【摘要】 提出了一种不同于传统的地形匹配方法 .利用角分辨率和测距精度高的激光扫描雷达 ,实时获取激光发射点到飞行器下方一定范围内地面采样点的斜向距离 ,通过重采样和插值技术恢复出各采样点的高程 ,然后和预存的参考图进行匹配 .匹配中将高程直接相关匹配和基于小波变换的多尺度特征匹配相结合 .在尽量保证实时性的同时 ,获得了较高的捕获概率和定位精度 .初步仿真检验了该方法的优越性 .更多还原

【Abstract】 A new terrain matching algorithm is presented by using airborne laser scanning altimeter. In real time, the distance between the sensor and the ground sampled site is determined by the airborne lidar, thus results in the distance map. A recovered elevation map from the distance map has matched the reference DEM. The edge feature matching based on wavelet decomposition and the common elevation correlation are combined. The performances of the matching algorithm are demonstrated by simulation results.更多还原