シックスセンス：平面LiDARによる人間の空間認識の自己教師あり学習
Sixth-Sense: Self-Supervised Learning of Spatial Awareness of Humans from a Planar Lidar
RGB-Dカメラの検出を教師信号として、1D LiDARデータから人間の検出と2D姿勢推定を自己教師ありで行う手法を提案し、低コストでプライバシー保護型の全方向人間認識を実現した。
著者: Simone Arreghini, Nicholas Carlotti, Mirko Nava, Antonio Paolillo, Alessandro Giusti
分類: cs.RO, cs.LG
原文アブストラクト
Reliable localization of people is fundamental for service and social robots that must operate in close interaction with humans. State-of-the-art human detectors often rely on RGB-D cameras or costly 3D LiDARs. However, most commercial robots are equipped with cameras with a narrow field of view, leaving them unaware of users approaching from other directions, or inexpensive 1D LiDARs whose readings are hard to interpret. To address these limitations, we propose a self-supervised approach to detect humans and estimate their 2D pose from 1D LiDAR data, using detections from an RGB-D camera as supervision. Trained on 70 minutes of autonomously collected data, our model detects humans omnidirectionally in unseen environments with 71% precision, 80% recall, and mean absolute errors of 13cm in distance and 44{\deg} in orientation, measured against ground truth data. Beyond raw detection accuracy, this capability is relevant for robots operating in shared public spaces, where omnidirectional awareness of nearby people is crucial for safe navigation, appropriate approach behavior, and timely human-robot interaction initiation using low-cost, privacy-preserving sensing. Deployment in two additional public environments further suggests that the approach can serve as a practical wide-FOV awareness layer for socially aware service robotics.
