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arXiv 1904.01293cs.CV
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基于运动补偿的事件运动分割

Event-Based Motion Segmentation by Motion Compensation

Monash University(莫纳什大学);ETH Zurich(苏黎世联邦理工学院)

Timo Stoffregen, Guillermo Gallego, Tom Drummond, Lindsay Kleeman, Davide Scaramuzza

AI总结:

提出首个基于事件运动补偿的按事件分割方法,通过最大化目标函数联合估计事件与物体的关联及运动参数,在公开数据集上性能比现有最优方法高出达10%。

摘要:

与传统相机像素具有共同曝光时间不同,事件相机是新型仿生传感器,其像素独立工作并以微秒级分辨率异步输出强度变化(称为“事件”)。由于事件由物体的表观运动引起,事件相机基于场景动态采样视觉信息,因此比传统相机更适合捕捉运动,尤其是在传统相机易产生运动模糊的高速场景下。然而,区分由不同运动物体和相机自运动引起的事件是一项具有挑战性的任务。我们提出了首个按事件分割的方法,用于将场景分割为独立运动的物体。该方法通过最大化一个基于近期事件运动补偿研究成果的目标函数,联合估计事件与物体的关联(即分割)以及物体(或背景)的运动参数。我们在公开数据集上对该方法进行了全面评估,性能比现有最优方法高出达10%。我们还展示了首个事件相机分割算法的定量评估结果,在4像素相对位移下达到约90%的准确率。

英文摘要:

In contrast to traditional cameras, whose pixels have a common exposure time, event-based cameras are novel bio-inspired sensors whose pixels work independently and asynchronously output intensity changes (called "events"), with microsecond resolution. Since events are caused by the apparent motion of objects, event-based cameras sample visual information based on the scene dynamics and are, therefore, a more natural fit than traditional cameras to acquire motion, especially at high speeds, where traditional cameras suffer from motion blur. However, distinguishing between events caused by different moving objects and by the camera's ego-motion is a challenging task. We present the first per-event segmentation method for splitting a scene into independently moving objects. Our method jointly estimates the event-object associations (i.e., segmentation) and the motion parameters of the objects (or the background) by maximization of an objective function, which builds upon recent results on event-based motion-compensation. We provide a thorough evaluation of our method on a public dataset, outperforming the state-of-the-art by as much as 10%. We also show the first quantitative evaluation of a segmentation algorithm for event cameras, yielding around 90% accuracy at 4 pixels relative displacement.

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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