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arXiv 2201.04022cs.CV
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压缩视频序列到一个信息帧的方法

Condensing a Sequence to One Informative Frame for Video Recognition

JD AI Research(京东人工智能研究院);Singapore Management University(新加坡管理大学)

Zhaofan Qiu, Ting Yao, Yan Shu, Chong-Wah Ngo, Tao Mei

摘要:

视频是复杂的,因为运动的变化很大,并且内容丰富,视觉细节很细。从这样的信息密集型媒体中提取有用的信息需要穷尽的计算资源。本文研究了一个两步的替代方案,首先压缩的视频序列的信息“帧”,然后利用现成的图像识别系统的合成帧。一个有效的问题是如何定义“有用信息”,然后将其从视频序列中提取到一个合成帧。本文提出了一种新的信息帧合成(IFS)架构,它包括三个目标任务,即,外观重建、视频分类、运动估计和两个正则化器,即,对抗性学习颜色一致性每个任务为合成帧配备一个能力,而每个正则化器增强其视觉质量。利用这些,通过以端到端的方式联合学习帧合成,期望所生成的帧封装对视频分析有用的所需时空信息。在大规模Kinetics数据集上进行了大量实验。当与将视频序列映射到单个图像的基线方法相比时,IFS显示出优越的性能。更值得注意的是,IFS在基于图像的2D网络和基于剪辑的3D网络上始终表现出明显的改进,并以更少的计算成本实现了与最先进方法相当的性能。

英文摘要:

Video is complex due to large variations in motion and rich content in fine-grained visual details. Abstracting useful information from such information-intensive media requires exhaustive computing resources. This paper studies a two-step alternative that first condenses the video sequence to an informative "frame" and then exploits off-the-shelf image recognition system on the synthetic frame. A valid question is how to define "useful information" and then distill it from a video sequence down to one synthetic frame. This paper presents a novel Informative Frame Synthesis (IFS) architecture that incorporates three objective tasks, i.e., appearance reconstruction, video categorization, motion estimation, and two regularizers, i.e., adversarial learning, color consistency. Each task equips the synthetic frame with one ability, while each regularizer enhances its visual quality. With these, by jointly learning the frame synthesis in an end-to-end manner, the generated frame is expected to encapsulate the required spatio-temporal information useful for video analysis. Extensive experiments are conducted on the large-scale Kinetics dataset. When comparing to baseline methods that map video sequence to a single image, IFS shows superior performance. More remarkably, IFS consistently demonstrates evident improvements on image-based 2D networks and clip-based 3D networks, and achieves comparable performance with the state-of-the-art methods with less computational cost.

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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