DirtyMoCap: Robust Motion Capture from Noisy, Unconstrained Markers

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Optical motion capture usually demands strict marker layouts and clean trajectories. DirtyMoCap is marker-layout-free: it maps unordered, sparse and noisy marker observations onto a fixed set of proxy anchors, skeletal joints plus body surface points, tracks them over long sequences with a recurrent sliding-window architecture, then fits SMPL-H using a custom differentiable Gauss-Newton solver. It ships HKMALA-Motion, 134 Kung Fu sequences across 22 styles totalling about 3 hours.