DemoSpeedup:エントロピー誘導によるデモンストレーション加速で視覚運動ポリシーを高速化
DemoSpeedup: Accelerating Visuomotor Policies via Entropy-Guided Demonstration Acceleration
人間が収集した遅いデモを、フレームごとの行動エントロピーに基づいて間引き、精度が必要な区間はそのままに余裕のある区間を加速して学習させることで、成功率を保ちつつ最大3倍速く動く視覚運動ポリシーを実現した自己教師あり手法。
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?
3. 技術・手法の肝は?
4. どうやって有効だと検証した?
5. 議論はある?
6. 次に読むべき論文は?
※ AIが要旨から生成した要約です。正確性は原文をご確認ください。
著者: Lingxiao Guo, Zhengrong Xue, Zijing Xu, Huazhe Xu
分類: cs.RO
原文アブストラクト
Imitation learning has shown great promise in robotic manipulation, but the policy's execution is often unsatisfactorily slow due to commonly tardy demonstrations collected by human operators. In this work, we present DemoSpeedup, a self-supervised method to accelerate visuomotor policy execution via entropy-guided demonstration acceleration. DemoSpeedup starts from training an arbitrary generative policy (e.g., ACT or Diffusion Policy) on normal-speed demonstrations, which serves as a per-frame action entropy estimator. The key insight is that frames with lower action entropy estimates call for more consistent policy behaviors, which often indicate the demands for higher-precision operations. In contrast, frames with higher entropy estimates correspond to more casual sections, and therefore can be more safely accelerated. Thus, we segment the original demonstrations according to the estimated entropy, and accelerate them by down-sampling at rates that increase with the entropy values. Trained with the speedup demonstrations, the resulting policies execute up to 3 times faster while maintaining the task completion performance. Interestingly, these policies could even achieve higher success rates than those trained with normal-speed demonstrations, due to the benefits of reduced decision-making horizons. Project Page: https://demospeedup.github.io/
