs less memory than the Divide-and-Conquer algorithm. |
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| Keywords: | Geographic Information Systems vector graph compact algorithm analysis |
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