基于Voronoi图的遥感影像校正地面控制点选取  

The Selection of Ground Control Points in a Remote Sensing Image Correction Based on Voronoi Diagram

作　　者：周家香[1] 朱晓东[1] 周晓光[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《地理信息世界》2007年第2期67-70,共4页Geomatics World

基　　金：国家自然科学基金项目资助(40301042);湖南省科技计划项目资助(2004022200611)

摘　　要：遥感影像几何校正时要求选取的地面控制点应尽可能在整幅影像内均匀分布,而对于均匀分布的理解主观性较强。本文运用Voronoi图控制地面控制点的均匀分布,并建立了控制点的分布与数量的联系,使选取的地面控制点分布均匀,且数量足够。实验证明,用Voronoi图控制地面控制点的均匀分布,是提高遥感影像多项式几何校正精度的有效途径。In remote sensing image geometric correction, the ground control points （GCPs） to be selected are required to distribute evenly in full image scenes, which is often a subjective description in practice. For this purpose, this paper proposes to use Voronoi diagram as an assistant tool to select GCPs, and builds the relationship between GCPs distrbution and their number. It has been proved by an example that using Voronoi diagram to control GCPs distribution is an effective method for improving the precision of geometric correction.

关 键 词：地面控制点 几何校正 VORONOI图 遥感影像 

分 类 号：TP251[自动化与计算机技术—检测技术与自动化装置]