RealD²iff: 深度拡散によるロボットマニピュレーションの実世界ギャップの橋渡し
RealD$^2$iff: Bridging Real-World Gap in Robot Manipulation via Depth Diffusion
拡散モデルでシミュレーションのクリーンな深度から実機のようなノイズ深度を合成し、実機データ収集なしでゼロショットsim2realマニピュレーションを実現した研究。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
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著者: Xiujian Liang, Jiacheng Liu, Mingyang Sun, Qichen He, Cewu Lu, Jianhua Sun
分類: cs.RO, cs.CV
原文アブストラクト
Robot manipulation in the real world is fundamentally constrained by the visual sim2real gap, where depth observations collected in simulation fail to reflect the complex noise patterns inherent to real sensors. In this work, inspired by the denoising capability of diffusion models, we invert the conventional perspective and propose a clean-to-noisy paradigm that learns to synthesize noisy depth, thereby bridging the visual sim2real gap through purely simulation-driven robotic learning. Building on this idea, we introduce RealD$^2$iff, a hierarchical coarse-to-fine diffusion framework that decomposes depth noise into global structural distortions and fine-grained local perturbations. To enable progressive learning of these components, we further develop two complementary strategies: Frequency-Guided Supervision (FGS) for global structure modeling and Discrepancy-Guided Optimization (DGO) for localized refinement. To integrate RealD$^2$iff seamlessly into imitation learning, we construct a pipeline that spans six stages. We provide comprehensive empirical and experimental validation demonstrating the effectiveness of this paradigm. RealD$^2$iff enables two key applications: (1) generating real-world-like depth to construct clean-noisy paired datasets without manual sensor data collection. (2) Achieving zero-shot sim2real robot manipulation, substantially improving real-world performance without additional fine-tuning.
