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In many real-world complex systems, the behavior can be observed as a collection of discrete events generated by multiple interacting agents. Analyzing the dynamics of these multi-agent systems, especially team sports, often relies on…

Artificial Intelligence · Computer Science 2025-05-23 Rikuhei Umemoto , Keisuke Fujii

Accurate analysis of combat sports using computer vision has gained traction in recent years, yet the development of robust datasets remains a major bottleneck due to the dynamic, unstructured nature of actions and variations in recording…

Computer Vision and Pattern Recognition · Computer Science 2025-11-21 Rahul Kumar , Vipul Baghel , Sudhanshu Singh , Bikash Kumar Badatya , Shivam Yadav , Babji Srinivasan , Ravi Hegde

In human activity recognition (HAR), activity labels have typically been encoded in one-hot format, which has a recent shift towards using textual representations to provide contextual knowledge. Here, we argue that HAR should be anchored…

Computer Vision and Pattern Recognition · Computer Science 2025-03-20 Shuheng Li , Jiayun Zhang , Xiaohan Fu , Xiyuan Zhang , Jingbo Shang , Rajesh K. Gupta

Physical activity recognition (PAR) using wearable devices can provide valued information regarding an individual's degree of functional ability and lifestyle. In this regards, smartphone-based physical activity recognition is a…

Computers and Society · Computer Science 2019-04-23 Muhammad Ahmad , Adil Mehmood Khan , Manuel Mazzara , Salvatore Distefano

Sports action classification representing complex body postures and player-object interactions is an emerging area in image-based sports analysis. Some works have contributed to automated sports action recognition using machine learning…

Computer Vision and Pattern Recognition · Computer Science 2025-07-16 Palash Ray , Mahuya Sasmal , Asish Bera

Soccer analytics is attracting increasing interest in academia and industry, thanks to the availability of data that describe all the spatio-temporal events that occur in each match. These events (e.g., passes, shots, fouls) are collected…

Computer Vision and Pattern Recognition · Computer Science 2020-07-14 Danilo Sorano , Fabio Carrara , Paolo Cintia , Fabrizio Falchi , Luca Pappalardo

Previous research has demonstrated the advantages of integrating data from multiple sources over traditional unimodal data, leading to the emergence of numerous novel multimodal applications. We propose a multimodal classification benchmark…

Machine Learning · Computer Science 2023-12-20 Jiaying Lu , Yongchen Qian , Shifan Zhao , Yuanzhe Xi , Carl Yang

Humans utilize their gaze to concentrate on essential information while perceiving and interpreting intentions in videos. Incorporating human gaze into computational algorithms can significantly enhance model performance in video…

Computer Vision and Pattern Recognition · Computer Science 2024-04-15 Suleyman Ozdel , Yao Rong , Berat Mert Albaba , Yen-Ling Kuo , Xi Wang , Enkelejda Kasneci

Human activity recognition (HAR) through wearable devices has received much interest due to its numerous applications in fitness tracking, wellness screening, and supported living. As a result, we have seen a great deal of work in this…

Machine Learning · Computer Science 2022-06-13 Nafees Ahmad , Savio Ho-Chit Chow , Ho-fung Leung

Musculoskeletal injuries during military training significantly impact readiness, making prevention through activity monitoring crucial. While Human Activity Recognition (HAR) using wearable devices offers promising solutions, it faces…

Machine Learning · Computer Science 2025-04-30 Barak Gahtan , Shany Funk , Einat Kodesh , Itay Ketko , Tsvi Kuflik , Alex M. Bronstein

Recently, deep multi-agent reinforcement learning (MARL) has shown the promise to solve complex cooperative tasks. Its success is partly because of parameter sharing among agents. However, such sharing may lead agents to behave similarly…

Machine Learning · Computer Science 2021-11-02 Chenghao Li , Tonghan Wang , Chengjie Wu , Qianchuan Zhao , Jun Yang , Chongjie Zhang

Multi-Object Tracking (MOT) plays a critical role in analyzing player behavior from videos, enabling performance evaluation. Current MOT methods are often evaluated using publicly available datasets. However, most of these focus on everyday…

Computer Vision and Pattern Recognition · Computer Science 2025-11-13 Rintaro Otsubo , Kanta Sawafuji , Hideo Saito

This paper presents a unified framework to (i) locate the ball, (ii) predict the pose, and (iii) segment the instance mask of players in team sports scenes. Those problems are of high interest in automated sports analytics, production, and…

Computer Vision and Pattern Recognition · Computer Science 2021-12-02 Seyed Abolfazl Ghasemzadeh , Gabriel Van Zandycke , Maxime Istasse , Niels Sayez , Amirafshar Moshtaghpour , Christophe De Vleeschouwer

Our world is full of varied actions and moves across specialized domains that we, as humans, strive to identify and understand. Within any single domain, actions can often appear quite similar, making it challenging for deep models to…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Mohammadreza Salehi , Jae Sung Park , Tanush Yadav , Aditya Kusupati , Ranjay Krishna , Yejin Choi , Hannaneh Hajishirzi , Ali Farhadi

Semi-supervised learning is a popular class of techniques to learn from labeled and unlabeled data. The paper proposes an application of a recently proposed approach of graph transduction that exploits game theoretic notions to the problem…

Computer Vision and Pattern Recognition · Computer Science 2018-06-26 Tewodros Mulugeta Dagnew , Dalia Coppi , Marcello Pelillo , Rita Cucchiara

Panoramic Activity Recognition (PAR) seeks to identify diverse human activities across different scales, from individual actions to social group and global activities in crowded panoramic scenes. PAR presents two major challenges: 1)…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Sumin Lee , Yooseung Wang , Sangmin Woo , Changick Kim

We modeled the dynamics of a soccer match based on a network representation where players are nodes discretely clustered into homogeneous groups. Players were grouped by physical proximity, supported by the intuitive notion that competing…

Social and Information Networks · Computer Science 2021-08-09 Luis Ramada Pereira , Rui J. Lopes , Jorge Louçã , Duarte Araújo , João Ramos

Multiple existing benchmarks involve tracking and segmenting objects in video e.g., Video Object Segmentation (VOS) and Multi-Object Tracking and Segmentation (MOTS), but there is little interaction between them due to the use of disparate…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Ali Athar , Jonathon Luiten , Paul Voigtlaender , Tarasha Khurana , Achal Dave , Bastian Leibe , Deva Ramanan

In visual surveillance systems, it is necessary to recognize the behavior of people handling objects such as a phone, a cup, or a plastic bag. In this paper, to address this problem, we propose a new framework for recognizing object-related…

Computer Vision and Pattern Recognition · Computer Science 2023-12-29 Sunoh Kim , Kimin Yun , Jongyoul Park , Jin Young Choi

Purpose: Gaze-following, the task of inferring where individuals are looking, has been widely studied in computer vision, advancing research in visual attention modeling, social scene understanding, and human-robot interaction. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-23 Keqi Chen , Séraphin Baributsa , Lilien Schewski , Vinkle Srivastav , Didier Mutter , Guido Beldi , Sandra Keller , Nicolas Padoy