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Fine-grained action recognition is attracting increasing attention due to the emerging demand of specific action understanding in real-world applications, whereas the data of rare fine-grained categories is very limited. Therefore, we…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Jiahao Wang , Yunhong Wang , Sheng Liu , Annan Li

Few-shot action recognition (FSAR) aims to recognize novel action categories with few exemplars. Existing methods typically learn frame-level representations for each video by designing inter-frame temporal modeling strategies or…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Hongyu Qu , Ling Xing , Jiachao Zhang , Rui Yan , Yazhou Yao , Xiangbo Shu

Recent few-shot action recognition (FSAR) methods typically perform semantic matching on learned discriminative features to achieve promising performance. However, most FSAR methods focus on single-scale (e.g., frame-level, segment-level,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-06 Hongyu Qu , Rui Yan , Xiangbo Shu , Hailiang Gao , Peng Huang , Guo-Sen Xie

Accurately detecting student behavior from classroom videos is beneficial for analyzing their classroom status and improving teaching efficiency. However, low accuracy in student classroom behavior detection is a prevalent issue. To address…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Fan Yang

Adapting pre-trained image models to video modality has proven to be an effective strategy for robust few-shot action recognition. In this work, we explore the potential of adapter tuning in image-to-video model adaptation and propose a…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Wenjie Pei , Qizhong Tan , Guangming Lu , Jiandong Tian , Jun Yu

Fine-grained action recognition (FGAR) aims to identify subtle and distinctive differences among fine-grained action categories. However, current recognition methods often capture coarse-grained motion patterns but struggle to identify…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Baoli Sun , Yihan Wang , Xinzhu Ma , Zhihui Wang , Kun Lu , Zhiyong Wang

Prior work in multi-task learning has mainly focused on predictions on a single image. In this work, we present a new approach for multi-task learning from videos via efficient inter-frame local attention (MILA). Our approach contains a…

Computer Vision and Pattern Recognition · Computer Science 2021-10-12 Donghyun Kim , Tian Lan , Chuhang Zou , Ning Xu , Bryan A. Plummer , Stan Sclaroff , Jayan Eledath , Gerard Medioni

Spatial and temporal modeling is one of the most core aspects of few-shot action recognition. Most previous works mainly focus on long-term temporal relation modeling based on high-level spatial representations, without considering the…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Jiazheng Xing , Mengmeng Wang , Yong Liu , Boyu Mu

Few-shot (FS) and zero-shot (ZS) learning are two different approaches for scaling temporal action detection (TAD) to new classes. The former adapts a pretrained vision model to a new task represented by as few as a single video per class,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Sauradip Nag , Mengmeng Xu , Xiatian Zhu , Juan-Manuel Perez-Rua , Bernard Ghanem , Yi-Zhe Song , Tao Xiang

Many few-shot learning models focus on recognising images. In contrast, we tackle a challenging task of few-shot action recognition from videos. We build on a C3D encoder for spatio-temporal video blocks to capture short-range action…

Computer Vision and Pattern Recognition · Computer Science 2020-08-05 Hongguang Zhang , Li Zhang , Xiaojuan Qi , Hongdong Li , Philip H. S. Torr , Piotr Koniusz

Spatio-temporal feature learning is of central importance for action recognition in videos. Existing deep neural network models either learn spatial and temporal features independently (C2D) or jointly with unconstrained parameters (C3D).…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Chao Li , Qiaoyong Zhong , Di Xie , Shiliang Pu

Few-shot learning (FSL) aims to generalize to novel categories with only a few samples. Recent approaches incorporate large language models (LLMs) to enrich visual representations with semantic embeddings derived from class names. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-25 Wenhao Li , Xianjing Meng , Qiangchang Wang , Zhongyi Han , Zhibin Wu , Yilong Yin

Few-shot video action recognition is an effective approach to recognizing new categories with only a few labeled examples, thereby reducing the challenges associated with collecting and annotating large-scale video datasets. Existing…

Computer Vision and Pattern Recognition · Computer Science 2023-09-18 Sarinda Samarasinghe , Mamshad Nayeem Rizve , Navid Kardan , Mubarak Shah

Weakly supervised temporal action localization (WSTAL) aims to localize actions in untrimmed videos using video-level labels. Despite recent advances, existing approaches mainly follow a localization-by-classification pipeline, generally…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Songchun Zhang , Chunhui Zhao

Few-shot action recognition (FSAR) aims to learn a model capable of identifying novel actions in videos using only a few examples. In assuming the base dataset seen during meta-training and novel dataset used for evaluation can come from…

Computer Vision and Pattern Recognition · Computer Science 2024-06-04 Georgia Markham , Mehala Balamurali , Andrew J. Hill

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…

Computer Vision and Pattern Recognition · Computer Science 2024-07-26 Pulkit Kumar , Namitha Padmanabhan , Luke Luo , Sai Saketh Rambhatla , Abhinav Shrivastava

Few-shot learning is devoted to training a model on few samples. Most of these approaches learn a model based on a pixel-level or global-level feature representation. However, using global features may lose local information, and using…

Computer Vision and Pattern Recognition · Computer Science 2021-12-07 Haoxing Chen , Huaxiong Li , Yaohui Li , Chunlin Chen

There is significant progress in recognizing traditional human activities from videos focusing on highly distinctive actions involving discriminative body movements, body-object and/or human-human interactions. Driver's activities are…

Computer Vision and Pattern Recognition · Computer Science 2021-01-19 Zachary Wharton , Ardhendu Behera , Yonghuai Liu , Nik Bessis

Existing meta-learning based few-shot learning (FSL) methods typically adopt an episodic training strategy whereby each episode contains a meta-task. Across episodes, these tasks are sampled randomly and their relationships are ignored. In…

Machine Learning · Computer Science 2020-09-29 Nanyi Fei , Zhiwu Lu , Yizhao Gao , Jia Tian , Tao Xiang , Ji-Rong Wen

Thanks to capability to alleviate the cost of large-scale annotation, few-shot action recognition (FSAR) has attracted increased attention of researchers in recent years. Existing FSAR approaches typically neglect the role of individual…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Zilin Gao , Qilong Wang , Bingbing Zhang , Qinghua Hu , Peihua Li