融合抗旋转哈希算法的无控DEM匹配方法  

DEM Matching Method without Control Fused with Anti-rotation Hash Algorithm

作　　者：付洪波 李坛 李参海 陈心怡 FU Hongbo;LI Tan;LI Canhai;CHEN Xinyi(The Third Topographic Surveying Brigade,MNR,Harbin 150025,China;Land Satellite Remote Sensing Application Center,MNR,Beijing 100089,China;School of Slavic Languages,Harbin Normal University,Harbin 150500,China)

机构地区：[1]自然资源部第三地形测量队,黑龙江哈尔滨150025 [2]自然资源部国土遥感卫星应用中心,北京100048 [3]哈尔滨师范大学斯拉夫语学院,黑龙江哈尔滨150500

出　　处：《测绘与空间地理信息》2022年第12期169-172,179,共5页Geomatics & Spatial Information Technology

摘　　要：针对多源数字高程模型(DEM)数据因地表形变引起误差,传统的基于面的DEM匹配方法对初始匹配状态要求严格的问题,本文提出了一种新的两步式DEM匹配算法。首先,使用抗旋转的哈希算法进行DEM之间的粗匹配,估算DEM之间转换参数的粗值,结合待匹配DEM生成粗匹配DEM;然后,使用最小高差法(LZD)计算粗匹配DEM与基准DEM之间精确的转换参数,最终实现无控制点的DEM数据之间的高精度匹配。结合使用多源DEM数据进行匹配实验,实验数据显示粗匹配可以改善DEM之间的初始匹配状态从而减少精匹配的迭代次数。实验结果表明,本文提出的方法能够在没有初始匹配参数的情况下扩大DEM数据的匹配范围,提高迭代效率,减少匹配时间。In order to solve the problem that the error of multi-source digital elevation model(DEM)data is caused by surface deformation,the traditional surface-based DEM matching method has strict requirements on the initial matching state.In this paper,a new two-step DEM matching algorithm is proposed.Firstly,the anti-rotation Hash algorithm was used to perform rough matching among DEMs,and the rough value of conversion parameters between DEMs was estimated.The rough matching DEM was generated by combining the DEM to be matched.Then,the least Z-axis different(LZD)algorithm is used to calculate the exact conversion parameters between the rough matched DEM and the reference DEM,and finally the high precision matching between the DEM data without control points is achieved.Using multi-source DEM data for matching experiments,the experimental data show that rough matching can improve the initial matching state between DEMs and reduce the number of iterations of fine matching.The experimental results show that this method can expand the matching range of the DEM data without the initial matching parameters in advance and can also improve the iteration efficiency and reduce the calculation time.

关 键 词：DEM无控制匹配 最小二乘曲面匹配 抗旋转哈希 极坐标哈希 

分 类 号：P208[天文地球—地图制图学与地理信息工程]