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ZENODO
Preprint . 2025
License: CC BY
Data sources: ZENODO
ZENODO
Preprint . 2025
License: CC BY
Data sources: Datacite
ZENODO
Preprint . 2025
License: CC BY
Data sources: Datacite
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NaviLoc: Visual Global Localization and Refinement for GNSS-Denied UAV Navigation

Authors: Shpagin, Pavel;

NaviLoc: Visual Global Localization and Refinement for GNSS-Denied UAV Navigation

Abstract

Visual localization of Unmanned Aerial Vehicles (UAVs) using satellite imagery enables GNSS-freenavigation but faces a fundamental challenge: the extreme domain gap between aerial and satelliteviews causes visual place recognition (VPR) to fail unpredictably along the trajectory. We identifythat a primary cause of this failure is heading-dependent feature ambiguity—standard CNN featuresare not rotation invariant, causing matches to degrade when the UAV’s heading deviates from thesatellite’s canonical North orientation. We present NaviLoc, a three-stage localization pipeline thataddresses this through heading rectification: after coarse global alignment, we rotate query images toa canonical orientation using VIO-derived headings before extracting features for local refinement.Combined with overlapping sliding-window SE(2) optimization, NaviLoc achieves 20.38m AbsoluteTrajectory Error (ATE) on a challenging UAV-to-satellite benchmark—a 31× improvement over VIOdrift and 17× over state-of-the-art VPR methods. Our approach requires no dataset-specific tuningand runs in real-time using a lightweight MobileNet-V3 backbone.

Keywords

robotics, visual place recognition, GNSS-denied navigation, visual global localization, computer vision, UAV localization

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green