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arXiv · 2606.23298

Ocean4D: Generative Underwater 4D Reconstruction via Medium-Aware Video Diffusion

Yuqiang Huang·Yuxi Wang·Junyu Dong·Zhaoxiang Zhang
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Abstract

Underwater 4D reconstruction remains challenging due to the coupling between degraded light transport in participating media and dynamic water variations. Most existing Methods are developed under in-air assumptions and do not explicitly account for underwater absorption and backscatter. Additionally, near-static assumptions make these approaches sensitive to drifting particles and dynamic distractors , leading to unstable geometry and inconsistent cross-view results. To address these issues, we propose a generative framework for underwater 4D reconstruction, named Ocean4D, which is built on two complementary components. Specifically, 4D-GCC constructs 4D geometrically consistent conditioning with improved cross-frame coverage, while the Medium-Aware Block performs implicit medium-aware denoising in the latent diffusion process to stabilize underwater appearance under absorption and scattering. Given a monocular video and target cameras, our method generates videos along the target trajectories while preserving global structure and cross-view consistency. Extensive experiments on both dynamic and static underwater benchmarks demonstrate state-of-the-art performance on underwater reconstruction.

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Yuqiang Huang, Yuxi Wang, Junyu Dong, Zhaoxiang Zhang. 2026-06-22. Ocean4D: Generative Underwater 4D Reconstruction via Medium-Aware Video Diffusion. https://arxiv.org/abs/2606.23298

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