ImagiNav: 生成的視覚予測と逆動力学によるスケーラブルな身体化ナビゲーション
ImagiNav: Scalable Embodied Navigation via Generative Visual Prediction and Inverse Dynamics
ロボットのナビゲーションを、言語指示を視覚的なサブゴールに分解し、生成ビデオモデルで未来の軌道を想像し、逆動力学モデルで軌道を抽出するというモジュール方式で実現。ロボットデータなしでゼロショット転移を達成する。
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著者: Jie Chen, Yuxin Cai, Yizhuo Wang, Ruofei Bai, Yuhong Cao, Jun Li, Yau Wei Yun, Guillaume Sartoretti
分類: cs.RO
原文アブストラクト
Enabling robots to navigate open-world environments via natural language is critical for general-purpose autonomy. Yet, Vision-Language Navigation has relied on end-to-end policies trained on expensive, embodiment-specific robot data. While recent foundation models trained on vast simulation data show promise, the challenge of scaling and generalizing due to the limited scene diversity and visual fidelity in simulation persists. To address this gap, we propose ImagiNav, a novel modular paradigm that decouples visual planning from robot actuation, enabling the direct utilization of diverse in-the-wild navigation videos. Our framework operates as a hierarchy: a Vision-Language Model first decomposes instructions into textual subgoals; a finetuned generative video model then imagines the future video trajectory towards that subgoal; finally, an inverse dynamics model extracts the trajectory from the imagined video, which can then be tracked via a low-level controller. We additionally develop a scalable data pipeline of in-the-wild navigation videos auto-labeled via inverse dynamics and a pretrained Vision-Language Model. ImagiNav demonstrates strong zero-shot transfer to robot navigation without requiring robot demonstrations, paving the way for generalist robots that learn navigation directly from unlabeled, open-world data.
