摘要
针对数字正射影像(DOM)接缝线穿越建筑物和独立地物而导致建筑物和独立地物出现错位的问题,本文提出了一种基于形态学滤波与Dijkstra算法的正射影像接缝线网络自动生成方法,该法可有效避免镶嵌影像中建筑物和独立地物产生错位。其基本思想是首先将数字表面模型(DSM)在保留地形、地势的基础上,将建筑物和独立地物过滤掉,然后利用Dijkstra算法自动生成正射影像接缝线网络。该方法自动生成的接缝线网络可避免穿越影像重叠区域中高差较大的区域,能确保镶嵌影像中地物的完整性,从而避免正射影像镶嵌处理后建筑物和独立地物出现错位。
Aiming at the problem that the digital orthophoto map(DOM)seamline passes through the building and the independent feature,which causes the building and the independent feature to be misaligned,this paper proposes an automatic orthophoto seamline network generation method based on morphological filtering and Dijkstra algorithm,which can effectively avoid the misalignment of buildings and independent features in mosaic images.It firstly filters out the buildings and independent features in the digital surface model(DSM)on the premise of preserving the terrain and topography,and then uses the Dijkstra algorithm to automatically generate the orthophoto seamline network.The seamline network automatically generated by this method can avoid crossing areas with large elevation differences in the image overlap area,and can ensure the integrity of the features in the mosaic image,thereby avoiding the misalignment of buildings and independent features after orthophoto mosaic processing.
作者
杨海成
李茂森
李云涛
梁四幺
杨彦超
YANG Haicheng;LI Maosen;LI Yuntao;LIANG Siyao;YANG Yanchao(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050000,China;CNNC Engineering Research Center of 3D Geographic Information,Shijiazhuang 050000,China)
出处
《测绘与空间地理信息》
2022年第9期226-228,231,共4页
Geomatics & Spatial Information Technology
