论文标题

标签安装错误的随机建模,用于强大的基于字体标签的视觉惯用定位

Stochastic Modeling of Tag Installation Error for Robust On-Manifold Tag-Based Visual-Inertial Localization

论文作者

Kayhani, Navid, McCabe, Brenda, Schoellig, Angela P.

论文摘要

包括无人驾驶汽车(UAV)在内的自动移动机器人因其在建筑中的应用而受到了极大的关注。这些平台具有巨大的潜力,可以自动化和增强许多任务所需数据的质量和频率,例如施工时间表更新,检查和监视。强大的本地化是可靠部署自动机器人平台的关键推动力。自动化的机器人解决方案主要依靠全球定位系统(GPS)进行户外定位。但是,GPS信号在室内被拒绝,并且经常使用预建的环境图用于室内定位。这需要通过对环境中的移动机器人进行远程操作来产生高质量的地图。这种方法不仅耗时且乏味,而且在室内建筑环境中也不可靠。布局随着施工的进度而变化,需要频繁的映射会话以支持自主任务。此外,依赖视觉特征的基于视觉解决方案的有效性在现场低质地和重复区域都受到了很大的影响。为了应对这些挑战,我们以前提出了使用Apriltags的低成本,轻巧的基于标签的视觉惯用定位方法。在这种方法中,标签是具有已知尺寸和位置的纸张可打印地标,代表环境的准图。由于标签放置/替换是一个手动过程,因此会遭受人体错误。在这项工作中,我们研究了人体错误在手动标签安装过程中的影响,并提出了一种随机方法,以使用谎言组理论来解决这种不确定性。使用蒙特卡洛模拟,我们通过实验表明,在我们的盛放配方中纳入的拟议随机模型提高了基于标签的定位对在现场手动标签安装中不可避免的瑕疵的鲁棒性和准确性。

Autonomous mobile robots, including unmanned aerial vehicles (UAVs), have received significant attention for their applications in construction. These platforms have great potential to automate and enhance the quality and frequency of the required data for many tasks such as construction schedule updating, inspections, and monitoring. Robust localization is a critical enabler for reliable deployments of autonomous robotic platforms. Automated robotic solutions rely mainly on the global positioning system (GPS) for outdoor localization. However, GPS signals are denied indoors, and pre-built environment maps are often used for indoor localization. This entails generating high-quality maps by teleoperating the mobile robot in the environment. Not only is this approach time-consuming and tedious, but it also is unreliable in indoor construction settings. Layout changes with construction progress, requiring frequent mapping sessions to support autonomous missions. Moreover, the effectiveness of vision-based solutions relying on visual features is highly impacted in low texture and repetitive areas on site. To address these challenges, we previously proposed a low-cost, lightweight tag-based visual-inertial localization method using AprilTags. Tags, in this method, are paper printable landmarks with known sizes and locations, representing the environment's quasi-map. Since tag placement/replacement is a manual process, it is subject to human errors. In this work, we study the impact of human error in the manual tag installation process and propose a stochastic approach to account for this uncertainty using the Lie group theory. Employing Monte Carlo simulation, we experimentally show that the proposed stochastic model incorporated in our on-manifold formulation improves the robustness and accuracy of tag-based localization against inevitable imperfections in manual tag installation on site.

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