arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.14826cs.RO
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基于语义边缘对齐的紧凑3D地图单目定位

Compact 3D Map-Based Monocular Localization Using Semantic Edge Alignment

Alibaba A.I. Labs(阿里巴巴人工智能实验室)

Kejie Qiu, Shenzhou Chen, Jiahui Zhang, Rui Huang, Le Cui, Siyu Zhu, Ping Tan

摘要:

精确定位是导航、机器人、自动驾驶和增强现实(AR)等各种应用的基础。与增量定位不同,全局定位没有误差累积引起的漂移,这在许多应用场景中是期望的。除了在户外使用的GPS之外,3D地图也被广泛用作替代全球定位参考。在本文中,我们提出了一个紧凑的三维地图为基础的全球定位系统,使用低成本的单目相机和惯性测量单元(IMU)。该紧凑地图由两种类型的简化元素和多个语义标签组成,能够很好地适应城市环境等各种人造环境。此外,语义边缘特征用于关键的图像地图配准,这是强大的对环境中的遮挡和长期的外观变化。为了进一步提高定位性能,关键的语义边缘对齐制定为一个优化问题的基础上预测的初始姿态由一个独立的VIO(视觉惯性里程计)模块。定位系统采用模块化设计,实现了实时的。我们通过与地面实况的对比实验来评估定位精度,并展示了长期定位性能。

英文摘要:

Accurate localization is fundamental to a variety of applications, such as navigation, robotics, autonomous driving, and Augmented Reality (AR). Different from incremental localization, global localization has no drift caused by error accumulation, which is desired in many application scenarios. In addition to GPS used in the open air, 3D maps are also widely used as alternative global localization references. In this paper, we propose a compact 3D map-based global localization system using a low-cost monocular camera and an IMU (Inertial Measurement Unit). The proposed compact map consists of two types of simplified elements with multiple semantic labels, which is well adaptive to various man-made environments like urban environments. Also, semantic edge features are used for the key image-map registration, which is robust against occlusion and long-term appearance changes in the environments. To further improve the localization performance, the key semantic edge alignment is formulated as an optimization problem based on initial poses predicted by an independent VIO (Visual-Inertial Odometry) module. The localization system is realized with modular design in real time. We evaluate the localization accuracy through real-world experimental results compared with ground truth, long-term localization performance is also demonstrated.

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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