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Vision- and Sensor-Based Sensing in Human Activity Recognition—Second Edition

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

Deadline for manuscript submissions: 10 May 2026 | Viewed by 1489

Special Issue Editors


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Guest Editor
Pattern Processing Lab, School of Computer Science and Engineering, The University of Aizu, Aizu-Wakamatsu 965-8580, Fukushima, Japan
Interests: pattern recognition; character recognition; image processing; computer vision; human–computer interaction; neurological disease analysis; machine learning
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Guest Editor
Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
Interests: volumetric holographic optical element (VHOE)-based augmented reality (AR) devices, such as transparent projection display, HUD and holo glasses and integral imaging display, hologram image processing

Special Issue Information

Dear Colleagues,

Following the success of the previous Special Issue "Vision- and Sensor-Based Sensing in Human Activity Recognition" (https://www.mdpi.com/journal/sensors/special_issues/Human_Activity), we are pleased to announce the next in the series, entitled "Vision- and Sensor-Based Sensing in Human Activity Recognition—Second Edition".

The goal of this Special Issue is to help to overcome the gap between human activity recognition and its involvement in the development of many important applications, including human–computer interaction (HCI), virtual reality, security, the internet of things (IoT), and healthcare facilities.

Over the past few decades, video- or sensor-based sensing for human activity recognition has received tremendous attention from the research community due to its wide range of applications and the recent advancement of computational performance, camera and sensor technology, and algorithms of machine learning and deep learning.

In this Special Issue on vision- and sensor-based sensing in human activity recognition, we are aiming to publish novel and technically sound research articles that demonstrate theoretical and practical contributions to computer vision, machine learning, AI, sensing, and medical and social issues.

Topics of interest include, but are not limited to, the following: 

Human activity recognition from camera, video, and other relevant sensor data
Non-touch and touch interfaces using human activity
Deep learning approach for human activity recognition
Handwriting activity analysis and recognition
Medical diagnosis and recognition using human activity
Biosignal processing for human activity recognition
Healthcare application using human activity
Virtual reality, augmented reality, and other applications using human activity
Human activity analysis and recognition for social issues
Large datasets on human activity recognition
Current state-of-the-art and future trends of human activity recognition

Prof. Dr. Jungpil Shin
Dr. Young-Suk Hwang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • behavior modeling
  • activity recognition
  • deep learning
  • explainable AI
  • context understanding
  • causality knowledge
  • activity representation

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Published Papers (1 paper)

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Research

21 pages, 1828 KB  
Article
Deep Learning-Based Eye-Writing Recognition with Improved Preprocessing and Data Augmentation Techniques
by Kota Suzuki, Abu Saleh Musa Miah and Jungpil Shin
Sensors 2025, 25(20), 6325; https://doi.org/10.3390/s25206325 - 13 Oct 2025
Viewed by 852
Abstract
Eye-tracking technology enables communication for individuals with muscle control difficulties, making it a valuable assistive tool. Traditional systems rely on electrooculography (EOG) or infrared devices, which are accurate but costly and invasive. While vision-based systems offer a more accessible alternative, they have not [...] Read more.
Eye-tracking technology enables communication for individuals with muscle control difficulties, making it a valuable assistive tool. Traditional systems rely on electrooculography (EOG) or infrared devices, which are accurate but costly and invasive. While vision-based systems offer a more accessible alternative, they have not been extensively explored for eye-writing recognition. Additionally, the natural instability of eye movements and variations in writing styles result in inconsistent signal lengths, which reduces recognition accuracy and limits the practical use of eye-writing systems. To address these challenges, we propose a novel vision-based eye-writing recognition approach that utilizes a webcam-captured dataset. A key contribution of our approach is the introduction of a Discrete Fourier Transform (DFT)-based length normalization method that standardizes the length of each eye-writing sample while preserving essential spectral characteristics. This ensures uniformity in input lengths and improves both efficiency and robustness. Moreover, we integrate a hybrid deep learning model that combines 1D Convolutional Neural Networks (CNN) and Temporal Convolutional Networks (TCN) to jointly capture spatial and temporal features of eye-writing. To further improve model robustness, we incorporate data augmentation and initial-point normalization techniques. The proposed system was evaluated using our new webcam-captured Arabic numbers dataset and two existing benchmark datasets, with leave-one-subject-out (LOSO) cross-validation. The model achieved accuracies of 97.68% on the new dataset, 94.48% on the Japanese Katakana dataset, and 98.70% on the EOG-captured Arabic numbers dataset—outperforming existing systems. This work provides an efficient eye-writing recognition system, featuring robust preprocessing techniques, a hybrid deep learning model, and a new webcam-captured dataset. Full article
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