BEACON: 遮蔽下での言語条件付きナビゲーション可能性予測
BEACON: Language-Conditioned Navigation Affordance Prediction under Occlusion
ロボットの周囲の遮蔽領域を含む鳥瞰図上で、言語指示に基づく移動可能な目標位置を予測する手法を提案。視覚言語モデルと深度情報を融合し、従来の画像空間予測より高い精度を達成した。
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著者: Xinyu Gao, Gang Chen, Javier Alonso-Mora
分類: cs.RO, cs.AI, cs.CV
原文アブストラクト
Language-conditioned local navigation requires a robot to infer a nearby traversable target location from its current observation and an open-vocabulary, relational instruction. Existing vision-language spatial grounding methods usually rely on vision-language models (VLMs) to reason in image space, producing 2D predictions tied to visible pixels. As a result, they struggle to infer target locations in occluded regions, typically caused by furniture or moving humans. To address this issue, we propose BEACON, which predicts an ego-centric Bird's-Eye View (BEV) affordance heatmap over a bounded local region including occluded areas. Given an instruction and surround-view RGB-D observations from four directions around the robot, BEACON predicts the BEV heatmap by injecting spatial cues into a VLM and fusing the VLM's output with depth-derived BEV features. Using an occlusion-aware dataset built in the Habitat simulator, we conduct detailed experimental analysis to validate both our BEV space formulation and the design choices of each module. Our method improves the accuracy averaged across geodesic thresholds by 22.74 percentage points over the state-of-the-art image-space baseline on the validation subset with occluded target locations. Our project page is: https://xin-yu-gao.github.io/beacon.
