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As most mathematically justifiable Lagrangian coherent structure detection methods rely on spatial derivatives, their applicability to sparse trajectory data has been limited. For experimental fluid dynamicists and natural scientists…

Fluid Dynamics · Physics 2024-11-20 Nikolas O. Aksamit , Alex P. Encinas-Bartos , George Haller , David E. Rival

Nowadays, in developing countries including Iran, the number of vehicles is increasing due to growing population. This has recently led to waste time getting stuck in traffic, take more time for daily commute, and increase accidents. So it…

Systems and Control · Electrical Eng. & Systems 2023-09-12 Daniel. Firouzimagham , Mohammad. Sabouri , Fatemeh. Adhami

We introduce a diffusion-based approach for generating privacy-preserving digital twins of multi-room indoor environments from depth images only. Central to our approach is a novel Multi-view Overlapped Scene Alignment with Implicit…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Zhixuan Liu , Haokun Zhu , Rui Chen , Jonathan Francis , Soonmin Hwang , Ji Zhang , Jean Oh

This paper presents a vision and perception research dataset collected in Rome, featuring RGB data, 3D point clouds, IMU, and GPS data. We introduce a new benchmark targeting visual odometry and SLAM, to advance the research in autonomous…

Computer Vision and Pattern Recognition · Computer Science 2024-04-18 Leonardo Brizi , Emanuele Giacomini , Luca Di Giammarino , Simone Ferrari , Omar Salem , Lorenzo De Rebotti , Giorgio Grisetti

Motion is a dominant cue in automated driving systems. Optical flow is typically computed to detect moving objects and to estimate depth using triangulation. In this paper, our motivation is to leverage the existing dense optical flow to…

Computer Vision and Pattern Recognition · Computer Science 2019-01-23 Hazem Rashed , Senthil Yogamani , Ahmad El-Sallab , Pavel Krizek , Mohamed El-Helw

The cluster motion of busy multiple elevators is considered to be one of the synchronization phenomena of autonomous oscillators. In this study, we used numerical simulations to quantitatively explore differences in the elevators' dynamics…

Adaptation and Self-Organizing Systems · Physics 2022-09-28 Sakurako Tanida

Smart video sensors for applications related to surveillance and security are IOT-based as they use Internet for various purposes. Such applications include crowd behaviour monitoring and advanced decision support systems operating and…

Computer Vision and Pattern Recognition · Computer Science 2019-06-11 Antoine Rimboux , Rob Dupre , Thomas Lagkas , Panagiotis Sarigiannidis , Paolo Remagnino , Vasileios Argyriou

We propose a mobile crowdsourced sensors selection approach to improve the journey planning service especially in areas where no wireless or vehicular sensors are available. We develop a location estimation model of journey services based…

Computers and Society · Computer Science 2018-12-24 Ahmed Ben Said , Abdelkarim Erradi , Azadeh Ghari Neiat , Athman Bouguettaya

This note explores the idea of utilising a state-space model, congruent with the underlying equations of the Kalman filter with control input, for reconstructing the state of crowdedness in a transit network. The envisaged role of the…

Systems and Control · Computer Science 2018-11-01 Sylwester Arabas , Alexandros E. Papacharalampous

Static information presentation in VR cultural heritage often causes cognitive overload or under-stimulation. We introduce a closed-loop adaptive interface that tailors content depth to real-time visitor behavior through implicit multimodal…

Human-Computer Interaction · Computer Science 2026-03-17 Joseph Damouni , Wadia Tanus , Naomi Unkelos-Shpigel

Frequent monitoring of participant compliance is necessary when conducting large-scale, longitudinal studies to ensure that the collected data is of sufficiently high quality. While the need for achieving high compliance has been…

In the context of Smart City, the dynamic of the presence of people can be analysed using high-dimensional spatio-temporal mobile phone data. In order to find regularities and detect anomalies in the daily profiles, we propose an approach…

Applications · Statistics 2019-07-12 Rodolfo Metulini , Maurizio Carpita

Pedestrian crowds encompass a complex interplay of intentional movements aimed at reaching specific destinations, fluctuations due to personal and interpersonal variability, and interactions with each other and the environment. Previous…

Physics and Society · Physics 2025-03-10 Caspar A. S. Pouw , Geert G. M. van der Vleuten , Alessandro Corbetta , Federico Toschi

Modeling crowd behavior relies on accurate data of pedestrian movements at a high level of detail. Imaging sensors such as cameras provide a good basis for capturing such detailed pedestrian motion data. However, currently available…

Computer Vision and Pattern Recognition · Computer Science 2012-10-11 Stefan Seer , Norbert Brändle , Carlo Ratti

The robustness and integrity of IP networks require efficient tools for traffic monitoring and analysis, which scale well with traffic volume and network size. We address the problem of optimal large-scale flow monitoring of computer…

Systems and Control · Computer Science 2013-06-26 Michael Kallitsis , Stilian Stoev , George Michailidis

We present a strategy capable of describing basic features of the dynamics of crowds. The behaviour of the crowd is considered from a twofold perspective. We examine both the large scale behaviour of the crowd, and phenomena happening at…

Mathematical Physics · Physics 2011-08-09 Joep Evers

Transportation companies and organizations routinely collect huge volumes of passenger transportation data. By aggregating these data (e.g., counting the number of passengers going from a place to another in every 30 minute interval), it…

Databases · Computer Science 2023-10-16 Chrysanthi Kosyfaki , Nikos Mamoulis , Reynold Cheng , Ben Kao

Recent studies on transportation networks have shown that real-time route guidance can inadvertently induce congestion or oscillatory traffic patterns. Nevertheless, such technologies also offer a promising opportunity to manage traffic…

Systems and Control · Electrical Eng. & Systems 2026-01-21 Shaya Garjani , Ashish Cherukuri , Bayu Jayawardhana , Nima Monshizadeh

Accurately estimating urban rail platform occupancy can enhance transit agencies' ability to make informed operational decisions, thereby improving safety, operational efficiency, and customer experience, particularly in the context of…

Computer Vision and Pattern Recognition · Computer Science 2025-08-07 Riccardo Fiorista , Awad Abdelhalim , Anson F. Stewart , Gabriel L. Pincus , Ian Thistle , Jinhua Zhao

Crowd density level estimation is an essential aspect of crowd safety since it helps to identify areas of probable overcrowding and required conditions. Nowadays, AI systems can help in various sectors. Here for safety purposes or many for…

Cryptography and Security · Computer Science 2024-05-14 Mahira Arefin , Md. Anwar Hussen Wadud , Anichur Rahman