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Motion sensors integrated into wearable and mobile devices provide valuable information about the device users. Machine learning and, recently, deep learning techniques have been used to characterize sensor data. Mostly, a single task, such…

Machine Learning · Computer Science 2023-11-15 Egemen İşgüder , Özlem Durmaz İncel

Human activity recognition~(HAR) has attracted significant research interest due to its applications in health monitoring and patient rehabilitation. Recent research on HAR focuses on using smartphones due to their widespread use. However,…

Computer Vision and Pattern Recognition · Computer Science 2019-02-06 Ganapati Bhat , Ranadeep Deb , Vatika Vardhan Chaurasia , Holly Shill , Umit Y. Ogras

In high-stake environments like emergency response or elder care, the integration of large language model (LLM), revolutionize risk assessment, resource allocation, and emergency responses in Human Activity Recognition (HAR) systems by…

Human-Computer Interaction · Computer Science 2024-10-07 Syed Mhamudul Hasan

Ambient sensor-based human activity recognition (HAR) in smart homes remains challenging due to the need for real-time inference, spatially grounded reasoning, and context-aware temporal modeling. Existing approaches often rely on…

Machine Learning · Computer Science 2025-11-11 Zishuai Liu , Weihang You , Jin Lu , Fei Dou

Conventional human activity recognition (HAR) relies on classifiers trained to predict discrete activity classes, inherently limiting recognition to activities explicitly present in the training set. Such classifiers would invariably fail,…

Artificial Intelligence · Computer Science 2025-01-14 Lala Shakti Swarup Ray , Bo Zhou , Sungho Suh , Paul Lukowicz

Human Action Recognition (HAR), one of the most important tasks in computer vision, has developed rapidly in the past decade and has a wide range of applications in health monitoring, intelligent surveillance, virtual reality, human…

Computer Vision and Pattern Recognition · Computer Science 2023-01-18 Zhou Shuchang

With the global population ageing, it is crucial to enable individuals to live independently and safely in their homes. Using ubiquitous sensors such as Passive InfraRed sensors (PIR) and door sensors is drawing increasing interest for…

Machine Learning · Computer Science 2026-01-21 Marina Vicini , Martin Rudorfer , Zhuangzhuang Dai , Luis J. Manso

Representing a label distribution as a one-hot vector is a common practice in training node classification models. However, the one-hot representation may not adequately reflect the semantic characteristics of a node in different classes,…

Machine Learning · Computer Science 2021-12-02 Yiwei Wang , Yujun Cai , Yuxuan Liang , Wei Wang , Henghui Ding , Muhao Chen , Jing Tang , Bryan Hooi

Human Activity Recognition (HAR) with wearable sensors is essential for applications in healthcare, fitness, and human-computer interaction. Bio-impedance sensing offers unique advantages for fine-grained motion capture but remains…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Lala Shakti Swarup Ray , Mengxi Liu , Deepika Gurung , Bo Zhou , Sungho Suh , Paul Lukowicz

Our ability to exploit low-cost wearable sensing modalities for critical human behaviour and activity monitoring applications in health and wellness is reliant on supervised learning regimes; here, deep learning paradigms have proven…

Signal Processing · Electrical Eng. & Systems 2020-08-20 Alireza Abedin , Farbod Motlagh , Qinfeng Shi , Seyed Hamid Rezatofighi , Damith Chinthana Ranasinghe

Sensor-based human activity recognition (HAR) is a paramount technology in the Internet of Things services. HAR using representation learning, which automatically learns a feature representation from raw data, is the mainstream method…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Tatsuhito Hasegawa , Kazuma Kondo

Label hierarchy is an important source of external knowledge that can enhance classification performance. However, most existing methods rely on predefined label hierarchies that may not match the data distribution. To address this issue,…

Machine Learning · Computer Science 2023-04-27 Zhiquan Tan , Zihao Wang , Yifan Zhang

Datasets composed of numerical and categorical attributes (also called mixed data hereinafter) are common in real clustering tasks. Differing from numerical attributes that indicate tendencies between two concepts (e.g., high and low…

Machine Learning · Computer Science 2026-03-06 Yiqun Zhang , Mingjie Zhao , Yizhou Chen , Yang Lu , Yiu-ming Cheung

In multi-class classification tasks, like human activity recognition, it is often assumed that classes are separable. In real applications, this assumption becomes strong and generates inconsistencies. Besides, the most commonly used…

Machine Learning · Computer Science 2021-04-13 Aomar Osmani , Massinissa Hamidi , Pegah Alizadeh

Low-resolution infrared-based human activity recognition (HAR) attracted enormous interests due to its low-cost and private. In this paper, a novel semi-supervised crossdomain neural network (SCDNN) based on 8 $\times$ 8 low-resolution…

Signal Processing · Electrical Eng. & Systems 2024-03-06 Cunyi Yin , Xiren Miao , Jing Chen , Hao Jiang , Deying Chen , Yixuan Tong , Shaocong Zheng

Learning and understanding the typical patterns in the daily activities and routines of people from low-level sensory data is an important problem in many application domains such as building smart environments, or providing intelligent…

Machine Learning · Computer Science 2014-08-14 Truyen Tran , Hung Bui , Svetha Venkatesh

Batteryless or so called passive wearables are providing new and innovative methods for human activity recognition (HAR), especially in healthcare applications for older people. Passive sensors are low cost, lightweight, unobtrusive and…

Machine Learning · Computer Science 2019-06-07 Alireza Abedin , S. Hamid Rezatofighi , Qinfeng Shi , Damith C. Ranasinghe

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

To fluently collaborate with people, robots need the ability to recognize human activities accurately. Although modern robots are equipped with various sensors, robust human activity recognition (HAR) still remains a challenging task for…

Robotics · Computer Science 2020-08-17 Md Mofijul Islam , Tariq Iqbal

Wearable computing and context awareness are the focuses of study in the field of artificial intelligence recently. One of the most appealing as well as challenging applications is the Human Activity Recognition (HAR) utilizing smart…

Machine Learning · Computer Science 2018-10-26 Mingtao Dong , Jindong Han