CanonNav: カメラ幾何からナビゲーション行動を分離するクロスプラットフォーム視覚ナビゲーション
CanonNav: Disentangling Navigation Behavior from Camera Geometry in Cross-Platform Visual Navigation
クロスプラットフォームのデモから視覚ナビゲーションを学習する際、カメラ幾何の影響を分離し、安全性と局所進行の補助監督を導入するフレームワークCanonNavを提案。RGBのみでRGB-D法を上回る性能を達成。
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著者: Dong-Wook Kim, Ji-Hoon Hwang, E-In Son, Mintaek Oh, Seung-Woo Seo
分類: cs.RO
原文アブストラクト
While visual navigation has advanced through imitation learning from cross-platform demonstrations, fully leveraging such data remains challenging. First, directly learning from image-trajectory pairs entangles navigation behavior with platform-dependent camera geometry. This hinders consistent learning by forcing the policy to implicitly infer camera geometry from visual observations, an inherently ill-posed problem. Second, imitation learning from demonstrated trajectories captures the expert's chosen motion but leaves the intermediate decisions underlying that motion implicit. To address these issues, we propose CanonNav, a visual navigation framework that disentangles navigation behavior from camera geometry and incorporates complementary planning supervision into learning from cross-platform demonstrations. CanonNav introduces camera geometry canonicalization, which transforms visual observations and trajectories into a camera-consistent representation space. Building on this representation, we derive safety and local-progress supervision using pseudo-labels from an offline traversability estimator. Safety supervision penalizes unsafe trajectories, while local-progress supervision guides where the robot should advance. Experiments across diverse camera configurations and environments show that, despite using only RGB at inference, CanonNav consistently outperforms RGB-based baselines and even surpasses RGB-D-based methods in challenging scenarios.