OmniEgoCap: Camera-Agnostic Sequence-Level Egocentric Motion Reconstruction

Kyungwon Cho; Hanbyul Joo

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arXiv · 2512.19283

OmniEgoCap: Camera-Agnostic Sequence-Level Egocentric Motion Reconstruction

Kyungwon Cho·Hanbyul Joo

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Abstract

The proliferation of commercial egocentric devices offers a unique lens into human behavior, yet reconstructing full-body 3D motion remains difficult due to frequent self-occlusion and the 'out-of-sight' nature of the wearer's limbs. While head and hand trajectories provide sparse anchor points, current methods often overfit to specific hardware optics or rely on expensive, post-hoc optimizations that compromise motion naturalness. In this paper, we present OmniEgoCap, a unified diffusion framework that scales egocentric reconstruction to diverse capture setups. By shifting from short-term windowed estimation to sequence-level inference, our method captures a global perspective and recovers invariant physical attributes, such as height and body proportions, that provide critical constraints for disambiguating head-only cues. To ensure hardware-agnostic generalization, we introduce a geometry-aware visibility augmentation strategy that treats intermittent hand appearances as principled geometric constraints rather than missing data. Our architecture jointly predicts temporally coherent motion and consistent body shape, establishing a new state-of-the-art on public benchmarks and demonstrating robust performance across diverse, in-the-wild environments.

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BibTeX RIS

Kyungwon Cho, Hanbyul Joo. 2026-03-31. OmniEgoCap: Camera-Agnostic Sequence-Level Egocentric Motion Reconstruction. https://arxiv.org/abs/2512.19283

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