摘要
利用LandSat 7ETM+影像快速更新1∶25万地形图是一种行之有效的方法,为达到地形图更新的目的,必须提高影像的判读效果。文中在介绍几种常用融合算法的基础上,提出了一种较为简单的加权平均融合算法,并对几种常用融合方法进行了比较研究,最后利用联合熵和平均梯度对融合结果进行了客观评估。
It is an effective method using LandSat-7 ETM+ image to update 1∶250 000 topographic map rapidly. In order to improve the effect of interpretation, it puts forward a more simple weighted merging algorithm in this paper,and also makes comparison wiht some common merging methods. The effect of merging is evaluated by combined entropy and mean gradient finally.
出处
《测绘学院学报》
北大核心
2004年第2期105-107,共3页
Journal of Institute of Surveying and Mapping
