IN2LAAMA: INertial Lidar Localisation Autocalibration And MApping

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Authors IEEE, Senior, Member, and Shoudong Huang, Cedric Le Gentil, Teresa Vidal-Calleja
Journal/Conference Name IEEE 2020 4
Paper Category
Paper Abstract Abstract—In this paper, we present INertial Lidar Localisa- tion Autocalibration And MApping (IN2LAAMA): an offline probabilistic framework for localisation, mapping, and extrinsic calibration based on a 3D-lidar and a 6-DoF-IMU. Most of today’s lidars collect geometric information about the surround- ing environment by sweeping lasers across their field of view. Consequently, 3D-points in one lidar scan are acquired at different timestamps. If the sensor trajectory is not accurately known, the scans are affected by the phenomenon known as motion distortion. The proposed method leverages preintegration with a continuous representation of the inertial measurements to characterise the system’s motion at any point in time. It enables precise correction of the motion distortion without relying on any explicit motion model. The system’s pose, velocity, biases, and time-shift are estimated via a full batch optimisation that includes automatically generated loop-closure constraints. The autocalibration and the registration of lidar data rely on planar and edge features matched across pairs of scans. The performance of the framework is validated through simulated and real-data experiments. Index Terms—Lidar, inertial measurement unit, IMU, locali- sation, mapping, SLAM, calibration
Date of publication 2020
Code Programming Language Unspecified
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