STRIVE: VLM推論を統合した構造的表現による効率的物体ナビゲーション
STRIVE: Structured Representation Integrating VLM Reasoning for Efficient Object Navigation
VLMを物体ナビゲーションに活用するため、環境を視点・物体・部屋の階層で表現し、VLM推論による高レベル計画と低レベル探索を組み合わせる二段階方策を提案。シミュレーションと実機で成功率と効率を向上させた。
詳しい要約
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著者: Haokun Zhu, Zongtai Li, Zhixuan Liu, Wenshan Wang, Ji Zhang, Jonathan Francis, Jean Oh
分類: cs.RO
原文アブストラクト
Vision-Language Models (VLMs) have been increasingly integrated into object navigation tasks for their rich prior knowledge and strong reasoning abilities. However, applying VLMs to navigation poses two key challenges: effectively representing complex environment information and determining \textit{when and how} to query VLMs. Insufficient environment understanding and over-reliance on VLMs (e.g. querying at every step) can lead to unnecessary backtracking and reduced navigation efficiency, especially in continuous environments. To address these challenges, we propose a novel framework that constructs a multi-layer representation of the environment during navigation. This representation consists of viewpoint, object nodes, and room nodes. Viewpoints and object nodes facilitate intra-room exploration and accurate target localization, while room nodes support efficient inter-room planning. Building on this representation, we propose a novel two-stage navigation policy, integrating high-level planning guided by VLM reasoning with low-level VLM-assisted exploration to efficiently locate a goal object. We evaluated our approach on three simulated benchmarks (HM3D, RoboTHOR, and MP3D), and achieved state-of-the-art performance on both the success rate ($\mathord{\uparrow}\, 7.1\%$) and navigation efficiency ($\mathord{\uparrow}\, 12.5\%$). We further validate our method on a real robot platform, demonstrating strong robustness across 15 object navigation tasks in 10 different indoor environments. Project page is available at https://zwandering.github.io/STRIVE.github.io/ .
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