仅用几张地标图和动作指令,机器人就能在新环境自主导航。
Hierarchical end-to-end autonomous navigation through few-shot waypoint detection
- 通过元学习实现少样本地标的端到端识别与导航决策。
- 仅需少数几张图片即可完成新环境的路径规划与执行。
- 适合快速部署于陌生场景的移动机器人导航任务。
人类导航依赖将动作与地标关联,利用对环境显著特征的识别能力,因此导航指令可极为简洁,所需记忆少且不依赖复杂高精度导航工具。相比之下,当前自主导航系统依赖精确定位设备、算法及大量环境感知数据。受人类这一能力启发,并针对技术差距,本文提出一种分层端到端元学习方案,使移动机器人在仅提供少量地标图像及其对应高层导航动作的情况下,即可在未知环境中完成自主导航。该方法大幅简化寻路流程,实现对新环境的快速适应。针对少样本目标点检测,采用基于度量的元学习技术,通过分布嵌入实现。目标点检测触发多任务底层控制模块,执行相应高层导航动作。我们在小型自主车辆上验证了该方案在多个未见过的室内环境中的有效性。
原文摘要 · Abstract (English)
Human navigation is facilitated through the association of actions with landmarks, tapping into our ability to recognize salient features in our environment. Consequently, navigational instructions for humans can be extremely concise, such as short verbal descriptions, indicating a small memory requirement and no reliance on complex and overly accurate navigation tools. Conversely, current autonomous navigation schemes rely on accurate positioning devices and algorithms as well as extensive streams of sensory data collected from the environment. Inspired by this human capability and motivated by the associated technological gap, in this work we propose a hierarchical end-to-end meta-learning scheme that enables a mobile robot to navigate in a previously unknown environment upon presentation of only a few sample images of a set of landmarks along with their corresponding high-level navigation actions. This dramatically simplifies the wayfinding process and enables easy adoption to new environments. For few-shot waypoint detection, we implement a metric-based few-shot learning technique through distribution embedding. Waypoint detection triggers the multi-task low-level maneuver controller module to execute the corresponding high-level navigation action. We demonstrate the effectiveness of the scheme using a small-scale autonomous vehicle on novel indoor navigation tasks in several previously unseen environments.
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