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Temporal action localization is an important yet challenging task in video understanding. Typically, such a task aims at inferring both the action category and localization of the start and end frame for each action instance in a long,…

Computer Vision and Pattern Recognition · Computer Science 2021-03-25 Chuming Lin , Chengming Xu , Donghao Luo , Yabiao Wang , Ying Tai , Chengjie Wang , Jilin Li , Feiyue Huang , Yanwei Fu

In this paper, we consider the problem of temporal action localization under low-shot (zero-shot & few-shot) scenario, with the goal of detecting and classifying the action instances from arbitrary categories within some untrimmed videos,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-22 Chen Ju , Zeqian Li , Peisen Zhao , Ya Zhang , Xiaopeng Zhang , Qi Tian , Yanfeng Wang , Weidi Xie

Temporal action detection (TAD) aims to detect the semantic labels and boundaries of action instances in untrimmed videos. Current mainstream approaches are multi-step solutions, which fall short in efficiency and flexibility. In this…

Computer Vision and Pattern Recognition · Computer Science 2022-04-07 Shimin Chen , Chen Chen , Wei Li , Xunqiang Tao , Yandong Guo

Current state-of-the-art human action recognition is focused on the classification of temporally trimmed videos in which only one action occurs per frame. In this work we address the problem of action localisation and instance segmentation…

Computer Vision and Pattern Recognition · Computer Science 2017-08-08 Suman Saha , Gurkirt Singh , Michael Sapienza , Philip H. S. Torr , Fabio Cuzzolin

Existing action detection algorithms usually generate action proposals through an extensive search over the video at multiple temporal scales, which brings about huge computational overhead and deviates from the human perception procedure.…

Computer Vision and Pattern Recognition · Computer Science 2017-06-23 Jingjia Huang , Nannan Li , Tao Zhang , Ge Li

Temporal Action Localization (TAL) task which is to predict the start and end of each action in a video along with the class label of the action has numerous applications in the real world. But due to the complexity of this task, acceptable…

Computer Vision and Pattern Recognition · Computer Science 2022-05-26 Hassan Keshvarikhojasteh , Hoda Mohammadzade , Hamid Behroozi

We present our solution to the BinEgo-360 Challenge at ICCV 2025, which focuses on temporal action localization (TAL) in multi-perspective and multi-modal video settings. The challenge provides a dataset containing panoramic, third-person,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Anh-Kiet Duong , Petra Gomez-Krämer

Temporal action proposal generation (TAPG) aims to estimate temporal intervals of actions in untrimmed videos, which is a challenging yet plays an important role in many tasks of video analysis and understanding. Despite the great…

Computer Vision and Pattern Recognition · Computer Science 2022-03-18 Khoa Vo , Kashu Yamazaki , Sang Truong , Minh-Triet Tran , Akihiro Sugimoto , Ngan Le

The present few-shot temporal action localization model can't handle the situation where videos contain multiple action instances. So the purpose of this paper is to achieve manifold action instances localization in a lengthy untrimmed…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Fengshun Wang , Qiurui Wang , Yuting Wang

Temporal action localization is an important task of computer vision. Though a variety of methods have been proposed, it still remains an open question how to predict the temporal boundaries of action segments precisely. Most works use…

Computer Vision and Pattern Recognition · Computer Science 2017-09-12 Ke Yang , Peng Qiao , Dongsheng Li , Shaohe Lv , Yong Dou

Detecting actions in untrimmed videos is an important yet challenging task. In this paper, we present the structured segment network (SSN), a novel framework which models the temporal structure of each action instance via a structured…

Computer Vision and Pattern Recognition · Computer Science 2017-09-19 Yue Zhao , Yuanjun Xiong , Limin Wang , Zhirong Wu , Xiaoou Tang , Dahua Lin

Temporal action localization (TAL) is a task of identifying a set of actions in a video, which involves localizing the start and end frames and classifying each action instance. Existing methods have addressed this task by using predefined…

Computer Vision and Pattern Recognition · Computer Science 2022-07-22 Tae-Kyung Kang , Gun-Hee Lee , Seong-Whan Lee

Temporal action detection (TAD) is an important yet challenging task in video analysis. Most existing works draw inspiration from image object detection and tend to reformulate it as a proposal generation - classification problem. However,…

Computer Vision and Pattern Recognition · Computer Science 2022-03-04 Chen Zhao , Merey Ramazanova , Mengmeng Xu , Bernard Ghanem

Weakly supervised temporal action localization aims to localize temporal boundaries of actions and simultaneously identify their categories with only video-level category labels. Many existing methods seek to generate pseudo labels for…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Linjiang Huang , Liang Wang , Hongsheng Li

Point-supervised Temporal Action Localization (PTAL) adopts a lightly frame-annotated paradigm (\textit{i.e.}, labeling only a single frame per action instance) to train a model to effectively locate action instances within untrimmed…

Computer Vision and Pattern Recognition · Computer Science 2026-02-06 Yunchuan Ma , Laiyun Qing , Guorong Li , Yuqing Liu , Yuankai Qi , Qingming Huang

Weakly-supervised temporal action localization (WTAL) in untrimmed videos has emerged as a practical but challenging task since only video-level labels are available. Existing approaches typically leverage off-the-shelf segment-level…

Computer Vision and Pattern Recognition · Computer Science 2021-12-22 Zichen Yang , Jie Qin , Di Huang

State-of-the-art temporal action detectors inefficiently search the entire video for specific actions. Despite the encouraging progress these methods achieve, it is crucial to design automated approaches that only explore parts of the video…

Computer Vision and Pattern Recognition · Computer Science 2018-07-30 Humam Alwassel , Fabian Caba Heilbron , Bernard Ghanem

In this report, we introduce the Winner method for HACS Temporal Action Localization Challenge 2019. Temporal action localization is challenging since a target proposal may be related to several other candidate proposals in an untrimmed…

Computer Vision and Pattern Recognition · Computer Science 2019-12-10 Songyang Zhang , Houwen Peng , Le Yang , Jianlong Fu , Jiebo Luo

Weakly-supervised temporal action localization aims to locate action regions and identify action categories in untrimmed videos simultaneously by taking only video-level labels as the supervision. Pseudo label generation is a promising…

Computer Vision and Pattern Recognition · Computer Science 2023-12-27 Wulian Yun , Mengshi Qi , Chuanming Wang , Huadong Ma

Unsupervised video representation learning has made remarkable achievements in recent years. However, most existing methods are designed and optimized for video classification. These pre-trained models can be sub-optimal for temporal…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Can Zhang , Tianyu Yang , Junwu Weng , Meng Cao , Jue Wang , Yuexian Zou