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367 Results Found

  • Article
  • Open Access
57 Citations
8,900 Views
20 Pages

Automatic Annotation for Human Activity Recognition in Free Living Using a Smartphone

  • Federico Cruciani,
  • Ian Cleland,
  • Chris Nugent,
  • Paul McCullagh and ,
  • Kåre Synnes and
  • Josef Hallberg
  • + 1 author+ 0 author

9 July 2018

Data annotation is a time-consuming process posing major limitations to the development of Human Activity Recognition (HAR) systems. The availability of a large amount of labeled data is required for supervised Machine Learning (ML) approaches, espec...

(This article belongs to the Special Issue Annotation of User Data for Sensor-Based Systems)
  • Article
  • Open Access
8 Citations
4,230 Views
16 Pages

Towards Automatic Object Detection and Activity Recognition in Indoor Climbing

  • Hana Vrzáková,
  • Jani Koskinen,
  • Sami Andberg,
  • Ahreum Lee and
  • Mary Jean Amon

8 October 2024

Rock climbing has propelled from niche sport to mainstream free-time activity and Olympic sport. Moreover, climbing can be studied as an example of a high-stakes perception-action task. However, understanding what constitutes an expert climber is not...

(This article belongs to the Special Issue Sports Sensors for Athlete Motion Tracking and Physiological Monitoring)
  • Feature Paper
  • Article
  • Open Access
22 Citations
10,003 Views
21 Pages

16 February 2022

In recent years, there has been growing interest in automated tracking and detection of sports activities. Researchers have shown that providing activity information to individuals during their exercise routines can greatly help them in achieving the...

  • Article
  • Open Access
45 Citations
7,202 Views
23 Pages

A Semi-Automatic Annotation Approach for Human Activity Recognition

  • Patrícia Bota,
  • Joana Silva,
  • Duarte Folgado and
  • Hugo Gamboa

25 January 2019

Modern smartphones and wearables often contain multiple embedded sensors which generate significant amounts of data. This information can be used for body monitoring-based areas such as healthcare, indoor location, user-adaptive recommendations and t...

(This article belongs to the Special Issue Smartphone-Based Sensors for Posture, Movement Analysis and Human Activity Recognition)
  • Article
  • Open Access
17 Citations
5,547 Views
20 Pages

4 November 2021

Human Activity Recognition (HAR) has become increasingly crucial in several applications, ranging from motion-driven virtual games to automated video surveillance systems. In these applications, sensors such as smart phone cameras, web cameras or CCT...

(This article belongs to the Section Intelligent Sensors)
  • Article
  • Open Access
445 Views
48 Pages

A Cache-Aware Compression Framework: Deriving the Compression Target and Stopping Rule for Transformers on CPU-Class Hardware

  • Mannon Ochilov,
  • Ilyos Khujayarov,
  • Shokhrukhmirzo Kholdorov,
  • Oybek Narzullayev and
  • Muhammadjon Musaev

5 October 2026

In post-training compression of Transformer models, the compression ratio or pruning rate is often predetermined and does not directly take into account the memory capabilities of the target hardware. This work introduces a cache-aware post-training...

(This article belongs to the Special Issue Advances in AI-Driven Perception and Intelligent Control for Autonomous Vehicles)
  • Article
  • Open Access
83 Citations
9,303 Views
18 Pages

Automatic Association of Chats and Video Tracks for Activity Learning and Recognition in Aerial Video Surveillance

  • Riad I. Hammoud,
  • Cem S. Sahin,
  • Erik P. Blasch,
  • Bradley J. Rhodes and
  • Tao Wang

22 October 2014

We describe two advanced video analysis techniques, including video-indexed by voice annotations (VIVA) and multi-media indexing and explorer (MINER). VIVA utilizes analyst call-outs (ACOs) in the form of chat messages (voice-to-text) to associate la...

(This article belongs to the Special Issue Detection and Tracking of Targets in Forward-Looking InfraRed (FLIR) Imagery)
  • Article
  • Open Access
17 Citations
3,996 Views
24 Pages

19 October 2021

Human activity recognition (HAR) based on wearable sensors is a promising research direction. The resources of handheld terminals and wearable devices limit the performance of recognition and require lightweight architectures. With the development of...

