センサ配置に依存しない幾何学的観測正規化によるナビゲーション
Sensor-Layout-Agnostic Navigation via Geometric Observation Canonicalization
任意の深度センサ配置から得た観測をロボット中心の統一球面距離画像に変換し、未観測領域も明示的に扱うことで、未知のカメラ配置にもゼロショットで適応するナビゲーション方策を実現した。
詳しい要約
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2. 先行研究と比べてどこがすごい?
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著者: Welf Rehberg, Kostas Alexis
分類: cs.RO
原文アブストラクト
Existing visual navigation policies are inherently bound to fixed camera configurations, creating a fundamental barrier to zero-shot deployment across heterogeneous robot sensor layouts. To overcome this limitation, we present an embodiment-informed navigation policy capable of generalizing across diverse depth sensor configurations on a specific aerial platform. Instead of implicitly learning spatial alignments, our approach explicitly unprojects depth measurements from arbitrary depth sensor payloads, varying in sensor count, mounting extrinsics, and intrinsics, into a shared robot-centric frame, stitching them into a unified spherical range image and a binary validity mask. This mask allows the downstream policy to explicitly distinguish covered space from unobserved blind spots. Trained via reinforcement learning with aggressive camera randomization, our policy generalizes zero-shot to unseen layouts featuring up to seven cameras, scaling success rates from 78% to 95% as total spatial sensing coverage increases. Finally, real-world flight trials on a physical quadrotor, conducted in an obstacle-filled corridor and an outdoor forest, validate the policy's zero-shot transfer across camera configurations and its resilience to sudden online sensor dropouts.