Results 81 to 90 of about 241,679 (299)

Adaptive focal lengths in white light focusing Fresnel lenses enabled by reflective-type and phase-only spatial light modulator

Scientific Reports, 2023
Fresnel zone plates (FZPs) are widely used in integrated optical systems to meet new cutting-edge demands for photonic integration and device miniaturizing. However, their use in applications of cross-scale fabrication still faces several obstacles, such
Pravinraj Selvaraj, Sheng-Le Wang, Tsung-Yi Hou, Cheng-Kai Liu, Ko-Ting Cheng   +4 more
doaj   +1 more source

Non-paraxial design and fabrication of a compact OAM sorter in the telecom infrared

, 2019
A novel optical device is designed and fabricated in order to overcome the limits of the traditional sorter based on log-pol optical transformation for the demultiplexing of optical beams carrying orbital angular momentum (OAM).
Girardi, Marcello, Massari, Michele, Parisi, Giuseppe, Romanato, Filippo, Ruffato, Gianluca, Zontini, Mauro   +5 more
core   +1 more source

Equalization of camera-based channel to mitigate uncertain sampling for optical camera communications.

Optics Express, 2022
The asynchronous nature of optical camera communication makes uncertain sampling a fundamental and inevitable problem that degrades data transmission performance.
K. Dong, X. Ke, Mingjun Wang
semanticscholar   +1 more source

Vision‐Augmented Wearable Interfaces: Bioinspired Approaches for Realistic AI‐Human‐Machine Interaction

Advanced Materials Technologies, EarlyView.
This review presents recent progress in vision‐augmented wearable interfaces that combine artificial vision, soft wearable sensors, and exoskeletal robots. Inspired by biological visual systems, these technologies enable multimodal perception and intelligent human–machine interaction.
Jihun Lee, Gwuidong Ryu, Kisoo Kim, Feng Xu, Won Gu Lee   +4 more
wiley   +1 more source

Empowering and conquering infirmity of visually impaired using AI‐technology equipped with object detection and real‐time voice feedback system in healthcare application

CAAI Transactions on Intelligence Technology, EarlyView., 2023
Abstract The Internet of Things is emerging as a crucial technology in aiding humans and making their lives easier. Among the human population, a large percentage of people suffer from disabilities resulting in challenges in everyday life particularly people with visual disabilities.
Hania Tarik, Shahzad Hassan, Rizwan Ali Naqvi, Saddaf Rubab, Usman Tariq, Monia Hamdi, Hela Elmannai, Ye Jin Kim, Jae‐Hyuk Cha   +8 more
wiley   +1 more source

Secure DFT-Ordered Luminance Method for Parallel Transmission Image-Sensor Based VLC

IEEE Photonics Journal
A secure method is proposed for parallel-transmission (PT) image-sensor (IS) based visible light communication, where $M$ luminance signals in one-dimensional order produced by inverse discrete Fourier transform (IDFT) are mapped in a two-dimensional ...
Fumihito Anno, Koji Kamakura, Masayuki Kinoshita, Takaya Yamazato   +3 more
doaj   +1 more source

Photography Trilateration Indoor Localization with Image Sensor Communication

Sensors, 2019
Localization has become an important aspect in a wide range of mobile services with the integration of the Internet of things and service on demand. Numerous mechanisms have been proposed for localization, most of which are based on the estimation of ...
Nam Tuan Le, Yeong Min Jang
doaj   +1 more source

Optical Camera Communication Performance Evaluation: Review

Iraqi Journal of Computer, Communication, Control and System Engineering, 2020
Recently, optical wireless communication (OWC) technologies focused on a camera or an image sensor receiver have drawn specific attention in areas like the internet, indoor localization, motion detection, and intelligent transportation systems. Besides, panorama sensors are the subject of communications from picture sensors as receptors as the high ...
openaire   +1 more source

The Evolution of Laser‐Induced Damage Patterns in Polymer Stabilized Liquid Crystals: Insights From Morphological Characterization and Thermo‐Driven Simulations

Advanced Optical Materials, EarlyView.
A dual‐domain PSLC architecture enables direct comparison of alignment‐dependent laser damage within a single device. Crack‐like and seal‐like morphologies emerge under different damage conditions, and their evolution is interpreted through quantitative image analysis and heat‐driven simulations.
Dengcheng Chen, Zoey S. Davidson, Brian P. Radka, Selim Elhadj, Liang‐Chy Chien   +4 more
wiley   +1 more source

Multi-Agent Deep Reinforcement Learning for Spectral Efficiency Optimization in Vehicular Optical Camera Communications

IEEE Transactions on Mobile Computing
In this article, we propose a vehicular optical camera communication system that can meet low bit error rate (BER) and ultra-low latency constraints. First, we formulate a sum spectral efficiency optimization problem that aims at finding the speed of ...
Amirul Islam, N. Thomos, Leila Musavian
semanticscholar   +1 more source