(This article belongs to the Special Issue AI-Enabled Advanced Sensing for Human Action and Activity Recognition)
  • Article
  • Open Access
30 Citations
9,009 Views
19 Pages

Automatic Swimming Activity Recognition and Lap Time Assessment Based on a Single IMU: A Deep Learning Approach

  • Erwan Delhaye,
  • Antoine Bouvet,
  • Guillaume Nicolas,
  • João Paulo Vilas-Boas and ,
  • Benoît Bideau and
  • Nicolas Bideau
  • + 1 author+ 0 author

3 August 2022

This study presents a deep learning model devoted to the analysis of swimming using a single Inertial Measurement Unit (IMU) attached to the sacrum. Gyroscope and accelerometer data were collected from 35 swimmers with various expertise levels during...

(This article belongs to the Special Issue Wearables and Computer Vision for Sports Motion Analysis)
  • Article
  • Open Access
3 Citations
2,081 Views
24 Pages

9 December 2025

Children with autism spectrum disorder (ASD) often display atypical emotional expressions and physiological responses, making emotion recognition challenging. This study proposes a multimodal recognition model employing a late fusion framework combin...

(This article belongs to the Section Biomedical Sensors)
  • Editorial
  • Open Access
26 Citations
7,745 Views
7 Pages

28 October 2014

Here we give context to the Special Issue on “Detection and Tracking of Targets in Forward-Looking InfraRed (FLIR) Imagery” in Sensors. We start with an introduction to the role of infrared images in today’s vision-based applications, by outlining th...

(This article belongs to the Special Issue Detection and Tracking of Targets in Forward-Looking InfraRed (FLIR) Imagery)
  • Article
  • Open Access
9 Citations
4,768 Views
21 Pages

14 June 2020

This paper aims to design an online, low-latency, and high-performance speech recognition system using a bidirectional long short-term memory (BLSTM) acoustic model. To achieve this, we adopt a server-client model and a context-sensitive-chunk-based...

(This article belongs to the Special Issue Intelligent Speech and Acoustic Signal Processing)
  • Article
  • Open Access
5 Citations
3,181 Views
15 Pages

Speech Recognition for Task Domains with Sparse Matched Training Data

  • Byung Ok Kang,
  • Hyeong Bae Jeon and
  • Jeon Gue Park

4 September 2020

We propose two approaches to handle speech recognition for task domains with sparse matched training data. One is an active learning method that selects training data for the target domain from another general domain that already has a significant am...

(This article belongs to the Special Issue Intelligent Speech and Acoustic Signal Processing)
  • Review
  • Open Access
183 Citations
25,840 Views
30 Pages

22 November 2020

Underwater acoustics has been implemented mostly in the field of sound navigation and ranging (SONAR) procedures for submarine communication, the examination of maritime assets and environment surveying, target and object recognition, and measurement...

(This article belongs to the Section Artificial Intelligence)
  • Article
  • Open Access
38 Citations
5,325 Views
34 Pages

Feature-Based Information Retrieval of Multimodal Biosignals with a Self-Similarity Matrix: Focus on Automatic Segmentation

  • João Rodrigues,
  • Hui Liu,
  • Duarte Folgado,
  • David Belo and ,
  • Tanja Schultz and
  • Hugo Gamboa
  • + 1 author+ 0 author

19 December 2022

Biosignal-based technology has been increasingly available in our daily life, being a critical information source. Wearable biosensors have been widely applied in, among others, biometrics, sports, health care, rehabilitation assistance, and edutainm...

(This article belongs to the Section Biosensors and Healthcare)
  • Article
  • Open Access
10 Views
48 Pages

PadSink-Track: A Calibrated Framework for Padding-Sink-Preserving, Alignment-Tracked Selective Cross-Attention Key–Value Cache Access in CPU-Based Whisper Speech Recognition

  • Mannon Ochilov,
  • Muhammadjon Musaev,
  • Shukrullo Kakharov,
  • Dilorom Nabieva and ,
  • Sherzod Abdullaev,
  • Ulugbek Kubayev and
  • Ilyos Khujayarov
  • + 2 authors+ 0 author

To generate each token, the Whisper decoder re-reads the encoder’s 1500-position cross-attention key–value (KV) cache on the CPU. In the Whisper-medium model, this cache occupies 281 MiB; for short recordings, 74–82% of it consists...

