arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.07196cs.RO
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LIC-Fusion 2.0:具有滑动窗口平面特征跟踪的LiDAR-Inertial-Camera里程计

LIC-Fusion 2.0: LiDAR-Inertial-Camera Odometry with Sliding-Window Plane-Feature Tracking

ETH Zürich(苏黎世联邦理工学院);Zhejiang University(浙江大学);University of Delaware(特拉华大学);Microsoft Mixed Reality and Artificial Intelligence Lab(微软混合现实与人工智能实验室)

Xingxing Zuo, Yulin Yang, Patrick Geneva, Jiajun Lv, Yong Liu, Guoquan Huang, Marc Pollefeys

摘要:

来自商用惯性、视觉和激光雷达传感器的多模态测量的多传感器融合,以提供鲁棒和准确的6DOF姿态估计,在机器人技术及其他领域具有巨大的潜力。在本文中,基于我们先前的工作(即,LIC-Fusion),我们开发了一种基于滑动窗口滤波器的LiDAR惯性相机里程计,具有在线时空校准(即,LIC-Fusion 2.0),它引入了一种新的滑动窗口平面特征跟踪,用于有效地处理3D LiDAR点云。特别地,在通过利用IMU数据对LiDAR点进行运动补偿之后,跨滑动窗口提取和跟踪低曲率平面点。提出了一种新的离群点剔除准则,用于高质量数据关联的平面特征跟踪。只有属于同一平面的跟踪平面点将用于平面初始化,这使得平面提取高效且鲁棒。此外,我们进行了可观测性分析的LiDAR-IMU子系统,并报告退化的情况下使用平面特征的时空校准。虽然估计的一致性和识别的退化运动在蒙特卡洛模拟中进行了验证,但也进行了不同的真实世界的实验,以表明所提出的LIC-Fusion 2.0优于其前身和其他最先进的方法。

英文摘要:

Multi-sensor fusion of multi-modal measurements from commodity inertial, visual and LiDAR sensors to provide robust and accurate 6DOF pose estimation holds great potential in robotics and beyond. In this paper, building upon our prior work (i.e., LIC-Fusion), we develop a sliding-window filter based LiDAR-Inertial-Camera odometry with online spatiotemporal calibration (i.e., LIC-Fusion 2.0), which introduces a novel sliding-window plane-feature tracking for efficiently processing 3D LiDAR point clouds. In particular, after motion compensation for LiDAR points by leveraging IMU data, low-curvature planar points are extracted and tracked across the sliding window. A novel outlier rejection criterion is proposed in the plane-feature tracking for high-quality data association. Only the tracked planar points belonging to the same plane will be used for plane initialization, which makes the plane extraction efficient and robust. Moreover, we perform the observability analysis for the LiDAR-IMU subsystem and report the degenerate cases for spatiotemporal calibration using plane features. While the estimation consistency and identified degenerate motions are validated in Monte-Carlo simulations, different real-world experiments are also conducted to show that the proposed LIC-Fusion 2.0 outperforms its predecessor and other state-of-the-art methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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