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机载Li DAR获取的完整测区点云数据中包含了丰富的信息,同时也伴随着大量冗余数据,本文提出基于机载Li DAR点云时间纹理信息的航带重叠区消冗方法。首先按点云时间信息划分航带,再按点云纹理信息提取航带边缘,接着提取高地物遮挡空洞,最后去除重叠区冗余数据。实验结果表明,该方法无需航线信息辅助,并能在保留遮挡空洞区域点云的同时,高效地去除航带重叠区中精度较低的点云。
The complete measurement point cloud data acquired by airborne Li DAR contains a wealth of information and a large amount of redundant data. In this paper, a method of eliminating overlapped airplanes based on airborne Li DAR point cloud temporal texture information is proposed. Firstly, the navigation zone is divided according to the point cloud time information, then the edge of the navigation zone is extracted according to the point cloud texture information, and then the high places are extracted to cover the holes and finally the redundant data of the overlapping areas are removed. The experimental results show that this method does not need the aid of route information and can remove the point cloud with low accuracy in the overlap zone of the navigation band while preserving the point cloud in the sheltered hole area.