SfM-Free 3D Gaussian Splatting via Hierarchical Training

• URL: http://arxiv.org/abs/2412.01553v1
• Date: Mon, 02 Dec 2024 14:39:06 GMT
• Title: SfM-Free 3D Gaussian Splatting via Hierarchical Training
• Authors: Bo Ji, Angela Yao,
• Abstract summary: We propose a novel SfM-Free 3DGS (SFGS) method for video input, eliminating the need for known camera poses and SfM preprocessing.<n>Our approach introduces a hierarchical training strategy that trains and merges multiple 3D Gaussian representations into a single, unified 3DGS model.<n> Experimental results reveal that our approach significantly surpasses state-of-the-art SfM-free novel view synthesis methods.
• Score: 42.85362760049813
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Standard 3D Gaussian Splatting (3DGS) relies on known or pre-computed camera poses and a sparse point cloud, obtained from structure-from-motion (SfM) preprocessing, to initialize and grow 3D Gaussians. We propose a novel SfM-Free 3DGS (SFGS) method for video input, eliminating the need for known camera poses and SfM preprocessing. Our approach introduces a hierarchical training strategy that trains and merges multiple 3D Gaussian representations -- each optimized for specific scene regions -- into a single, unified 3DGS model representing the entire scene. To compensate for large camera motions, we leverage video frame interpolation models. Additionally, we incorporate multi-source supervision to reduce overfitting and enhance representation. Experimental results reveal that our approach significantly surpasses state-of-the-art SfM-free novel view synthesis methods. On the Tanks and Temples dataset, we improve PSNR by an average of 2.25dB, with a maximum gain of 3.72dB in the best scene. On the CO3D-V2 dataset, we achieve an average PSNR boost of 1.74dB, with a top gain of 3.90dB. The code is available at https://github.com/jibo27/3DGS_Hierarchical_Training.

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