Results 31 to 40 of about 27,879 (145)
Robust OCC System Optimized for Low-Frame-Rate Receivers
Sensors, 2022 Light emitting diodes (LED) are becoming the dominant lighting elements due to their efficiency. Optical camera communications (OCC), the branch of visible light communications (VLC) that uses video cameras as receivers, is a suitable candidate in ...
Robert-Alexandru Dobre +2 more
doaj +1 more source
Applied Sciences, 2022 Currently, wireless communication systems that use radio frequency are commonly deployed, for example, mobile communication systems, satellite systems, and the Internet of Things (IoT) systems.
Van Linh Nguyen +3 more
doaj +1 more source
A Simplified Model for the Rolling Shutter Based Camera in Optical Camera Communications [PDF]
2019 15th International Conference on Telecommunications (ConTEL), 2019 A simplified model of the camera for optical camera communications (OCC) based on the rolling shutter effect is proposed and experimentally verified. In OCC, the key parameters are the exposure time, which is proportional to the DC gain and inversely proportional to the bandwidth, and the rolling shutter delay or the sampling period.
Xicong Li +5 more
openaire +3 more sources
IEEE Photonics Journal, 2023 The laser spot center positioning is an essential step for camera-based terminal positioning and alignment in a long-distance laser-based underwater optical wireless communication (UOWC) system.
Weijie Liu +4 more
doaj +1 more source
Motion-Aware Optical Camera Communication With Event Cameras
IEEE Robotics and Automation LettersAs the ubiquity of smart mobile devices continues to rise, Optical Camera Communication systems have gained more attention as a solution for efficient and private data streaming. This system utilizes optical cameras to receive data from digital screens via visible light. Despite their promise, most of them are hindered by dynamic factors such as screen
Hang Su +3 more
openaire +2 more sources
Non-Line-of-Sight Optical Camera Communication in a Heterogeneous Reflective Background
IEEE Photonics Journal, 2019 In the last few years, optical camera communication (OCC) has benefited from built-in CMOS image sensors in smart devices. OCC is now considered a candidate for incorporation into IEEE 802.15.7r1. A major study on OCC was conducted for line-of-sight (LOS)
Jenn-Kaie Lain +2 more
doaj +1 more source
Modelization and Characterization of a CMOS Camera as an Optical Real-Time Oscilloscope
IEEE Photonics Journal, 2020 Complementary Metal-Oxide Semiconductor (CMOS) camera sensors are embedded in many consumer electronics products: thanks to the Rolling Shutter (RS) readout mode, they can detect a time-varying light intensity, which is the key to realize Optical Camera ...
Giulio Cossu +2 more
doaj +1 more source
Correlation-based receiver for optical camera communications
Optics Express, 2019 In color-multiplexed optical camera communications (OCC) systems, data acquisition is restricted by the image processing algorithm capability for fast source recognition, region-of-interest (ROI) detection and tracking, packet synchronization within ROI, estimation of inter-channel interference and threshold computation.
Cristo Jurado-Verdu +4 more
openaire +3 more sources
Performance Analysis of a Color-Code-Based Optical Camera Communication System
Applied SciencesIn this study, we present a visible light communication (VLC) system that analyzes the performance of an optical camera communication (OCC) system, utilizing a mobile phone camera as the receiver and a computer monitor as the transmitter.
Hasan Ziya Dinc, Yavuz Erol
doaj +1 more source
IEEE Access, 2021 The need for an accurate indoor positioning system has rapidly increased with the development of large complex malls and underground spaces. As signals from the global positioning system cannot be received inside buildings, only approximate locations can
Soyoung Jeong, Jihyeon Min, Youngil Park
doaj +1 more source