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Poster

Trajectory-aligned Space-time Tokens for Few-shot Action Recognition

Pulkit Kumar · Namitha Padmanabhan · Luke Luo · Sai Saketh Rambhatla · Abhinav Shrivastava

Strong blind review: This paper was not made available on public preprint services during the review process Strong Double Blind
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Thu 3 Oct 1:30 a.m. PDT — 3:30 a.m. PDT

Abstract:

We propose a simple yet effective approach for few-shot action recognition, emphasizing the disentanglement of motion and appearance representations. By harnessing recent progress in tracking, specifically point trajectories, and self-supervised representation learning, we build trajectory-aligned tokens (TATs) that capture motion and appearance information. This approach significantly reduces the data requirements while retaining essential information. To process these representations, we use a Masked Space-time Transformer that effectively learns to aggregate information to facilitate few-shot action recognition. We demonstrate state-of-the-art results on few-shot action recognition across multiple datasets.

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