Results 61 to 70 of about 3,034 (167)

The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study [PDF]

, 2016
In this paper we report the results of an X-ray monitoring campaign on the heavily obscured Seyfert galaxy Markarian 3 carried out between the fall of 2014 and the spring of 2015 with NuSTAR, Suzaku and XMM-Newton.
Arevalo, P., Awaki, H., Bauer, F. E., Bianchi, S., Boggs, S. E., Brandt, W. N., Brightman, M., Christensen, F. E., Craig, W. W., Forster, K., Guainazzi, M., Hailey, C. J., Harrison, F., Koss, M., Longinotti, A., Marinucci, A., Markwardt, C., Matt, G., Reynolds, C. S., Ricci, C., Risaliti, G., Stern, D., Svoboda, J., Walton, D., Zhang, W.   +24 more
core   +2 more sources

Evaluation of Pulse‐Shaped Waveform Modulation for Event Camera‐Based OCC Systems

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study presents an event camera‐based optical camera communication (OCC) system using a novel pulse‐shaped waveform modulation to exploit the camera's high temporal resolution and sensitivity. The system achieves error‐free links under controlled indoor conditions, with a bit error rate (BER) below 3.13 ×$\times$ 10−3$^{-3}$ at data rates of 100 Hz.
Jaime Aranda Cubillo, Victor Guerra, Cesar Azurdia‐Meza, Jose Rabadan, Rafael Perez‐Jimenez   +4 more
wiley   +1 more source

Performance enhancement of optical camera communication system using optical camera communication coding and region‐of‐interest detection

IET Optoelectronics, 2021
Optical camera communication (OCC) is considered an important transmission scheme in implementing indoor navigation, beacons, and other Internet of Things applications.
Duy Thong Nguyen, Youngil Park
doaj   +1 more source

The Way to Modern Shutter Speed Measurement Methods: A Historical Overview

Sensors, 2022
Exposure time is a fundamental parameter for the photographer when the photo is composed, and the exact length of the exposure may be an essential determinant of performance in certain camera-based applications, e.g., optical camera communication (OCC ...
Gyula Simon, Gergely Vakulya, Márk Rátosi   +2 more
doaj   +1 more source

Towards a Scalable Hardware/Software Co-Design Platform for Real-time Pedestrian Tracking Based on a ZYNQ-7000 Device [PDF]

, 2017
Currently, most designers face a daunting task to research different design flows and learn the intricacies of specific software from various manufacturers in hardware/software co-design.
Buckley, Kevan, Sillitoe, Ian, Yang, Shufan, Yu, Zheqi   +3 more
core   +1 more source

CNN‐Based Human Detection and Identification in Indoor Optical Camera Communication Systems Using a Wearable LED Strip

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
In this paper, we present an optical camera communication (OCC) system utilising a deep learning for indoor communication and monitoring with wearable LED strips and cameras. Specifically, we employ the YOLOv8 object detection model, based on convolutional neural networks (CNNs), to reliably detect a yellow safety jacket equipped with an LED strip in ...
Eleni Niarchou, Atiya Fatima Usmani, Vicente Matus, Jose Rabadan, Victor Guerra, Luis Nero Alves, Rafael Perez‐Jimenez   +6 more
wiley   +1 more source

Real-Time Patient Indoor Health Monitoring and Location Tracking with Optical Camera Communications on the Internet of Medical Things

Applied Sciences
Optical Camera Communication (OCC) is an emerging technology that has attracted research interest in recent decades. Unlike previous communication technologies, OCC uses visible light as the medium to transmit data from receivers and cameras to receive ...
Herfandi Herfandi, Ones Sanjerico Sitanggang, Muhammad Rangga Aziz Nasution, Huy Nguyen, Yeong Min Jang   +4 more
doaj   +1 more source

Deep Learning for Optical Vehicular Communication

IEEE Access, 2020
In this paper, we consider the current status and technical issues involved in the use of optical camera communication (OCC)/visible light communication (VLC) technologies in vehicular communication systems.
Tung Lam Pham, Md. Shahjalal, Van Bui, Yeong Min Jang   +3 more
doaj   +1 more source

An Optical Camera Communication Using Novel Hybrid Frequency Shift and Pulse Width Modulation Technique for Li-Fi

Computation, 2022
With an increase in network-connected devices, the existing Radio Frequency (RF) spectrum is getting highly saturated. Non-RF-based communication systems have recently garnered attention as they can be considered an alternative to RF-based systems for ...
Sanket Salvi, Geetha Vasantha
doaj   +1 more source

Time Span of an Image Frame Using a CMOS Sensor in Rolling Shutter‐Based Optical Camera Communications

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
In this paper, the use of CMOS image sensors as receivers in a rolling shutter optical camera communication system is addressed, analysing the internal working principles that dominate the registration of the incoming light signals and the digital image acquisition.
Raul Zamorano‐Illanes, Zabih Ghassemlooy, Xicong Li, Othman Younus, Stanislav Zvánovec, Ismael Soto   +5 more
wiley   +1 more source