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arXiv · 2503.14430

Joint Image-Instance Spatial-Temporal Attention for Few-shot Action Recognition

Zefeng Qian·Chongyang Zhang·Yifei Huang·Gang Wang·Jiangyong Ying
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Abstract

Few-shot Action Recognition (FSAR) constitutes a crucial challenge in computer vision, entailing the recognition of actions from a limited set of examples. Recent approaches mainly focus on employing image-level features to construct temporal dependencies and generate prototypes for each action category. However, a considerable number of these methods utilize mainly image-level features that incorporate background noise and focus insufficiently on real foreground (action-related instances), thereby compromising the recognition capability, particularly in the few-shot scenario. To tackle this issue, we propose a novel joint Image-Instance level Spatial-temporal attention approach (I2ST) for Few-shot Action Recognition. The core concept of I2ST is to perceive the action-related instances and integrate them with image features via spatial-temporal attention. Specifically, I2ST consists of two key components: Action-related Instance Perception and Joint Image-Instance Spatial-temporal Attention. Given the basic representations from the feature extractor, the Action-related Instance Perception is introduced to perceive action-related instances under the guidance of a text-guided segmentation model. Subsequently, the Joint Image-Instance Spatial-temporal Attention is used to construct the feature dependency between instances and images...

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Zefeng Qian, Chongyang Zhang, Yifei Huang, Gang Wang, Jiangyong Ying. 2025-03-11. Joint Image-Instance Spatial-Temporal Attention for Few-shot Action Recognition. https://doi.org/10.1016/j.cviu.2025.104322

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