论文标题

评估弱监督的行动分割方法

On Evaluating Weakly Supervised Action Segmentation Methods

论文作者

Souri, Yaser, Richard, Alexander, Minciullo, Luca, Gall, Juergen

论文摘要

动作分割是时间分割未修剪视频的每一帧的任务。弱监督的行动细分方法,尤其是笔录中的计算机视觉社区引起了极大的兴趣。在这项工作中,我们专注于经常被忽略的弱监督动作细分方法的使用和评估的两个方面:多次训练运行的性能差异以及为此任务选择功能提取器的影响。为了解决第一个问题,我们在早餐数据集中训练每种方法5次,并提供结果的平均和标准偏差。我们的实验表明,这些重复的标准偏差在1%至2.5%之间,并显着影响不同方法之间的比较。此外,我们对特征提取的研究表明,对于研究的弱监督行动分割方法,高级I3D功能的性能比经典的IDT功能差。

Action segmentation is the task of temporally segmenting every frame of an untrimmed video. Weakly supervised approaches to action segmentation, especially from transcripts have been of considerable interest to the computer vision community. In this work, we focus on two aspects of the use and evaluation of weakly supervised action segmentation approaches that are often overlooked: the performance variance over multiple training runs and the impact of selecting feature extractors for this task. To tackle the first problem, we train each method on the Breakfast dataset 5 times and provide average and standard deviation of the results. Our experiments show that the standard deviation over these repetitions is between 1 and 2.5% and significantly affects the comparison between different approaches. Furthermore, our investigation on feature extraction shows that, for the studied weakly-supervised action segmentation methods, higher-level I3D features perform worse than classical IDT features.

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