基于Plücker直线的机载LiDAR点云与航空影像的配准

机载LiDAR点云与航空影像的配准是地物提取的关键。本文提出了基于Plücker直线的机载LiDAR点云与航空影像的配准模型。基于三维线空间线变换Plücker直线方程,确定点云和影像中的同名直线间的相对位姿关系,建立Plücker直线共面条件方程,通过影像上的Plücker直线在三维线空间中的螺旋运动,实现像点到其对应LiDAR点的坐标变换。结果表明,Plücker直线共面条件配准模型简洁,将旋转和平移统一处理,避免了两者间的耦合误差,提高了配准精度,为获取高质量的地球三维空间信息提供了技术支持。

Registration of Aerial Image with Airborne LiDAR Data Based on Plücker Line

Registration of aerial image with airborneLiDAR data is a key to feature extraction .A registra‐tion model based on Plücker line is proposed .The relative position and attitude relationship between the conjugate lines in LiDAR and image is determined based on Plücker linear equation ,which describes line transformation in space ,then copl anarity condition equation is established .Finally ,coordinate transforma‐tion between image point and corresponding LiDAR point is achieved by the spiral movement of Plücker lines in the image .The registration model of Plücker linear coplanarity condition equation is simple ,and jointly describes the rotation and translation to avoid coupling error between them ,so the accuracy is approved .This research provides technical support for high‐quality earth spatial information acquisition .