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We make available to the community a new dataset to support action-recognition research. This dataset is different from prior datasets in several key ways. It is significantly larger. It contains streaming video with long segments…

Computer Vision and Pattern Recognition · Computer Science 2015-11-19 Daniel Paul Barrett , Ran Xu , Haonan Yu , Jeffrey Mark Siskind

Video action recognition has made significant strides, but challenges remain in effectively using both spatial and temporal information. While existing methods often focus on either spatial features (e.g., object appearance) or temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Huilin Chen , Lei Wang , Yifan Chen , Tom Gedeon , Piotr Koniusz

The temporal segmentation of events is an essential task and a precursor for the automatic recognition of human actions in the video. Several attempts have been made to capture frame-level salient aspects through attention but they lack the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-08 Harshala Gammulle , Simon Denman , Sridha Sridharan , Clinton Fookes

Multi-view action clustering leverages the complementary information from different camera views to enhance the clustering performance. Although existing approaches have achieved significant progress, they assume all camera views are…

Computer Vision and Pattern Recognition · Computer Science 2024-04-12 Xiaoqiang Yan , Yingtao Gan , Yiqiao Mao , Yangdong Ye , Hui Yu

This paper proposes a novel deep learning-based video object matting method that can achieve temporally coherent matting results. Its key component is an attention-based temporal aggregation module that maximizes image matting networks'…

Computer Vision and Pattern Recognition · Computer Science 2021-07-30 Yunke Zhang , Chi Wang , Miaomiao Cui , Peiran Ren , Xuansong Xie , Xian-sheng Hua , Hujun Bao , Qixing Huang , Weiwei Xu

In the world of action recognition research, one primary focus has been on how to construct and train networks to model the spatial-temporal volume of an input video. These methods typically uniformly sample a segment of an input clip…

Computer Vision and Pattern Recognition · Computer Science 2020-12-16 Xinyu Li , Chunhui Liu , Bing Shuai , Yi Zhu , Hao Chen , Joseph Tighe

This paper studies the joint learning of action recognition and temporal localization in long, untrimmed videos. We employ a multi-task learning framework that performs the three highly related steps of action proposal, action recognition,…

Computer Vision and Pattern Recognition · Computer Science 2017-04-05 Yi Zhu , Shawn Newsam

This work presents an approach to category-based action recognition in video using sparse coding techniques. The proposed approach includes two main contributions: i) A new method to handle intra-class variations by decomposing each video…

Computer Vision and Pattern Recognition · Computer Science 2016-05-12 Anali Alfaro , Domingo Mery , Alvaro Soto

Viewpoint change invariance and action temporal consistency are critical aspects for the effective deployment of human action detection of untrimmed videos. Existing appearance-based video detection methods often struggle with limited…

Computer Vision and Pattern Recognition · Computer Science 2026-05-22 Yannick Porto , Renato Martins , Thomas Chalumeau , Cedric Demonceaux

Class-incremental learning is one of the most important settings for the study of Continual Learning, as it closely resembles real-world application scenarios. With constrained memory sizes, catastrophic forgetting arises as the number of…

Computer Vision and Pattern Recognition · Computer Science 2023-06-29 Lama Alssum , Juan Leon Alcazar , Merey Ramazanova , Chen Zhao , Bernard Ghanem

Temporal action segmentation (TAS) aims to classify and locate actions in the long untrimmed action sequence. With the success of deep learning, many deep models for action segmentation have emerged. However, few-shot TAS is still a…

Computer Vision and Pattern Recognition · Computer Science 2022-07-21 Leiyang Xu , Qiang Wang , Xiaotian Lin , Lin Yuan

We examine the problem of learning sequential tasks from a single visual demonstration. A key challenge arises when demonstrations are temporally misaligned due to variations in timing, differences in embodiment, or inconsistencies in…

Machine Learning · Computer Science 2025-07-16 William Huey , Huaxiaoyue Wang , Anne Wu , Yoav Artzi , Sanjiban Choudhury

Continual Learning is a burgeoning domain in next-generation AI, focusing on training neural networks over a sequence of tasks akin to human learning. While CL provides an edge over traditional supervised learning, its central challenge…

Machine Learning · Computer Science 2023-10-09 Guangji Bai , Qilong Zhao , Xiaoyang Jiang , Yifei Zhang , Liang Zhao

Temporal consistency is critical in video prediction to ensure that outputs are coherent and free of artifacts. Traditional methods, such as temporal attention and 3D convolution, may struggle with significant object motion and may not…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Zihang Lai , Andrea Vedaldi

We introduce a self-supervised representation learning method based on the task of temporal alignment between videos. The method trains a network using temporal cycle consistency (TCC), a differentiable cycle-consistency loss that can be…

Computer Vision and Pattern Recognition · Computer Science 2019-04-17 Debidatta Dwibedi , Yusuf Aytar , Jonathan Tompson , Pierre Sermanet , Andrew Zisserman

Understanding the structure of complex activities in untrimmed videos is a challenging task in the area of action recognition. One problem here is that this task usually requires a large amount of hand-annotated minute- or even hour-long…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Rosaura G. VidalMata , Walter J. Scheirer , Anna Kukleva , David Cox , Hilde Kuehne

Continual learning is a fundamental challenge in artificial intelligence that requires networks to acquire new knowledge while preserving previously learned representations. Despite the success of various approaches, most existing paradigms…

Machine Learning · Computer Science 2026-02-24 Patryk Krukowski , Jan Miksa , Piotr Helm , Jacek Tabor , Paweł Wawrzyński , Przemysław Spurek

Sequence prediction on temporal data requires the ability to understand compositional structures of multi-level semantics beyond individual and contextual properties. The task of temporal action segmentation, which aims at translating an…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Dayoung Gong , Joonseok Lee , Deunsol Jung , Suha Kwak , Minsu Cho

Temporal alignment of fine-grained human actions in videos is important for numerous applications in computer vision, robotics, and mixed reality. State-of-the-art methods directly learn image-based embedding space by leveraging powerful…

Computer Vision and Pattern Recognition · Computer Science 2022-04-27 Taein Kwon , Bugra Tekin , Siyu Tang , Marc Pollefeys

Generalist segmentation models are increasingly favored for diverse tasks involving various objects from different image sources. Task-Incremental Learning (TIL) offers a privacy-preserving training paradigm using tasks arriving…

Image and Video Processing · Electrical Eng. & Systems 2024-07-01 Wei Li , Jingyang Zhang , Pheng-Ann Heng , Lixu Gu