arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2210.04543cs.CV
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基于稀疏语义地图的交通场景单目定位

Sparse Semantic Map-Based Monocular Localization in Traffic Scenes Using Learned 2D-3D Point-Line Correspondences

Xi’an Jiaotong University(西安交通大学)

Xingyu Chen, Jianru Xue, Shanmin Pang

摘要:

在先验地图中基于视觉的定位对于自主车辆至关重要。给定一幅查询图像,目标是估计出与先验图对应的摄像机姿态,关键是摄像机图像在先验图中的配准问题。当自动驾驶车辆在道路上在遮挡下行驶时(例如,汽车、公共汽车、卡车)和变化的环境外观(例如,照明变化、季节变化),现有方法严重依赖于特征级的密集点描述符来解决配准问题,从而使特征与外观和遮挡纠缠在一起。因此,他们经常无法估计正确的姿势。为了解决这些问题,我们提出了一种基于稀疏语义地图的单目定位方法,该方法通过设计良好的深度神经网络解决了2D-3D配准问题。给定由简化元素组成的稀疏语义图(例如,杆线、交通标志中点),然后通过学习来自图像的2D语义元素与来自稀疏语义地图的3D元素之间的对应特征来估计相机姿态。所提出的基于稀疏语义地图的定位方法对环境中的遮挡和长期外观变化具有鲁棒性。大量的实验结果表明,该方法优于国家的最先进的方法。

英文摘要:

Vision-based localization in a prior map is of crucial importance for autonomous vehicles. Given a query image, the goal is to estimate the camera pose corresponding to the prior map, and the key is the registration problem of camera images within the map. While autonomous vehicles drive on the road under occlusion (e.g., car, bus, truck) and changing environment appearance (e.g., illumination changes, seasonal variation), existing approaches rely heavily on dense point descriptors at the feature level to solve the registration problem, entangling features with appearance and occlusion. As a result, they often fail to estimate the correct poses. To address these issues, we propose a sparse semantic map-based monocular localization method, which solves 2D-3D registration via a well-designed deep neural network. Given a sparse semantic map that consists of simplified elements (e.g., pole lines, traffic sign midpoints) with multiple semantic labels, the camera pose is then estimated by learning the corresponding features between the 2D semantic elements from the image and the 3D elements from the sparse semantic map. The proposed sparse semantic map-based localization approach is robust against occlusion and long-term appearance changes in the environments. Extensive experimental results show that the proposed method outperforms the state-of-the-art approaches.

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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