NoPe‐NeRF++: Local‐to‐Global Optimization of NeRF with No Pose Prior

In this paper, we introduce NoPe‐NeRF++, a novel local‐to‐global optimization algorithm for training Neural Radiance Fields (NeRF) without requiring pose priors. Existing methods, particularly NoPe‐NeRF, which focus solely on the local relationships within images, often struggle to recover accurate...

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Bibliographic Details
Published in:Computer graphics forum Vol. 44; no. 2
Main Authors: Shi, Dongbo, Cao, Shen, Wu, Bojian, Guo, Jinhui, Fan, Lubin, Chen, Renjie, Liu, Ligang, Ye, Jieping
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.05.2025
Subjects:
Bundle adjustment
CCS Concepts
Computing methodologies → Image‐based rendering
Global optimization
Optimization
Pose estimation
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:In this paper, we introduce NoPe‐NeRF++, a novel local‐to‐global optimization algorithm for training Neural Radiance Fields (NeRF) without requiring pose priors. Existing methods, particularly NoPe‐NeRF, which focus solely on the local relationships within images, often struggle to recover accurate camera poses in complex scenarios. To overcome the challenges, our approach begins with a relative pose initialization with explicit feature matching, followed by a local joint optimization to enhance the pose estimation for training a more robust NeRF representation. This method significantly improves the quality of initial poses. Additionally, we introduce global optimization phase that incorporates geometric consistency constraints through bundle adjustment, which integrates feature trajectories to further refine poses and collectively boost the quality of NeRF. Notably, our method is the first work that seamlessly combines the local and global cues with NeRF, and outperforms state‐of‐the‐art methods in both pose estimation accuracy and novel view synthesis. Extensive evaluations on benchmark datasets demonstrate our superior performance and robustness, even in challenging scenes, thus validating our design choices.
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These authors contributed equally to this work.
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.70012