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Wearable sensor based human activity recognition is a challenging problem due to difficulty in modeling spatial and temporal dependencies of sensor signals. Recognition models in closed-set assumption are forced to yield members of known…

Computer Vision and Pattern Recognition · Computer Science 2024-04-24 M Tanjid Hasan Tonmoy , Saif Mahmud , A K M Mahbubur Rahman , M Ashraful Amin , Amin Ahsan Ali

Human action recognition is an important task in computer vision. Extracting discriminative spatial and temporal features to model the spatial and temporal evolutions of different actions plays a key role in accomplishing this task. In this…

Computer Vision and Pattern Recognition · Computer Science 2016-11-21 Sijie Song , Cuiling Lan , Junliang Xing , Wenjun Zeng , Jiaying Liu

The emergence of self-supervised learning in the field of wearables-based human activity recognition (HAR) has opened up opportunities to tackle the most pressing challenges in the field, namely to exploit unlabeled data to derive reliable…

Signal Processing · Electrical Eng. & Systems 2022-11-22 Harish Haresamudram , Irfan Essa , Thomas Plötz

The cognitive system for human action and behavior has evolved into a deep learning regime, and especially the advent of Graph Convolution Networks has transformed the field in recent years. However, previous works have mainly focused on…

Computer Vision and Pattern Recognition · Computer Science 2021-07-16 Feng Shi , Chonghan Lee , Liang Qiu , Yizhou Zhao , Tianyi Shen , Shivran Muralidhar , Tian Han , Song-Chun Zhu , Vijaykrishnan Narayanan

Skeleton-based action recognition, which classifies human actions based on the coordinates of joints and their connectivity within skeleton data, is widely utilized in various scenarios. While Graph Convolutional Networks (GCNs) have been…

Computer Vision and Pattern Recognition · Computer Science 2024-07-18 Jeonghyeok Do , Munchurl Kim

Deep Learning models hold state-of-the-art performance in many fields, but their vulnerability to adversarial examples poses threat to their ubiquitous deployment in practical settings. Additionally, adversarial inputs generated on one…

Machine Learning · Computer Science 2021-03-31 Deepak Ravikumar , Sangamesh Kodge , Isha Garg , Kaushik Roy

Processing sequential multi-sensor data becomes important in many tasks due to the dramatic increase in the availability of sensors that can acquire sequential data over time. Human Activity Recognition (HAR) is one of the fields which are…

Machine Learning · Computer Science 2020-11-24 Zeyd Boukhers , Danniene Wete , Steffen Staab

Rapid progress and superior performance have been achieved for skeleton-based action recognition recently. In this article, we investigate this problem under a cross-dataset setting, which is a new, pragmatic, and challenging task in…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Yansong Tang , Xingyu Liu , Xumin Yu , Danyang Zhang , Jiwen Lu , Jie Zhou

Human activity recognition (HAR) in ubiquitous computing is beginning to adopt deep learning to substitute for well-established analysis techniques that rely on hand-crafted feature extraction and classification techniques. From these…

Machine Learning · Computer Science 2016-05-02 Nils Y. Hammerla , Shane Halloran , Thomas Ploetz

The aim of this research is to recognize human actions performed on stage to aid visually impaired and blind individuals. To achieve this, we have created a theatre human action recognition system that uses skeleton data captured by depth…

Computer Vision and Pattern Recognition · Computer Science 2023-06-29 Leyla Benhamida , Slimane Larabi

Human Activity Recognition (HAR) is a field of study that focuses on identifying and classifying human activities. Skeleton-based Human Activity Recognition has received much attention in recent years, where Graph Convolutional Network…

Computer Vision and Pattern Recognition · Computer Science 2024-08-01 Jingyao Wang , Emmanuel Bergeret , Issam Falih

Human Activity Recognition (HAR) is one of the fundamental building blocks of human assistive devices like orthoses and exoskeletons. There are different approaches to HAR depending on the application. Numerous studies have been focused on…

Human-Computer Interaction · Computer Science 2024-03-08 Farhad Nazari , Darius Nahavandi , Navid Mohajer , Abbas Khosravi

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

Deep neural networks (DNNs) are susceptible to adversarial examples, which introduce imperceptible perturbations to benign samples, deceiving DNN predictions. While some attack methods excel in the white-box setting, they often struggle in…

Computer Vision and Pattern Recognition · Computer Science 2023-11-21 Jiayang Liu , Siyu Zhu , Siyuan Liang , Jie Zhang , Han Fang , Weiming Zhang , Ee-Chien Chang

Skeleton-based action recognition models have recently been shown to be vulnerable to adversarial attacks. Compared to adversarial attacks on images, perturbations to skeletons are typically bounded to a lower dimension of approximately 100…

Computer Vision and Pattern Recognition · Computer Science 2022-03-28 Nariki Tanaka , Hiroshi Kera , Kazuhiko Kawamoto

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

Human Activity Recognition from body-worn sensor data poses an inherent challenge in capturing spatial and temporal dependencies of time-series signals. In this regard, the existing recurrent or convolutional or their hybrid models for…

Numerous techniques have been proposed for generating adversarial examples in white-box settings under strict Lp-norm constraints. However, such norm-bounded examples often fail to align well with human perception, and only a few methods…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Abdullah Al Nomaan Nafi , Habibur Rahaman , Zafaryab Haider , Tanzim Mahfuz , Fnu Suya , Swarup Bhunia , Prabuddha Chakraborty

In smart healthcare, Human Activity Recognition (HAR) is considered to be an efficient model in pervasive computation from sensor readings. The Ambient Assisted Living (AAL) in the home or community helps the people in providing independent…

Machine Learning · Computer Science 2021-11-22 Pankaj Khatiwada , Ayan Chatterjee , Matrika Subedi

Despite the widespread integration of ambient light sensors (ALS) in smart devices commonly used for screen brightness adaptation, their application in human activity recognition (HAR), primarily through body-worn ALS, is largely…

Artificial Intelligence · Computer Science 2024-08-23 Lala Shakti Swarup Ray , Daniel Geißler , Mengxi Liu , Bo Zhou , Sungho Suh , Paul Lukowicz