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arXiv 1802.02202cs.CVcs.RO
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使用深度学习和自动标签生成的动态占用栅格地图上的目标检测

Object Detection on Dynamic Occupancy Grid Maps Using Deep Learning and Automatic Label Generation

Ulm University(乌尔姆大学)

Stefan Hoermann, Philipp Henzler, Martin Bach, Klaus Dietmayer

摘要:

我们解决的问题,目标检测和姿态估计在一个共享的空间市中心的环境。对于感知,将具有360°覆盖范围的多个激光扫描仪融合在动态占用网格图(DOGMa)中。训练单级深度卷积神经网络以从单个输入DOGMa提供包括形状、位置、取向和存在分数的对象假设。此外,开发了一种离线对象提取算法,用于自动标记数小时的训练数据。该算法是基于一个两遍轨迹提取,向前和向后的时间。典型的工程算法,自动标签生成遭受误检测,这使得硬负挖掘不切实际。因此,我们提出了一个损失函数,以抵消大多数静态背景和极其罕见的动态网格单元之间的高度不平衡。实验表明,训练后的网络具有良好的泛化能力,因为它检测到偶尔丢失的标签算法的对象。评估达到75.9%的平均精度(AP)

英文摘要:

We tackle the problem of object detection and pose estimation in a shared space downtown environment. For perception multiple laser scanners with 360° coverage were fused in a dynamic occupancy grid map (DOGMa). A single-stage deep convolutional neural network is trained to provide object hypotheses comprising of shape, position, orientation and an existence score from a single input DOGMa. Furthermore, an algorithm for offline object extraction was developed to automatically label several hours of training data. The algorithm is based on a two-pass trajectory extraction, forward and backward in time. Typical for engineered algorithms, the automatic label generation suffers from misdetections, which makes hard negative mining impractical. Therefore, we propose a loss function counteracting the high imbalance between mostly static background and extremely rare dynamic grid cells. Experiments indicate, that the trained network has good generalization capabilities since it detects objects occasionally lost by the label algorithm. Evaluation reaches an average precision (AP) of 75.9%

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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