The point cloud data scanned by the low-beam LiDAR is relatively sparse, resulting in poor 3D object detection in the unmanned environment perception system.Multi-frame point cloud registration can achieve sparse point cloud densification, however, pedestrians and movin...MORE The point cloud data scanned by the low-beam LiDAR is relatively sparse, resulting in poor 3D object detection in the unmanned environment perception system.Multi-frame point cloud registration can achieve sparse point cloud densification, however, pedestrians and moving vehicles in a dynamic environment will reduce the ...