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Computer Vision-Based Human Activity Recognition

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Sensing and Imaging".

Deadline for manuscript submissions: 15 December 2024 | Viewed by 1423

Special Issue Editor


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Guest Editor

Special Issue Information

Dear Colleagues,

Humans perform a common set of (physical) activities of daily living (ADLs) necessary for self-care and living independently, involving body-part versus whole-body movement. Yet, humans also perform a richer variety of ADLs applied to entertainment, health, sports, surveillance, transport, leisure, and work, involving single and groups of humans scaling up to large crowds. Increasing (and autonomous) automation, changes to the physical environment, and the ageing yet increasing population will affect our ADLs. Hence, recognising, modelling, and analysing ADLs are essential and have many benefits and applications. Whilst a range of sensors can be used for human activity recognition (HAR), the focus here is on the use of computer vision (CV) used for HAR that includes a range of cameras—micro to macro, short-range to remote, stationary versus mobile, and visible versus non-visible light—and can involve the use of hybrid (non-visual plus) visual sensor fusion. This is being driven by advances in micro-sensors, cheaper high-resolution cameras, the increased embedding of cameras into the environment, and improvements in computer vision object recognition and artificial intelligence. Note that most HAR goes beyond pure human recognition and involves relevant physical object recognition to greatly aid this too. This SI targets innovations that support the narrative given above. It also includes new methods and designs for systems based on the Internet of Things; cyber-physical and embedded systems; sensor data acquisition; sensor data fusion; data analytics involving probabilistic and digital twin models to classify, predict, and simulate HAR; data science and AI; and data visualisation and decision support for HAR. Note that accepted papers need to have a viable computer vision-sensing element for HAR. 

Dr. Stefan Poslad
Guest Editor

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Keywords

  • human activity recognition (HAR)
  • activities of daily living (ADLs)
  • computer vision (CV)
  • sensor data fusion for CV
  • AI and data science for CV

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Published Papers (1 paper)

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Research

21 pages, 10905 KiB  
Article
Low-Cost Non-Wearable Fall Detection System Implemented on a Single Board Computer for People in Need of Care
by Vanessa Vargas, Pablo Ramos, Edwin A. Orbe, Mireya Zapata and Kevin Valencia-Aragón
Sensors 2024, 24(17), 5592; https://doi.org/10.3390/s24175592 - 29 Aug 2024
Viewed by 1040
Abstract
This work aims at proposing an affordable, non-wearable system to detect falls of people in need of care. The proposal uses artificial vision based on deep learning techniques implemented on a Raspberry Pi4 4GB RAM with a High-Definition IR-CUT camera. The CNN architecture [...] Read more.
This work aims at proposing an affordable, non-wearable system to detect falls of people in need of care. The proposal uses artificial vision based on deep learning techniques implemented on a Raspberry Pi4 4GB RAM with a High-Definition IR-CUT camera. The CNN architecture classifies detected people into five classes: fallen, crouching, sitting, standing, and lying down. When a fall is detected, the system sends an alert notification to mobile devices through the Telegram instant messaging platform. The system was evaluated considering real daily indoor activities under different conditions: outfit, lightning, and distance from camera. Results show a good trade-off between performance and cost of the system. Obtained performance metrics are: precision of 96.4%, specificity of 96.6%, accuracy of 94.8%, and sensitivity of 93.1%. Regarding privacy concerns, even though this system uses a camera, the video is not recorded or monitored by anyone, and pictures are only sent in case of fall detection. This work can contribute to reducing the fatal consequences of falls in people in need of care by providing them with prompt attention. Such a low-cost solution would be desirable, particularly in developing countries with limited or no medical alert systems and few resources. Full article
(This article belongs to the Special Issue Computer Vision-Based Human Activity Recognition)
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