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Human activity recognition (HAR) is a rapidly growing field that utilizes smart devices, sensors, and algorithms to automatically classify and identify the actions of individuals within a given environment. These systems have a wide range…

Human Activity Recognition (HAR) primarily relied on traditional RGB cameras to achieve high-performance activity recognition. However, the challenging factors in real-world scenarios, such as insufficient lighting and rapid movements,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Shiao Wang , Xiao Wang , Bo Jiang , Lin Zhu , Guoqi Li , Yaowei Wang , Yonghong Tian , Jin Tang

Human Activity Recognition (HAR) is a key building block of many emerging applications such as intelligent mobility, sports analytics, ambient-assisted living and human-robot interaction. With robust HAR, systems will become more…

Computer Vision and Pattern Recognition · Computer Science 2019-01-10 Mirco Moencks , Varuna De Silva , Jamie Roche , Ahmet Kondoz

Recent advancements in deep learning-based wearable human action recognition (wHAR) have improved the capture and classification of complex motions, but adoption remains limited due to the lack of expert annotations and domain discrepancies…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Indrajeet Ghosh , Garvit Chugh , Abu Zaher Md Faridee , Nirmalya Roy

Wearable HAR has improved steadily, but most progress still relies on closed-set classification, which limits real-world use. In practice, human activity is open-ended, unscripted, personalized, and often compositional, unfolding as…

Machine Learning · Computer Science 2026-04-02 Lala Shakti Swarup Ray , Mengxi Liu , Alcina Pinto , Deepika Gurung , Daniel Geissler , Paul Lukowoicz , Bo Zhou

In the last few years there has been a growing interest in Human Activity Recognition~(HAR) topic. Sensor-based HAR approaches, in particular, has been gaining more popularity owing to their privacy preserving nature. Furthermore, due to…

Machine Learning · Computer Science 2019-03-13 Parviz Asghari , Elnaz Soelimani , Ehsan Nazerfard

In this paper, we propose a self-supervised learning solution for human activity recognition with smartphone accelerometer data. We aim to develop a model that learns strong representations from accelerometer signals, in order to perform…

Signal Processing · Electrical Eng. & Systems 2024-10-28 Setareh Rahimi Taghanaki , Michael Rainbow , Ali Etemad

Human activity recognition (HAR) is a machine learning task with important applications in healthcare especially in the context of home care of patients and older adults. HAR is often based on data collected from smart sensors, particularly…

Computer Vision and Pattern Recognition · Computer Science 2022-11-07 Ali Raza , Kim Phuc Tran , Ludovic Koehl , Shujun Li , Xianyi Zeng , Khaled Benzaidi

Advances in deep learning for human activity recognition have been relatively limited due to the lack of large labelled datasets. In this study, we leverage self-supervised learning techniques on the UK-Biobank activity tracker dataset--the…

Signal Processing · Electrical Eng. & Systems 2024-06-21 Hang Yuan , Shing Chan , Andrew P. Creagh , Catherine Tong , Aidan Acquah , David A. Clifton , Aiden Doherty

Human activity recognition (HAR) research often lacks accessible, comprehensive field data. Commercial systems are rarely open source, hard to expand, and limited by issues like node synchronisation, data throughput, unclear sensor…

Networking and Internet Architecture · Computer Science 2025-07-28 Philipp Lepold , Tobias Röddiger , Michael Beigl

Human Activity Recognition (HAR) is one of the central problems in fields such as healthcare, elderly care, and security at home. However, traditional HAR approaches face challenges including data scarcity, difficulties in model…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Xi Chen , Julien Cumin , Fano Ramparany , Dominique Vaufreydaz

Background: Smartphones are now nearly ubiquitous; their numerous built-in sensors enable continuous measurement of activities of daily living, making them especially well-suited for health research. Researchers have proposed various human…

Human-Computer Interaction · Computer Science 2021-03-29 Marcin Straczkiewicz , Peter James , Jukka-Pekka Onnela

In this study, a novel method to obtain user-dependent human activity recognition models unobtrusively by exploiting the sensors of a smartphone is presented. The recognition consists of two models: sensor fusion-based user-independent…

Machine Learning · Computer Science 2019-05-30 Pekka Siirtola , Heli Koskimäki , Juha Röning

One of the primary challenges in the field of human activity recognition (HAR) is the lack of large labeled datasets. This hinders the development of robust and generalizable models. Recently, cross modality transfer approaches have been…

Computer Vision and Pattern Recognition · Computer Science 2024-02-05 Zikang Leng , Amitrajit Bhattacharjee , Hrudhai Rajasekhar , Lizhe Zhang , Elizabeth Bruda , Hyeokhyen Kwon , Thomas Plötz

Pedestrian Attribute Recognition (PAR) is a challenging task as models are required to generalize across numerous attributes in real-world data. Traditional approaches focus on complex methods, yet recognition performance is often…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Alejandro Alonso , Sawaiz A. Chaudhry , Juan C. SanMiguel , Álvaro García-Martín , Pablo Ayuso-Albizu , Pablo Carballeira

The research of machine learning (ML) algorithms for human activity recognition (HAR) has made significant progress with publicly available datasets. However, most research prioritizes statistical metrics over examining negative sample…

Machine Learning · Computer Science 2024-12-13 Daniel Geissler , Dominique Nshimyimana , Vitor Fortes Rey , Sungho Suh , Bo Zhou , Paul Lukowicz

Wi-Fi-based human activity recognition (HAR) provides substantial convenience and has emerged as a thriving research field, yet the coarse spatial resolution inherent to Wi-Fi significantly hinders its ability to distinguish multiple…

Signal Processing · Electrical Eng. & Systems 2025-10-22 Xin Li , Jingzhi Hu , Yinghui He , Hongbo Wang , Jin Gan , Jun Luo

Recognizing human activities from multi-channel time series data collected from wearable sensors is ever more practical. However, in real-world conditions, coherent activities and body movements could happen at the same time, like moving…

Signal Processing · Electrical Eng. & Systems 2020-04-21 Liming Zhang

Human Activity Recognition (HAR) has become one of the leading research topics of the last decade. As sensing technologies have matured and their economic costs have declined, a host of novel applications, e.g., in healthcare, industry,…

Machine Learning · Computer Science 2023-07-13 Florenc Demrozi , Cristian Turetta , Fadi Al Machot , Graziano Pravadelli , Philipp H. Kindt

The problem of human activity recognition is central for understanding and predicting the human behavior, in particular in a prospective of assistive services to humans, such as health monitoring, well being, security, etc. There is…

Machine Learning · Statistics 2013-12-30 Faicel Chamroukhi , Samer Mohammed , Dorra Trabelsi , Latifa Oukhellou , Yacine Amirat