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This paper deals with the problem of detecting fallen people lying on the floor by means of a mobile robot equipped with a 3D depth sensor. In the proposed algorithm, inspired by semantic segmentation techniques, the 3D scene is…

Robotics · Computer Science 2019-04-09 Morris Antonello , Marco Carraro , Marco Pierobon , Emanuele Menegatti

Smartphone apps for exposure notification and contact tracing have been shown to be effective in controlling the COVID-19 pandemic. However, Bluetooth Low Energy tokens similar to those broadcast by existing apps can still be picked up far…

Networking and Internet Architecture · Computer Science 2021-06-08 Zach Van Hyfte , Avideh Zakhor

Accurate food intake detection is vital for dietary monitoring and chronic disease prevention. Traditional self-report methods are prone to recall bias, while camera-based approaches raise concerns about privacy. Furthermore, existing…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Jiaxi Yin , Pengcheng Wang , Han Ding , Fei Wang

Smartphones have become quite pervasive in various aspects of our daily lives. They have become important links to a host of important data and applications, which if compromised, can lead to disastrous results. Due to this, today's…

Signal Processing · Electrical Eng. & Systems 2017-11-15 Thingom Bishal Singha , Rajsekhar Kumar Nath , A. V. Narsimhadhan

Wi-Fi sensing has emerged as a versatile tool for tasks such as localization, gesture recognition, and vital-sign monitoring, enabling applications from smart environments to personalized healthcare. However, sensing accuracy often…

Signal Processing · Electrical Eng. & Systems 2026-05-27 Fabian Portner , Francesco Gringoli , Matthias Hollick , Arash Asadi

The automatic detection of gait anomalies can lead to systems that can be used for fall detection and prevention. In this paper, we present a gait anomaly detection system based on the Matrix Profile (MP) algorithm. The MP algorithm is…

Signal Processing · Electrical Eng. & Systems 2023-07-19 Branislav Gerazov , Elena Hadzieva , Andrei Krivosei , Fiorella Ines Soto Sanchez , Jakob Rostovski , Alar Kuusik , Mahtab Alam

Mobile phones are becoming increasingly advanced and the latest ones are equipped with many diverse and powerful sensors. These sensors can be used to study different position and orientation of the phone which can help smartphone…

Computers and Society · Computer Science 2018-02-14 Karthik R , Preetam Satapath , Srivatsa Patnaik , Saurabh Priyadarshi , Rajesh Kumar M

Accurate detection of human presence in indoor environments is important for various applications, such as energy management and security. In this paper, we propose a novel system for human presence detection using the channel state…

Machine Learning · Computer Science 2024-02-09 Li-Hsiang Shen , An-Hung Hsiao , Kuan-I Lu , Kai-Ten Feng

The widespread use of smartphones gives rise to new security and privacy concerns. Smartphone thefts account for the largest percentage of thefts in recent crime statistics. Using a victim's smartphone, the attacker can launch impersonation…

Cryptography and Security · Computer Science 2017-03-10 Wei-Han Lee , Ruby Lee

Wi-Fi Channel State Information (CSI) enables device-free human activity recognition, but existing multi-user approaches assume a fixed set of known users during both training and inference. This closed-set assumption limits deployment, as…

Machine Learning · Computer Science 2026-04-21 Kemal Bayik , Olayinka Ajayi , Daniel Roggen , Philip Birch

Many applications involve humans in the loop, where continuous and accurate human motion monitoring provides valuable information for safe and intuitive human-machine interaction. Portable devices such as inertial measurement units (IMUs)…

Systems and Control · Electrical Eng. & Systems 2023-04-12 Xiaobing Dai , Huanzhuo Wu , Siyi Wang , Junjie Jiao , Giang T. Nguyen , Frank H. P. Fitzek , Sandra Hirche

Real-time lower limb movement resistance monitoring is critical for various applications in clinical and sports settings, such as rehabilitation and athletic training. Current methods often face limitations in accuracy, computational…

Signal Processing · Electrical Eng. & Systems 2024-10-29 Buren Batu , Yuanmeng Liu , Tianyi Lyu

Remote monitoring of motor functions is a powerful approach for health assessment, especially among the elderly population or among subjects affected by pathologies that negatively impact their walking capabilities. This is further…

Signal Processing · Electrical Eng. & Systems 2022-05-18 Antonio Bevilacqua , Lisa Alcock , Brian Caulfield , Eran Gazit , Clint Hansen , Neil Ireson , Georgiana Ifrim

Elderly gait is a source of rich information about their physical and mental health condition. As an alternative to the multiple sensors on the lower body parts, a single sensor on the pelvis has a positional advantage and an abundance of…

Signal Processing · Electrical Eng. & Systems 2022-03-02 Muhammad Zeeshan Arshad , Ankhzaya Jamsrandorj , Jinwook Kim , Kyung-Ryoul Mun

Accurate diagnosis of gait impairments is often hindered by subjective or costly assessment methods, with current solutions requiring either expensive multi-camera equipment or relying on subjective clinical observation. There is a critical…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Lauhitya Reddy , Ketan Anand , Shoibolina Kaushik , Corey Rodrigo , J. Lucas McKay , Trisha M. Kesar , Hyeokhyen Kwon

Wi-Fi-based human activity recognition (HAR) has emerged as a promising approach for contactless sensing, leveraging channel state information (CSI) collected from wireless transceivers. While existing studies have primarily concentrated on…

Signal Processing · Electrical Eng. & Systems 2026-05-21 Amirhossein Mohammadi , Hina Tabassum

Background/Objectives: Falls represent a major health concern for stroke survivors, necessitating effective risk assessment tools. This study proposes the Instrumented Fall Risk Assessment (IFRA) scale, a novel screening tool derived from…

Algorithms for state estimation of humanoid robots usually assume that the feet remain flat and in a constant position while in contact with the ground. However, this hypothesis is easily violated while walking, especially for human-like…

With the development of the Internet of Things(IoT) and Artificial Intelligence(AI) technologies, human activity recognition has enabled various applications, such as smart homes and assisted living. In this paper, we target a new…

Machine Learning · Computer Science 2021-06-30 Rex Liu , Sarina A Fazio , Huanle Zhang , Albara Ah Ramli , Xin Liu , Jason Yeates Adams

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