提出全景视觉惯性SLAM框架,提升无人机复杂场景定位精度与鲁棒性。
PanoAir: A Panoramic Visual-Inertial SLAM with Cross-Time Real-World UAV Dataset
- 利用全景特征提取与环路闭合,增强全局一致性约束。
- 在自建数据集与公开基准上均实现更优定位精度与稳定性。
- 可在嵌入式平台部署,兼具高效性与实用性,适合无人机导航应用。
精准位姿估计是无人飞行器(UAV)应用的基础,视觉惯性SLAM(VI-SLAM)为定位与建图提供了低成本解决方案。然而,现有方法多依赖视场受限的传感器,在复杂无人机场景中易出现漂移甚至失效。尽管全景相机可提供全向感知以增强鲁棒性,但针对无人机的全景视觉惯性SLAM及其真实世界数据集仍研究不足。为此,本文首次构建了一个覆盖多种飞行条件的真实世界全景视觉惯性数据集,包含不同光照、高度、轨迹长度及运动动态。为在复杂场景中实现高精度、鲁棒的位姿估计,提出一种全景视觉惯性SLAM框架,通过所提出的全景特征提取与全景环路闭合机制,充分利用全向视场优势,增强特征约束并保障全局一致性。在自建数据集及公开基准上的大量实验表明,该方法在精度、鲁棒性与一致性方面均优于现有方法。此外,嵌入式平台部署验证了其实用性,计算效率与桌面级实现相当。源代码与数据集已公开于 https://drive.google.com/file/d/1lG1Upn6yi-N6tYpEHAt6dfR1uhzNtWbT/view。
原文摘要 · Abstract (English)
Accurate pose estimation is fundamental for unmanned aerial vehicle (UAV) applications, where Visual-Inertial SLAM (VI-SLAM) provides a cost-effective solution for localization and mapping. However, existing VI-SLAM methods mainly rely on sensors with limited fields of view (FoV), which can lead to drift and even failure in complex UAV scenarios. Although panoramic cameras provide omnidirectional perception to improve robustness, panoramic VI-SLAM and corresponding real-world datasets for UAVs remain underexplored. To address this limitation, we first construct a real-world panoramic visual-inertial dataset covering diverse flight conditions, including varying illumination, altitudes, trajectory lengths, and motion dynamics. To achieve accurate and robust pose estimation under such challenging UAV scenarios, we propose a panoramic VI-SLAM framework that exploits the omnidirectional FoV via the proposed panoramic feature extraction and panoramic loop closure, enhancing feature constraints and ensuring global consistency. Extensive experiments on both the proposed dataset and public benchmarks demonstrate that our method achieves superior accuracy, robustness, and consistency compared to existing approaches. Moreover, deployment on embedded platform validates its practical applicability, achieving comparable computational efficiency to PC implementations. The source code and dataset are publicly available at https://drive.google.com/file/d/1lG1Upn6yi-N6tYpEHAt6dfR1uhzNtWbT/view
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