(This article belongs to the Special Issue AI-Driven Software Engineering and Intelligent Systems)
  • Article
  • Open Access
6 Citations
4,919 Views
19 Pages

21 November 2021

In sensor-based human activity recognition, many methods based on convolutional neural networks (CNNs) have been proposed. In the typical CNN-based activity recognition model, each class is treated independently of others. However, actual activity cl...

(This article belongs to the Topic Artificial Intelligence in Sensors)
  • Article
  • Open Access
15 Citations
6,575 Views
27 Pages

16 September 2022

Smart devices, such as smartphones, smartwatches, etc., are examples of promising platforms for automatic recognition of human activities. However, it is difficult to accurately monitor complex human activities on these platforms due to interclass pa...

(This article belongs to the Special Issue Advances in Artificial Intelligence (AI)-Driven Data Analytics)
  • Article
  • Open Access
25 Citations
5,525 Views
16 Pages

10 October 2023

Sensor-based human activity recognition aims to classify human activities or behaviors according to the data from wearable or embedded sensors, leading to a new direction in the field of Artificial Intelligence. When the activities become high-level...

(This article belongs to the Section Intelligent Sensors)
  • Article
  • Open Access
2 Citations
1,844 Views
19 Pages

Automatic Removal of Physiological Artifacts in OPM-MEG: A Framework of Channel Attention Mechanism Based on Magnetic Reference Signal

  • Yong Li,
  • Dawei Wang,
  • Hao Lu,
  • Yuyu Ma and ,
  • Chunhui Wang,
  • Binyi Su,
  • Jianzhi Yang,
  • Fuzhi Cao and
  • Xiaolin Ning
  • + 4 authors+ 0 author

9 October 2025

The high spatiotemporal resolution of optically pumped magnetometers (OPMs) makes them an essential tool for functional brain imaging, enabling accurate recordings of neuronal activity. However, physiological signals such as eye blinks and cardiac ac...

(This article belongs to the Section Wearable Biosensors)
  • Review
  • Open Access
15 Citations
5,071 Views
18 Pages

15 November 2018

Recognition of human actions form videos has been an active area of research because it has applications in various domains. The results of work in this field are used in video surveillance, automatic video labeling and human-computer interaction, am...

(This article belongs to the Special Issue Deep Learning-Based Image Sensors)
  • Article
  • Open Access
33 Citations
7,632 Views
14 Pages

Context-Aware Human Activity Recognition in Industrial Processes

  • Friedrich Niemann,
  • Stefan Lüdtke,
  • Christian Bartelt and
  • Michael ten Hompel

25 December 2021

The automatic, sensor-based assessment of human activities is highly relevant for production and logistics, to optimise the economics and ergonomics of these processes. One challenge for accurate activity recognition in these domains is the context-d...

(This article belongs to the Special Issue Sensors Technology and Machine Learning for Human Activity Recognition)
  • Article
  • Open Access
19 Citations
4,565 Views
20 Pages

Marfusion: An Attention-Based Multimodal Fusion Model for Human Activity Recognition in Real-World Scenarios

  • Yunhan Zhao,
  • Siqi Guo,
  • Zeqi Chen,
  • Qiang Shen and ,
  • Zhengyuan Meng and
  • Hao Xu
  • + 1 author+ 0 author

26 May 2022

Human Activity Recognition(HAR) plays an important role in the field of ubiquitous computing, which can benefit various human-centric applications such as smart homes, health monitoring, and aging systems. Human Activity Recognition mainly leverages...

(This article belongs to the Special Issue Sensor-Based Human Activity Recognition in Real-World Scenarios)
  • Article
  • Open Access
4 Citations
2,076 Views
25 Pages

26 June 2025

The adoption of automation technologies across various industries has significantly increased in recent years. Despite the widespread integration of robotics in many sectors, the construction industry remains predominantly reliant on manual labour. T...

(This article belongs to the Section Intelligent Sensors)
  • Article
  • Open Access
433 Views
25 Pages

20 August 2026

This study proposes a stand-alone automatic wild boar capture system using artificial intelligence to reduce damage caused by wild boars. First, a data collection device using a low-cost microcontroller capable of running deep learning models with co...

