arXiv AI By Xuanzhi Liu, Xinyi Wu, Hang Pan, Wensi Huang, Zhenyao Wu, Ruize Han, Song Wang

ClearGS: Reliability-Aware Gaussian Splatting from Handheld Videos

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ClearGS is a method for 3D Gaussian Splatting from handheld videos that addresses uneven viewpoint coverage and mixed frame quality. It introduces Reliability‑aware View Allocation to assign graded supervision weights based on appearance reliability, degradation risk, and geometric utility, and weakly reactivates suppressed frames to maintain trajectory coverage. Additionally, Render‑Guided In‑Video Restoration uses a frozen no‑reference restoration expert and perceptual scoring to recover details lost to blur or distortion, followed by Full‑Trajectory Repair Consolidation to preserve early‑introduced details. On the GS2E and GSOTM datasets, ClearGS achieves state‑of‑the‑art performance with consistent CLIP‑IQA and MUSIQ gains and LPIPS reductions across most degradation settings, all without paired sharp supervision or matched clean references.

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arXiv Computer Vision
Aug 25

GaussVid: Sparse-View Gaussian Splatting with 3D-Aware Video Diffusion Priors

GaussVid introduces a 3D-aware video restoration framework that enhances sparse-view 3D Gaussian Splatting (3DGS) reconstructions. By creating a large-scale 3DGS video dataset and employing a camera-conditioned geometric prior anchored on the first and last frames, the method injects spatial structure into video generation, ensuring geometrically grounded restoration across viewpoints. Experiments demonstrate superior pixel- and structure-level fidelity (PSNR/SSIM) and improved multi-view consistency compared to other video-prior restoration methods, while maintaining competitive perceptual quality (LPIPS).

By Xinhui Liu, Can Wang, Wei Jiang, Wei Wang, Dong Xu
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Bi-FlowGS: Bridging Generative View Completion and Gaussian Geometry through Bidirectional Flow Co-Refinement

Bi-FlowGS introduces a bidirectional co-refinement framework that links generative view completion with 3D Gaussian Splatting geometry. It employs Video-to-Geometry Flow Distillation (V2G) to transfer temporal correspondence from restored videos into Gaussian geometry, mitigating the Geometry Cheating problem. Simultaneously, Geometry-to-Video Flow-Guided Restoration (G2V) uses the current 3DGS geometry to guide temporally consistent video restoration, creating a loop where restored videos and optimized geometry iteratively improve each other, leading to better rendering quality and geometric consistency on wide-baseline and 360° benchmarks.

By Yuetong Wang, Jinsheng Quan, Yi Yang, Yawei Luo