基于平面约束的机载LiDAR航带平差方法研究

机载LiDAR技术作为一种新型的主动式空间观测技术,在快速获取空间三维地理信息方面具有不可估量的前景。然而,机载LiDAR系统获得的相邻航带点云数据在重叠区存在"漂移"问题,需要采用航带平差的方法实现不同航带点云数据之间的"无缝"拼接。针对LiDAR点云数据难以获取同名特征点来进行航带平差迭代初始值计算的问题,文中在总结航带平差迭代初始值求解方法的基础上,提出一种基于点与平面约束关系的最小二乘求解方法,提高初始值求解的准确性,并通过具体实例数据进行验证分析。

Research on the method of airborne LiDAR strip adjustment based on plane constraint

As a new type of active earth observation technology from space ,the airborne LiDAR technology serves as an incalculable prospect in fast access to spatial three‐dimensional geographic information . However ,there has been a problem of data drifting in overlap region from two adjacent air‐strips ,and different strip adjustment methods are required to splice the data seamlessly .Aiming to obtain the initial value in strip adjustment iteration ,on the basis of summarizing the related computing methods ,it proposes a new algorithm using the least squares model to get a more accurate initial iteration value ,w hich makes use of the constrains between the point and plane .Specific experiments are implemented to analyze and validate the effect of method presented .