论文标题
基于高分辨率事件的高速公路检测和跟踪
High-temporal-resolution event-based vehicle detection and tracking
论文作者
论文摘要
近年来,基于事件的视力一直在迅速增长,这是由于其较高的时间分辨率(〜1US),高动态范围(> 120dB)和输出延迟仅为几微秒的独特特征。这项工作进一步探讨了一种混合,多模式的方法,用于对象检测和跟踪,该方法利用基于手工的事件方法补充的基于最先进的框架的检测器,以最小的计算架空开销来改善整体跟踪性能。介绍的方法包括基于事件的边界框(BB)改进,以提高所得BBS的精度以及基于事件的对象检测方法,以恢复错过的检测并生成框架间检测,从而启用高速分辨率跟踪输出。这些方法的优点是通过使用高阶跟踪准确性(HOTA)度量的消融研究来定量验证的。结果表明,对于事件和基于边缘的掩码构型,在24Hz的基线帧率上,对于事件和基于边缘的掩码配置而言,HOTA从仅使用框架的56.6%提高了56.6%的性能增长。同样,将这些方法与相同的配置合并,将HOTA从52.5%提高到63.1%,并从384Hz的高速分辨率跟踪率下从51.3%提高到60.2%。最后,进行了验证实验,以使用高速雷达分析现实世界的单对象跟踪性能。经验证据表明,与在24Hz的基线帧率上使用基于框架的对象检测器相比,我们的方法具有显着优势,高达500Hz的较高跟踪速率。
Event-based vision has been rapidly growing in recent years justified by the unique characteristics it presents such as its high temporal resolutions (~1us), high dynamic range (>120dB), and output latency of only a few microseconds. This work further explores a hybrid, multi-modal, approach for object detection and tracking that leverages state-of-the-art frame-based detectors complemented by hand-crafted event-based methods to improve the overall tracking performance with minimal computational overhead. The methods presented include event-based bounding box (BB) refinement that improves the precision of the resulting BBs, as well as a continuous event-based object detection method, to recover missed detections and generate inter-frame detections that enable a high-temporal-resolution tracking output. The advantages of these methods are quantitatively verified by an ablation study using the higher order tracking accuracy (HOTA) metric. Results show significant performance gains resembled by an improvement in the HOTA from 56.6%, using only frames, to 64.1% and 64.9%, for the event and edge-based mask configurations combined with the two methods proposed, at the baseline framerate of 24Hz. Likewise, incorporating these methods with the same configurations has improved HOTA from 52.5% to 63.1%, and from 51.3% to 60.2% at the high-temporal-resolution tracking rate of 384Hz. Finally, a validation experiment is conducted to analyze the real-world single-object tracking performance using high-speed LiDAR. Empirical evidence shows that our approaches provide significant advantages compared to using frame-based object detectors at the baseline framerate of 24Hz and higher tracking rates of up to 500Hz.