(This article belongs to the Special Issue Data Sensing Techniques and Processing Algorithms for Smart and Sustainable Agriculture)
  • Article
  • Open Access
9 Citations
4,761 Views
18 Pages

Multidisciplinary ML Techniques on Gesture Recognition for People with Disabilities in a Smart Home Environment

  • Christos Panagiotou,
  • Evanthia Faliagka,
  • Christos P. Antonopoulos and
  • Nikolaos Voros

17 January 2025

Gesture recognition has a crucial role in Human–Computer Interaction (HCI) and in assisting the elderly to perform automatically their everyday activities. In this paper, three methods for gesture recognition and computer vision were implemente...

  • Article
  • Open Access
15 Citations
9,338 Views
25 Pages

A Hybrid Approach to Recognising Activities of Daily Living from Object Use in the Home Environment

  • Isibor Kennedy Ihianle,
  • Usman Naeem,
  • Syed Islam and
  • Abdel-Rahman Tawil

Accurate recognition of Activities of Daily Living (ADL) plays an important role in providing assistance and support to the elderly and cognitively impaired. Current knowledge-driven and ontology-based techniques model object concepts from assumption...

(This article belongs to the Special Issue Sensor-Based Activity Recognition and Interaction)
  • Article
  • Open Access
22 Citations
6,679 Views
18 Pages

Monitoring Student Activities with Smartwatches: On the Academic Performance Enhancement

  • Oscar Herrera-Alcántara,
  • Ari Yair Barrera-Animas,
  • Miguel González-Mendoza and
  • Félix Castro-Espinoza

3 April 2019

Motivated by the importance of studying the relationship between habits of students and their academic performance, daily activities of undergraduate participants have been tracked with smartwatches and smartphones. Smartwatches collect data together...

(This article belongs to the Special Issue Artificial Intelligence and Sensors)
  • Article
  • Open Access
16 Citations
4,035 Views
14 Pages

20 January 2022

Wrist-worn devices equipped with accelerometers constitute a non-intrusive way to achieve active and assisted living (AAL) goals, such as automatic journaling for self-reflection, i.e., lifelogging, as well as to provide other services, such as gener...

(This article belongs to the Special Issue Feature Papers in the Internet of Things Section 2022)
  • Article
  • Open Access
8 Citations
6,322 Views
16 Pages

Hierarchical Activity Recognition Using Smart Watches and RGB-Depth Cameras

  • Zhen Li,
  • Zhiqiang Wei,
  • Lei Huang,
  • Shugang Zhang and
  • Jie Nie

15 October 2016

Human activity recognition is important for healthcare and lifestyle evaluation. In this paper, a novel method for activity recognition by jointly considering motion sensor data recorded by wearable smart watches and image data captured by RGB-Depth...

(This article belongs to the Special Issue Body Worn Behavior Sensing)
  • Article
  • Open Access
101 Citations
8,038 Views
16 Pages

15 October 2019

Smart Homes are generally considered the final solution for living problem, especially for the health care of the elderly and disabled, power saving, etc. Human activity recognition in smart homes is the key to achieving home automation, which enable...

(This article belongs to the Special Issue From Sensors to Ambient Intelligence for Health and Social Care)
  • Article
  • Open Access
12 Citations
2,947 Views
12 Pages

5 November 2021

Brain activity recognition based on electroencephalography (EEG) marks a major research orientation in intelligent medicine, especially in human intention prediction, human–computer control and neurological diagnosis. The literature research mainly f...

(This article belongs to the Topic Machine and Deep Learning)
  • Article
  • Open Access
60 Citations
7,044 Views
17 Pages

6 June 2018

Mobile activity recognition is significant to the development of human-centric pervasive applications including elderly care, personalized recommendations, etc. Nevertheless, the distribution of inertial sensor data can be influenced to a great exten...

(This article belongs to the Special Issue Wearable and Ambient Sensors for Healthcare and Wellness Applications 2018)
  • Article
  • Open Access
4 Citations
5,069 Views
13 Pages

27 November 2015

In this paper, we introduce a research project on investigating the relation of computers and humans in the field of wearable activity recognition. We use an interdisciplinary approach, combining general philosophical assumptions on the mediating cha...

