论文标题

事件流中长期寿命的准确关键点

Long-Lived Accurate Keypoints in Event Streams

论文作者

Chiberre, Philippe, Perot, Etienne, Sironi, Amos, Lepetit, Vincent

论文摘要

我们提出了一种新颖的端到端方法,可在事件流中进行关键点检测和跟踪,该方法比以前的方法提供了更好的精度和更长的关键点轨道。两种贡献共同努力使这成为可能。 首先,我们提出了一个简单的过程,以生成稳定的关键点标签,我们用来训练经常性体系结构。该培训数据导致检测随着时间的推移非常一致。 此外,我们观察到以前的按键检测方法在表示一段时间内整合事件的表示形式(例如时间表)上工作。由于需要这种集成,因此我们声称最好预测时期关键点的轨迹,而不是单个位置,如先前的方法中所做的那样。我们在整合时间段的一系列热图的形式预测这些轨迹。这可以改善关键点本地化。 我们的体系结构也可以保持非常简单,从而导致很快的推理时间。我们在HVGA ATIS角数据集以及“事件相机数据集和模拟器”数据集上演示了我们的方法,并将其显示为“关键点”轨道长三倍,几乎是最好的先前先前最新方法的两倍。我们认为我们的方法可以推广到其他基于事件的相机问题,并发布我们的源代码以鼓励其他作者探索它。

We present a novel end-to-end approach to keypoint detection and tracking in an event stream that provides better precision and much longer keypoint tracks than previous methods. This is made possible by two contributions working together. First, we propose a simple procedure to generate stable keypoint labels, which we use to train a recurrent architecture. This training data results in detections that are very consistent over time. Moreover, we observe that previous methods for keypoint detection work on a representation (such as the time surface) that integrates events over a period of time. Since this integration is required, we claim it is better to predict the keypoints' trajectories for the time period rather than single locations, as done in previous approaches. We predict these trajectories in the form of a series of heatmaps for the integration time period. This improves the keypoint localization. Our architecture can also be kept very simple, which results in very fast inference times. We demonstrate our approach on the HVGA ATIS Corner dataset as well as "The Event-Camera Dataset and Simulator" dataset, and show it results in keypoint tracks that are three times longer and nearly twice as accurate as the best previous state-of-the-art methods. We believe our approach can be generalized to other event-based camera problems, and we release our source code to encourage other authors to explore it.

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