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arXiv 2311.02007cs.CVcs.RO
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面向激光雷达点云的无监督目标检测

Towards Unsupervised Object Detection From LiDAR Point Clouds

Waabi;University of Toronto(多伦多大学);New York University(纽约大学)

Lunjun Zhang, Anqi Joyce Yang, Yuwen Xiong, Sergio Casas, Bin Yang, Mengye Ren, Raquel Urtasun

AI总结:

该研究针对自动驾驶场景3D点云无监督目标检测问题,提出OYSTER方法,结合点聚类、时序一致性等机制实现零样本检测与自提升,还提出新型感知指标,在相关数据集上性能优于现有无监督基线。

摘要:

本文研究自动驾驶场景下3D点云的无监督目标检测问题。我们提出了一种简单而有效的方法,该方法利用了四个要点:(i)点云密集的近距区域内的点聚类;(ii)用于过滤含噪无监督检测结果的时序一致性;(iii)将自动标注扩展到远距范围的CNN(卷积神经网络)平移等变性;(iv)用于实现自我提升的自监督机制。我们的方法OYSTER(即通过时空精化的目标发现)不对数据采集施加约束(例如同一位置的重复遍历),能够在无需监督微调的情况下以零样本方式检测目标(即使在稀疏的远距区域也可实现),并且在更多轮迭代自训练下能够持续自我提升。为了更好地衡量自动驾驶场景下的模型性能,我们提出了一种基于碰撞距离的、以规划为中心的新型感知指标。我们证明,我们的无监督目标检测器在PandaSet和Argoverse 2 Sensor数据集上的性能显著优于无监督基线方法,表明自监督与目标先验的结合有望在真实场景中实现目标发现。更多信息请访问项目网站:https://waabi.ai/research/oyster

英文摘要:

In this paper, we study the problem of unsupervised object detection from 3D point clouds in self-driving scenes. We present a simple yet effective method that exploits (i) point clustering in near-range areas where the point clouds are dense, (ii) temporal consistency to filter out noisy unsupervised detections, (iii) translation equivariance of CNNs to extend the auto-labels to long range, and (iv) self-supervision for improving on its own. Our approach, OYSTER (Object Discovery via Spatio-Temporal Refinement), does not impose constraints on data collection (such as repeated traversals of the same location), is able to detect objects in a zero-shot manner without supervised finetuning (even in sparse, distant regions), and continues to self-improve given more rounds of iterative self-training. To better measure model performance in self-driving scenarios, we propose a new planning-centric perception metric based on distance-to-collision. We demonstrate that our unsupervised object detector significantly outperforms unsupervised baselines on PandaSet and Argoverse 2 Sensor dataset, showing promise that self-supervision combined with object priors can enable object discovery in the wild. For more information, visit the project website: https://waabi.ai/research/oyster

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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