HandsOnWorld: Unconstrained Egocentric Video Generation with Camera-Disentangled Hand Control
- URL: http://arxiv.org/abs/2607.02075v1
- Date: Thu, 02 Jul 2026 12:14:02 GMT
- Title: HandsOnWorld: Unconstrained Egocentric Video Generation with Camera-Disentangled Hand Control
- Abstract summary: We present HandsOnWorld, a framework for hand-controlled egocentric video generation that forgoes multi-view and marker-based motion capture, learning instead from unconstrained monocular video.<n>We build EgoVid-Pro, a dataset of clean, protagonist-only hand trajectories spanning 103K clips and roughly 12M frames across diverse everyday scenes.<n>We also propose the Plcker Hand Map, a 3D-aware control signal that extends Plcker-ray representations from camera rays to the hand surface, disentangling camera and hand motion at the representation level.
- Score: 51.913695868638634
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We present HandsOnWorld, a framework for hand-controlled egocentric video generation that forgoes multi-view and marker-based motion capture, learning instead from unconstrained monocular video. Such generality is bottlenecked by the scarcity of scalable 3D hand annotations: large egocentric corpora lack finger-level labels, whereas precise hand datasets are confined to narrow, instrumented settings, limiting prior hand-controlled generators to restricted scene distributions. We instead annotate 3D hands directly on in-the-wild egocentric video through monocular reconstruction, introducing a protagonist-centered annotation pipeline that filters the reconstructions at the action-semantic, image-quality, and 3D-geometric levels to build EgoVid-Pro, a dataset of clean, protagonist-only hand trajectories spanning 103K clips and roughly 12M frames across diverse everyday scenes. To resolve the camera-hand entanglement induced by large ego-motion, we further propose the Plücker Hand Map, a 3D-aware control signal that extends Plücker-ray representations from camera rays to the hand surface, disentangling camera and hand motion at the representation level. Experiments show that \method surpasses prior hand-controlled generators in reconstruction fidelity and control accuracy, and generalizes to out-of-distribution everyday scenes beyond the laboratory datasets on which prior methods rely.
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