LiLi: リー理論に基づく3D LiDARスキャン位置合わせの退化検出
LiLi: Lie Theory Based 3D LiDAR Scan Alignment Degeneracy Detection
リー群SE(3)のリー代数を用いて、直線通路や平坦な環境で生じる位置合わせの退化変換を体系的に検出する手法を提案し、ノイズ下での精度と実環境での自己位置推定性能を向上させた。
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著者: Vsevolod Hulchuk, Jan Bayer, Jan Faigl
分類: cs.RO
原文アブストラクト
In this paper, we study 3D LiDAR scan alignment in challenging scenarios with degeneracies, such as straight corridors or flat fields, where the alignment solution is not unique and compromises localization and mapping accuracy. Existing degeneracy detection methods that neglect the potential for reassociating data points are prone to being sensitive to noise and complex degeneracies. Therefore, we propose LiLi - a novel method that leverages Lie theory to identify the full set of degenerate transformations within the SE(3) Lie group of rigid transformations. The method employs perturbations of the optimized solution and compares the resulting optimized poses to ensure robust detection of degeneracies. By leveraging generators from the Lie algebra se(3), the method provides a systematic approach to describing the set of degenerate transformations. Quantitative evaluations on synthetic data show significant improvement over the state-of-the-art Hessian-based method, reducing alignment error by 50%, with more significant improvements for datasets featuring noise. In the real-world degenerate datasets, the proposed method integrated into LiDAR-based odometry yields superior localization performance compared to the reference solution based on the Hessian-based degeneracy detector on a 260 m long trajectory, and succeeds on a 430 m long round-trip tunnel trajectory where the reference fails.
関連論文
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