计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (27): 26-27.

• 博士论坛 • 上一篇    下一篇

基于扫描线的等高线树生成法

孟 亮,方金云   

  1. 中国科学院 计算所,北京 100080
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-21 发布日期:2007-09-21
  • 通讯作者: 孟 亮

Scan-line based contour tree generation method

MENG Liang,FANG Jin-yun   

  1. Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100080,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-21 Published:2007-09-21
  • Contact: MENG Liang

摘要: 等高线树在地图的产生、地形分析等应用中具有较重要的应用。对于产生等高线树,提出了一种基于扫描线的方法,该方法把扫描线和等高线之间的交点对解释为区域,利用区域之间的包含关系对应等高线之间的包含关系,以这种方式来确定父等高线与子等高线之间的“一对多”直接包含关系。与其他方法相比,该方法较容易理解与实现,且执行速度较快。

关键词: 等高线树, 等高线空间关系, 扫描线

Abstract: A contour tree has found many important applications in map generalization,terrain analysis,etc.with respect to generating contour tree,this paper has proposed a scan-line based method,this method translates intersection point pair of scan-line and contour line as range,explains containment relation between range as containment relation between contour lines,determines “one-many” direct containment relations between parent contour and child contour by this method.Compared with other methods,this method has the advantage of easy understanding and realization,has quick execution speed.

Key words: contour tree, spatial relations of contour lines, scan line