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The popularity and diffusion of wearable devices provides new opportunities for sensor-based human activity recognition that leverages deep learning-based algorithms. Although impressive advances have been made, two major challenges remain.…

Signal Processing · Electrical Eng. & Systems 2024-02-16 Mengna Liu , Dong Xiang , Xu Cheng , Xiufeng Liu , Dalin Zhang , Shengyong Chen , Christian S. Jensen

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

Multimodal human action recognition (HAR) leverages complementary sensors for activity classification. Beyond recognition, recent advances in large language models (LLMs) enable detailed descriptions and causal reasoning, motivating new…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Siyang Jiang , Mu Yuan , Xiang Ji , Bufang Yang , Zeyu Liu , Lilin Xu , Yang Li , Yuting He , Liran Dong , Wenrui Lu , Zhenyu Yan , Xiaofan Jiang , Wei Gao , Hongkai Chen , Guoliang Xing

Human activity recognition (HAR) ideally relies on data from wearable or environment-instrumented sensors sampled at regular intervals, enabling standard neural network models optimized for consistent time-series data as input. However,…

Signal Processing · Electrical Eng. & Systems 2025-01-28 Mengxi Liu , Daniel Geißler , Sizhen Bian , Bo Zhou , Paul Lukowicz

Human Activity Recognition (HAR) is one of the key applications of health monitoring that requires continuous use of wearable devices to track daily activities. This paper proposes an Adaptive CNN for energy-efficient HAR (AHAR) suitable…

Machine Learning · Computer Science 2022-01-04 Nafiul Rashid , Berken Utku Demirel , Mohammad Abdullah Al Faruque

While computers play an increasingly important role in every aspect of our lives, their inability to understand what tasks users are physically performing makes a wide range of applications, including health monitoring and context-specific…

Human-Computer Interaction · Computer Science 2021-08-17 Arvind Seshan

Human Activity Recognition (HAR) has recently witnessed advancements with Transformer-based models. Especially, ActionFormer shows us a new perspectives for HAR in the sense that this approach gives us additional outputs which detect the…

Machine Learning · Computer Science 2025-05-28 Kunpeng Zhao , Asahi Miyazaki , Tsuyoshi Okita

Supervised Deep Learning (DL) models are currently the leading approach for sensor-based Human Activity Recognition (HAR) on wearable and mobile devices. However, training them requires large amounts of labeled data whose collection is…

Machine Learning · Computer Science 2023-04-20 Luca Arrotta , Gabriele Civitarese , Samuele Valente , Claudio Bettini

Recognizing human actions in video sequences, known as Human Action Recognition (HAR), is a challenging task in pattern recognition. While Convolutional Neural Networks (ConvNets) have shown remarkable success in image recognition, they are…

Computer Vision and Pattern Recognition · Computer Science 2023-09-22 Nguyen Huu Phong , Bernardete Ribeiro

Humans naturally follow distinct patterns when conducting their daily activities, which are driven by established practices and processes, such as production workflows, social norms and daily routines. Human activity recognition (HAR)…

Artificial Intelligence · Computer Science 2024-11-14 Jiawei Zheng , Petros Papapanagiotou , Jacques D. Fleuriot , Jane Hillston

Human Activity Recognition (HAR) from devices like smartphone accelerometers is a fundamental problem in ubiquitous computing. Machine learning based recognition models often perform poorly when applied to new users that were not part of…

Machine Learning · Computer Science 2020-12-22 Alan Mazankiewicz , Klemens Böhm , Mario Bergés

Many activity classifications segments data into fixed window size for feature extraction and classification. However, animal behaviors have various durations that do not match the predetermined window size. The dense labeling and dense…

Signal Processing · Electrical Eng. & Systems 2022-09-09 Zhuqing Zhao , Dong Ha , Abhishek Damle , Barbara Roqueto Dos , Robin White , Sook Ha

The vast proliferation of sensor devices and Internet of Things enables the applications of sensor-based activity recognition. However, there exist substantial challenges that could influence the performance of the recognition system in…

Human-Computer Interaction · Computer Science 2021-01-25 Kaixuan Chen , Dalin Zhang , Lina Yao , Bin Guo , Zhiwen Yu , Yunhao Liu

Ambient computing is gaining popularity as a major technological advancement for the future. The modern era has witnessed a surge in the advancement in healthcare systems, with viable radio frequency solutions proposed for remote and…

Machine Learning · Computer Science 2023-04-20 Muhammad Zakir Khan , Jawad Ahmad , Wadii Boulila , Matthew Broadbent , Syed Aziz Shah , Anis Koubaa , Qammer H. Abbasi

Due to the increasing number of mobile robots including domestic robots for cleaning and maintenance in developed countries, human activity recognition is inevitable for congruent human-robot interaction. Needless to say that this is indeed…

Human-Computer Interaction · Computer Science 2018-09-26 Iyiola E. Olatunji

With each sensing modality exhibiting inherent strengths and limitations, multi-modal approaches for wearable Human Activity Recognition (HAR) are becoming increasingly relevant -- particularly for recognizing Activities of Daily Living…

Machine Learning · Computer Science 2026-05-05 Robin Burchard , Pascal-André Brückner , Marius Bock , Juergen Gall , Kristof Van Laerhoven

The combination of increased life expectancy and falling birth rates is resulting in an aging population. Wearable Sensor-based Human Activity Recognition (WSHAR) emerges as a promising assistive technology to support the daily lives of…

Signal Processing · Electrical Eng. & Systems 2024-04-25 Jianyuan Ni , Hao Tang , Syed Tousiful Haque , Yan Yan , Anne H. H. Ngu

Human activity recognition (HAR) in Internet of Things (IoT) environments must cope with heterogeneous sensor settings that vary across datasets, devices, body locations, sensing modalities, and channel compositions. This heterogeneity…

Machine Learning · Computer Science 2026-04-24 Tatsuhito Hasegawa

This paper presents a novel approach to solve simultaneously the problems of human activity recognition and whole-body motion and dynamics prediction for real-time applications. Starting from the dynamics of human motion and motor system…

Robotics · Computer Science 2023-03-15 Kourosh Darvish , Serena Ivaldi , Daniele Pucci

Human Activity Recognition (HAR), based on machine and deep learning algorithms is considered one of the most promising technologies to monitor professional and daily life activities for different categories of people (e.g., athletes,…

Signal Processing · Electrical Eng. & Systems 2024-11-19 Florenc Demrozi , Cristian Turetta , Graziano Pravadelli