Geometry beneath the Waves: Dense Priors for Sparse-View Underwater 3D Gaussian Splatting

Harvey Caldeira; Haoran Wang; Guoxi Huang; Shaoyu Cai; Rachel Fu; Nantheera Anantrasirichai

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arXiv · 2609.18737

Geometry beneath the Waves: Dense Priors for Sparse-View Underwater 3D Gaussian Splatting

Harvey Caldeira·Haoran Wang·Guoxi Huang·Shaoyu Cai·Rachel Fu·Nantheera Anantrasirichai

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Abstract

Underwater 3D reconstruction supports applications ranging from marine ecosystem monitoring and subsea inspection to underwater archaeology, education, and immersive visualisation. 3D Gaussian Splatting has made real-time photorealistic novel-view rendering practical, while underwater variants incorporate physically based image-formation models to separate medium effects from scene radiance. Their reconstruction quality, however, remains fundamentally limited by the geometry used for initialisation.

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Harvey Caldeira, Haoran Wang, Guoxi Huang, Shaoyu Cai, Rachel Fu, Nantheera Anantrasirichai. 2026-09-16. Geometry beneath the Waves: Dense Priors for Sparse-View Underwater 3D Gaussian Splatting. https://arxiv.org/abs/2609.18737

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