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arXiv · 2610.41028

Contact Imitation Interface: Transferring Dexterous Skills by Showing How Contact Unfolds

Zhixuan Xu·Yichen Li·Bingchen Wu·Rui Wang·Yiwen Hou·Zixuan Liu·Tianyu Qiu·Lin Shao
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Abstract

Robot-free human demonstrations offer a promising route to scaling dexterous manipulation data. The key challenge is to preserve the demonstrator's natural dexterity while producing contact-grounded observations and actions that transfer to robot hands. We present Contact Imitation Interface (CIMI), a framework with contact-grounded demonstration and learning interfaces. The demonstration interface combines shared contact geometry and fingertip RGB views with contact-alignment-first retargeting and reprojection of wider scene views. The learning interface introduces a hierarchical policy in which a contact-surface planner predicts relative contact-surface trajectories and a controller coordinates wrist and finger commands to improve contact alignment. CIMI combines contact-grounded observations, retargeting, and action representations, improving mean final-stage success by at least 50 percentage points over baseline policies across six hand-task pairs on LEAP and Wuji. Hardware designs and software are publicly available.

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Zhixuan Xu, Yichen Li, Bingchen Wu, Rui Wang, Yiwen Hou, Zixuan Liu, Tianyu Qiu, Lin Shao. 2026-10-29. Contact Imitation Interface: Transferring Dexterous Skills by Showing How Contact Unfolds. https://arxiv.org/abs/2610.41028

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