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arXiv 2412.03136cs.RO
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使用统一高斯过程回归框架的异步事件-惯性里程计

Asynchronous Event-Inertial Odometry using a Unified Gaussian Process Regression Framework

Northwestern Polytechnical University(西北工业大学);School of Astronautics, Northwestern Polytechnical University(西北工业大学航天学院);School of Automation, Northwestern Polytechnical University(西北工业大学自动化学院);School of Electronic and Information Engineering, Beijing Jiaotong University(北京交通大学电子信息工程学院)

Xudong Li, Zhixiang Wang, Zihao Liu, Yizhai Zhang, Fan Zhang, Xiuming Yao, Panfeng Huang

AI总结:

本文提出统一高斯过程回归框架下的异步事件-惯性里程计,利用GP潜变量模型构建运动先验并紧耦合异步特征关联与惯性测量,通过滑动窗口因子图求解,实验证明其精度与最先进同步方案相当。

摘要:

近期研究已结合单目事件相机与惯性测量单元来估计SE(3)轨迹。然而,事件相机的异步性给传统融合算法带来了巨大挑战。本文提出了一种统一高斯过程(GP)回归框架下的异步事件-惯性里程计,以自然融合异步数据关联与惯性测量。利用GP潜变量模型构建数据驱动的运动先验,并获得解析积分能力。随后,基于异步事件的特征关联与积分伪测量在同一GP框架下紧耦合。接着,该融合估计问题通过滑动窗口方式下的底层因子图求解。考虑稀疏性,那些历史状态被有序边缘化。同时设计了一个孪生系统用于对比,其中将传统惯性预积分方案嵌入基于GP的框架中,以替代GP潜变量模型。在公开事件-惯性数据集上的评估验证了两个系统的有效性。对比实验表明,其精度与最先进的同步方案相比具有竞争力。

英文摘要:

Recent works have combined monocular event camera and inertial measurement unit to estimate the $SE(3)$ trajectory. However, the asynchronicity of event cameras brings a great challenge to conventional fusion algorithms. In this paper, we present an asynchronous event-inertial odometry under a unified Gaussian Process (GP) regression framework to naturally fuse asynchronous data associations and inertial measurements. A GP latent variable model is leveraged to build data-driven motion prior and acquire the analytical integration capacity. Then, asynchronous event-based feature associations and integral pseudo measurements are tightly coupled using the same GP framework. Subsequently, this fusion estimation problem is solved by underlying factor graph in a sliding-window manner. With consideration of sparsity, those historical states are marginalized orderly. A twin system is also designed for comparison, where the traditional inertial preintegration scheme is embedded in the GP-based framework to replace the GP latent variable model. Evaluations on public event-inertial datasets demonstrate the validity of both systems. Comparison experiments show competitive precision compared to the state-of-the-art synchronous scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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