(This article belongs to the Special Issue Computing and Philosophy: Papers from IACAP 2014)
  • Article
  • Open Access
3 Citations
1,663 Views
29 Pages

20 January 2026

Electroencephalography (EEG) has attracted significant attention as an effective modality for interaction between the physical and virtual worlds, with EEG-based person identification serving as a key gateway to such applications. Despite substantial...

(This article belongs to the Section Biomedical Sensors)
  • Article
  • Open Access
3 Citations
1,713 Views
14 Pages

Patterns of Vocal Activity of the Chinese Bamboo Partridge Using BirdNET Analyzer

  • Jinjuan Mei,
  • Lingna Li,
  • Wenwen Zhang,
  • Jie Shi and ,
  • Shengjun Zhao,
  • Fan Yong,
  • Xiaomin Ge,
  • Wenjun Tong,
  • Xu Zhou and
  • Peng Cui
  • + 5 authors+ 0 author

19 January 2026

Passive acoustic monitoring (PAM) is an automatic and non-invasive method for long-term monitoring of bird vocal activity. PAM generates a large amount of data, and the automatic recognition of data poses significant challenges. BirdNET is a free-to-...

(This article belongs to the Section Birds)
  • Article
  • Open Access
4 Citations
3,290 Views
19 Pages

Towards a Clustering Guided Hierarchical Framework for Sensor-Based Activity Recognition

  • Aiguo Wang,
  • Shenghui Zhao,
  • Huan-Chao Keh,
  • Guilin Chen and
  • Diptendu Sinha Roy

20 October 2021

Human activity recognition plays a prominent role in numerous applications like smart homes, elderly healthcare and ambient intelligence. The complexity of human behavior leads to the difficulty of developing an accurate activity recognizer, especial...

(This article belongs to the Special Issue Advanced Wireless Sensing Techniques for Communication)
  • Article
  • Open Access
2,475 Views
20 Pages

Automatic Vehicle Recognition: A Practical Approach with VMMR and VCR

  • Andrei Istrate,
  • Madalin-George Boboc,
  • Daniel-Tiberius Hritcu,
  • Florin Rastoceanu and ,
  • Constantin Grozea and
  • Mihai Enache
  • + 1 author+ 0 author

18 December 2025

Background: Automatic vehicle recognition has recently become an area of great interest, providing substantial support for multiple use cases, including law enforcement and surveillance applications. In real traffic conditions, where for various reas...

(This article belongs to the Topic State-of-the-Art Object Detection, Tracking, and Recognition Techniques)
  • Article
  • Open Access
8 Citations
2,883 Views
16 Pages

Rate-Invariant Modeling in Lie Algebra for Activity Recognition

  • Malek Boujebli,
  • Hassen Drira,
  • Makram Mestiri and
  • Imed Riadh Farah

10 November 2020

Human activity recognition is one of the most challenging and active areas of research in the computer vision domain. However, designing automatic systems that are robust to significant variability due to object combinations and the high complexity o...

(This article belongs to the Special Issue Recent Advances in Motion Analysis)
  • Article
  • Open Access
13 Citations
5,454 Views
18 Pages

Copper Strip Surface Defect Detection Model Based on Deep Convolutional Neural Network

  • Yanghuan Xu,
  • Dongcheng Wang,
  • Bowei Duan,
  • Huaxin Yu and
  • Hongmin Liu

25 September 2021

Surface defect automatic detection has great significance for copper strip production. The traditional machine vision for surface defect automatic detection of copper strip needs artificial feature design, which has a long cycle, and poor ability of...

(This article belongs to the Special Issue Deep Convolutional Neural Networks)
  • Article
  • Open Access
43 Citations
7,894 Views
20 Pages

10 July 2014

Application of sensor-based technology within activity monitoring systems is becoming a popular technique within the smart environment paradigm. Nevertheless, the use of such an approach generates complex constructs of data, which subsequently requi...

