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arXiv 2108.02530cs.RO
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自动驾驶车辆在存在遮挡因素的情况下的可解释目标识别

Interpretable Goal Recognition in the Presence of Occluded Factors for Autonomous Vehicles

Five AI Ltd.(Five AI有限公司);University of Edinburgh(爱丁堡大学);University of Wisconsin–Madison(威斯康星大学麦迪逊分校);University of Oxford(牛津大学)

Josiah P. Hanna, Arrasy Rahman, Elliot Fosong, Francisco Eiras, Mihai Dobre, John Redford, Subramanian Ramamoorthy, Stefano V. Albrecht

摘要:

识别被观察车辆的目标或意图是预测自动驾驶场景中其他智能体未来长期行为的关键一步。当场景中存在看不见的障碍物或被遮挡的车辆时,目标识别可能会被这些看不见的实体对所观察到的车辆的行为的影响所混淆。现有的预测算法假设相对于推断的目标的理性行为可能无法做出准确的长期预测,因为它们忽略了行为受到这种看不见的实体影响的可能性。我们介绍了目标和闭塞因素推理(GOFI)算法,该算法基于反向规划推理,共同推断出目标和潜在闭塞因素的概率信念。然后,我们将展示如何将这些信念集成到蒙特卡罗树搜索(MCTS)。我们证明,共同推断的目标和闭塞的因素,导致更准确的信念,相对于真实的世界状态,并允许代理安全地浏览几个场景,其他基线采取不安全的行动,导致碰撞。

英文摘要:

Recognising the goals or intentions of observed vehicles is a key step towards predicting the long-term future behaviour of other agents in an autonomous driving scenario. When there are unseen obstacles or occluded vehicles in a scenario, goal recognition may be confounded by the effects of these unseen entities on the behaviour of observed vehicles. Existing prediction algorithms that assume rational behaviour with respect to inferred goals may fail to make accurate long-horizon predictions because they ignore the possibility that the behaviour is influenced by such unseen entities. We introduce the Goal and Occluded Factor Inference (GOFI) algorithm which bases inference on inverse-planning to jointly infer a probabilistic belief over goals and potential occluded factors. We then show how these beliefs can be integrated into Monte Carlo Tree Search (MCTS). We demonstrate that jointly inferring goals and occluded factors leads to more accurate beliefs with respect to the true world state and allows an agent to safely navigate several scenarios where other baselines take unsafe actions leading to collisions.

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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