慣性・非慣性座標系に対応する視覚慣性オドメトリ
NIF-VIO: Visual--Inertial Odometry Across Inertial and Non-Inertial Reference Frames
カメラとIMUの観測が慣性系で一致するという従来の前提が崩れる非慣性環境に対応するため、計測の一貫性に応じて融合を適応させるVIO手法NIF-VIOを提案した。
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著者: Zichao Shu, Lijun Li, Zhuochen Li, Zetao Chen, Jianyu Wang
分類: cs.RO
原文アブストラクト
Conventional visual--inertial odometry (VIO) assumes that observations from cameras and an inertial measurement unit (IMU) are jointly consistent in an inertial reference frame. However, this assumption breaks down under non-inertial conditions. Inside accelerating or rotating carriers, visual observations of the interior reflect carrier-relative motion, while IMU measurements contain additional carrier-induced components, which can compromise conventional fusion. We therefore present NIF-VIO for localization relative to the local environment across inertial and non-inertial reference frames. It adapts visual--inertial fusion based on measurement consistency. As inertial conditions change, early constraint isolation is combined with local reoptimization to limit error propagation before inconsistency confirmation and repair the affected local geometry. Under non-inertial conditions, a compact model with temporally shared parameters is introduced to account for carrier motion while preserving inertial information that complements visual constraints. Experiments on public benchmarks and a self-collected dataset demonstrate that NIF-VIO achieves competitive performance under inertial conditions and improved localization accuracy and availability under non-inertial conditions.