(This article belongs to the Special Issue Select Papers from UCAmI & IWAAL 2013 - the 7th International Conference on Ubiquitous Computing and Ambient Intelligence & the 5th International Workshop on Ambient Assisted Living (UCAmI & IWAAL 2013: Pervasive Sensing Solutions)
  • Article
  • Open Access
7 Citations
3,039 Views
23 Pages

Deep Learning for Skeleton-Based Human Activity Segmentation: An Autoencoder Approach

  • Md Amran Hossen,
  • Abdul Ghani Naim and
  • Pg Emeroylariffion Abas

Automatic segmentation is essential for enhancing human activity recognition, especially given the limitations of publicly available datasets that often lack diversity in daily activities. This study introduces a novel segmentation method that utiliz...

(This article belongs to the Section Information and Communication Technologies)
  • Article
  • Open Access
7 Citations
5,562 Views
15 Pages

3 October 2018

Micro expressions are usually subtle and brief facial expressions that humans use to hide their true emotional states. In recent years, micro-expression recognition has attracted wide attention in the fields of psychology, mass media, and computer vi...

(This article belongs to the Special Issue Advanced Intelligent Imaging Technology)
  • Article
  • Open Access
10 Citations
3,621 Views
12 Pages

On the Problem of State Recognition in Injection Molding Based on Accelerometer Data Sets

  • Julian Brunthaler,
  • Patryk Grabski,
  • Valentin Sturm,
  • Wolfgang Lubowski and
  • Dmitry Efrosinin

17 August 2022

The last few decades have been characterised by a very active application of smart technologies in various fields of industry. This paper deals with industrial activities, such as injection molding, where it is required to monitor continuously the ma...

(This article belongs to the Special Issue Internet of Mobile Things and Wireless Sensor Networks)
  • Article
  • Open Access
30 Citations
5,216 Views
22 Pages

Leveraging Wearable Sensors for Human Daily Activity Recognition with Stacked Denoising Autoencoders

  • Qin Ni,
  • Zhuo Fan,
  • Lei Zhang,
  • Chris D. Nugent and ,
  • Ian Cleland,
  • Yuping Zhang and
  • Nan Zhou
  • + 2 authors+ 0 author

8 September 2020

Activity recognition has received considerable attention in many research fields, such as industrial and healthcare fields. However, many researches about activity recognition have focused on static activities and dynamic activities in current litera...

(This article belongs to the Section Sensor Networks)
  • Article
  • Open Access
18 Citations
4,508 Views
11 Pages

12 July 2022

Along with automatic speech recognition, many researchers have been actively studying speech emotion recognition, since emotion information is as crucial as the textual information for effective interactions. Emotion can be divided into categorical e...

(This article belongs to the Section A: Computer Science)
  • Article
  • Open Access
6 Citations
3,667 Views
12 Pages

Smart Care Using a DNN-Based Approach for Activities of Daily Living (ADL) Recognition

  • Muchun Su,
  • Diana Wahyu Hayati,
  • Shaowu Tseng,
  • Jiehhaur Chen and
  • Hsihsien Wei

22 December 2020

Health care for independently living elders is more important than ever. Automatic recognition of their Activities of Daily Living (ADL) is the first step to solving the health care issues faced by seniors in an efficient way. The paper describes a D...

(This article belongs to the Special Issue Smart Services: Artificial Intelligence in Service Systems)
  • Article
  • Open Access
8 Citations
4,449 Views
16 Pages

14 March 2022

The cyclic alternating pattern is the periodic electroencephalogram activity occurring during non-rapid eye movement sleep. It is a marker of sleep instability and is correlated with several sleep-related pathologies. Considering the connection betwe...

(This article belongs to the Special Issue Human-Centric Sensing Technology and Systems)
  • Article
  • Open Access
16 Citations
3,564 Views
19 Pages

Emotions are an inextricably linked component of human life. Automatic emotion recognition can be widely used in brain–computer interfaces. This study presents a new model for automatic emotion recognition from electroencephalography signals based on...

(This article belongs to the Section Bioelectronics)
  • Article
  • Open Access
11 Citations
5,517 Views
15 Pages

Automated Schedule and Cost Control Using 3D Sensing Technologies

  • Ahmed R. ElQasaby,
  • Fahad K. Alqahtani and
  • Mohammed Alheyf

5 January 2023

Nowadays, many construction projects in KSA still struggle with cost overruns and delay in activities. Therefore, automatic monitoring approaches are needed in the construction progress monitoring domain (CPM) to address these concerns. Thus, this pa...

(This article belongs to the Topic Advances in Construction and Project Management)

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