Abstract
The existing research in action recognition is mostly focused on high-quality
videos where the action is distinctly visible. In real-world surveillance
environments, the actions in videos are captured at a wide range of
resolutions. Most activities occur at a distance with a small resolution and
recognizing such activities is a challenging problem. In this work, we focus on
recognizing tiny actions in videos. We introduce a benchmark dataset,
TinyVIRAT, which contains natural low-resolution activities. The actions in
TinyVIRAT videos have multiple labels and they are extracted from surveillance
videos which makes them realistic and more challenging. We propose a novel
method for recognizing tiny actions in videos which utilizes a progressive
generative approach to improve the quality of low-resolution actions. The
proposed method also consists of a weakly trained attention mechanism which
helps in focusing on the activity regions in the video. We perform extensive
experiments to benchmark the proposed TinyVIRAT dataset and observe that the
proposed method significantly improves the action recognition performance over
baselines. We also evaluate the proposed approach on synthetically resized
action recognition datasets and achieve state-of-the-art results when compared
with existing methods. The dataset and code is publicly available at
https://github.com/UgurDemir/Tiny-VIRAT.
Citation
ID:
282447
Ref Key:
shah2020tinyvirat