arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.02636cs.CVcs.AIcs.LGcs.ROstat.ML
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先验知识在精确多峰预测中的重要性

The Importance of Prior Knowledge in Precise Multimodal Prediction

Uber Advanced Technologies Group(优步先进技术集团);University of Toronto(多伦多大学)

Sergio Casas, Cole Gulino, Simon Suo, Raquel Urtasun

摘要:

道路具有明确定义的几何形状、拓扑结构和交通规则。虽然这已被广泛利用的运动规划方法,以产生遵守法律的演习,很少的工作一直致力于利用这些先验的感知和运动预测方法。在本文中,我们建议将这些结构化的先验作为一个损失函数。与强加硬约束相比,这种方法允许模型在现实世界中发生不合规机动时处理这些机动。安全的运动规划是最终目标,因此场景的可能未来发展的概率表征是选择具有最低预期成本的规划的关键。为了实现这一目标,我们设计了一个框架,利用REINFORCE将不可微的先验样本轨迹从概率模型,从而优化整个分布。我们证明了我们的方法在包含复杂道路拓扑和多智能体交互的真实自动驾驶数据集上的有效性。我们的运动预测不仅表现出更好的精度和地图理解能力,而且最重要的是,我们的自动驾驶汽车可以采取更安全的运动计划。我们强调,尽管这种评估的重要性,它往往被忽视了以前的感知和运动预测工作。

英文摘要:

Roads have well defined geometries, topologies, and traffic rules. While this has been widely exploited in motion planning methods to produce maneuvers that obey the law, little work has been devoted to utilize these priors in perception and motion forecasting methods. In this paper we propose to incorporate these structured priors as a loss function. In contrast to imposing hard constraints, this approach allows the model to handle non-compliant maneuvers when those happen in the real world. Safe motion planning is the end goal, and thus a probabilistic characterization of the possible future developments of the scene is key to choose the plan with the lowest expected cost. Towards this goal, we design a framework that leverages REINFORCE to incorporate non-differentiable priors over sample trajectories from a probabilistic model, thus optimizing the whole distribution. We demonstrate the effectiveness of our approach on real-world self-driving datasets containing complex road topologies and multi-agent interactions. Our motion forecasts not only exhibit better precision and map understanding, but most importantly result in safer motion plans taken by our self-driving vehicle. We emphasize that despite the importance of this evaluation, it has been often overlooked by previous perception and motion forecasting works.

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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