Author

Songchen Ma

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Preprint Oct 2026

PIE-PS: Photometric Stereo from Physical Irradiance Event Streams

Event cameras record asynchronous log-image-irradiance changes with microsecond latency and high dynamic range. These properties are useful for photometric stereo under moving illumination, but raw events are sparse and depend on an unknown contrast threshold. We start from the event trigger model and derive a physical...

Xiang-Ze Meng, Guang-Yu Li, Jing Li et al. · 0 citations

Preprint Sep 2026

Causal-History Test-Time Scaling for Failure Recovery in Autoregressive World-Action Models

World-action models (WAMs) have emerged as a promising paradigm for robot manipulation by jointly modeling future visual dynamics and robot actions. However, existing WAMs are trained predominantly on successful trajectories, making them prone to failure when real-world execution diverges from the learned dynamics. Thi...

Lin Li, Long Chen, Kwunhang Wong et al. · 0 citations