Reference Pose Generation for Long-term Visual Localization via Learned Features and View Synthesis

• URL: http://arxiv.org/abs/2005.05179v4
• Date: Wed, 30 Dec 2020 14:29:28 GMT
• Title: Reference Pose Generation for Long-term Visual Localization via Learned Features and View Synthesis
• Authors: Zichao Zhang, Torsten Sattler, Davide Scaramuzza
• Abstract summary: We propose a semi-automated approach to generate reference poses based on feature matching between renderings of a 3D model and real images via learned features. We significantly improve the nighttime reference poses of the popular Aachen Day-Night dataset, showing that state-of-the-art visual localization methods perform better (up to $47%$) than predicted by the original reference poses.
• Score: 88.80710311624101
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Visual Localization is one of the key enabling technologies for autonomous driving and augmented reality. High quality datasets with accurate 6 Degree-of-Freedom (DoF) reference poses are the foundation for benchmarking and improving existing methods. Traditionally, reference poses have been obtained via Structure-from-Motion (SfM). However, SfM itself relies on local features which are prone to fail when images were taken under different conditions, e.g., day/ night changes. At the same time, manually annotating feature correspondences is not scalable and potentially inaccurate. In this work, we propose a semi-automated approach to generate reference poses based on feature matching between renderings of a 3D model and real images via learned features. Given an initial pose estimate, our approach iteratively refines the pose based on feature matches against a rendering of the model from the current pose estimate. We significantly improve the nighttime reference poses of the popular Aachen Day-Night dataset, showing that state-of-the-art visual localization methods perform better (up to $47\%$) than predicted by the original reference poses. We extend the dataset with new nighttime test images, provide uncertainty estimates for our new reference poses, and introduce a new evaluation criterion. We will make our reference poses and our framework publicly available upon publication.

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