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From Coarse to Fine: Robust Hierarchical Localization at Large Scale #30

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DeepTecher opened this issue Apr 19, 2019 · 0 comments
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From Coarse to Fine: Robust Hierarchical Localization at Large Scale,定位

提交日期:2019-04-08
团队: 苏黎世联邦理工学院ASL(Autonomous Systems Lab)、Sevensense Robotics AG
作者:Paul-Edouard Sarlin, Cesar Cadena, Roland Siegwart, Marcin Dymczyk

摘要:强大而准确的视觉定位是众多应用的基本功能,例如自动驾驶,移动机器人或增强现实。然而,它仍然是一项具有挑战性的任务,特别是对于大规模环境和存在显着的外观变化。SOTA不仅会遇到这种情况,而且对于某些实时应用来说往往资源过于密集。在本文中,我们提出HF-Net,一种基于单片CNN的分层定位方法,同时预测局部特征和全局描述符,以实现准确的6-DoF定位。我们利用粗到精的定位范例:我们首先执行全局检索以获得位置假设,然后才匹配这些候选位置内的局部特征。这种分层方法可以节省大量的运行时间,使我们的系统适合实时操作。通过利用学习的描述符,我们的方法在大范围的外观变化中实现了显着的定位稳健性,并为大规模定位的两个具有挑战性的基准设置了新的最新技术。

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