Scalix: 不確実性を考慮したスケール一貫性のある単眼SLAM
Scalix: Uncertainty-Aware Scale-Consistent Monocular SLAM
単眼SLAMのスケール曖昧性を解決するため、学習された深度情報を確率的因子グラフに統合し、ピクセル単位とフレーム単位の不確実性を考慮してメートルスケールの状態推定を実現するフレームワークを提案した。
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著者: Sebastian Barbas Laina, Tianyi Zhang, Panagiotis Petropoulakis, Simon Schaefer, Simon Boche, Jaehyung Jung, Cedric Le Gentil, Stefan Leutenegger
分類: cs.RO
原文アブストラクト
Cameras are ubiquitous sensors in robotics due to their compact form factor and the perceptual richness captured through visual information. Monocular SLAM enables robots to understand the environment with a minimum setup, however, it inherently suffers from scale ambiguity. A common solution is to provide multi-modal sensor configurations, such as visual-inertial systems, where scale is observable unless the robot navigates under a constant-velocity motion, a common scenario in mobile robotics. With the advent of deep-learning, geometric foundation models have been used to address this problem, but the depths maps are often noisy and scale-inconsistent across frames. In this paper, we propose Scalix, a real-time monocular SLAM framework that achieves metric-scale state estimation by integrating learned depth cues into a probabilistic factor-graph formulation. By augmenting existing monocular depth models with both per-pixel depth uncertainty and per-frame scale uncertainty, Scalix treats scale predictions as independent measurements within its optimization, leading to improved scale consistency through multi-view data associations. Experiments in large-scale outdoor and indoor environments demonstrate state-of-the-art performance on both metric and up-to-scale benchmarks while maintaining real-time operation and generalization.