Results 51 to 60 of about 2,287 (226)

Adaptive Thresholding Scheme for Demodulation of Rolling-Shutter Images Obtained in CMOS Image Sensor Based Visible Light Communications

IEEE Photonics Journal, 2018
Light-emitting-diode transmitter and complementary-metal–oxide–semicon-ductor (CMOS) image sensor receiver based visible light communication is a promising scheme for an optical wireless communication. During the demodulation of the rolling
Chi-Wai Chow, Yen-Chun Liu, Ruei-Jie Shiu, Chien-Hung Yeh   +3 more
doaj   +1 more source

Structure and Motion Estimation from Rolling Shutter Video [PDF]

, 2011
The majority of consumer quality cameras sold today have CMOS sensors with rolling shutters. In a rolling shutter camera, images are read out row by row, and thus each row is exposed during a different time interval.
Johan Hedborg, Michael Felsberg, Hedborg, Johan, Hedborg, Johan,, Per-Erik Forssen, Erik Ringaby, Ringaby, Erik,, Felsberg, Michael, Ringaby, Erik, Forssén, Per-Erik,, Forssén, Per-Erik, Felsberg, Michael,   +11 more
core   +1 more source

Vibration Extraction Using Rolling Shutter Cameras

, 2016
Measurements of vibrations, such as sound hitting an object or running a motor, are widely used in industry and research. Traditional methods need either direct contact with the object or a laser vibrometer.
Zhou, Meng
core   +2 more sources

Exploiting the Rolling Shutter Read-Out Time for ENF-Based Camera Identification

Applied Sciences, 2023
The electric network frequency (ENF) is a signal that varies over time and represents the frequency of the energy supplied by a mains power system. It continually varies around a nominal value of 50/60 Hz as a result of fluctuations over time in the ...
Ericmoore Ngharamike, Li-Minn Ang, Kah Phooi Seng, Mingzhong Wang   +3 more
doaj   +1 more source

High-Speed Transmission Based on Grid-Patterned Data Images in Display-Camera Visible Light Communication

IEEE Photonics Journal
This study focuses on visible light communication using a high-speed display and rolling shutter camera. In conventional methods, data are arranged in vertical stripes, but the low transmission rate is a critical challenge.
Chieri Okawa, Hiraku Okada, Tadahiro Wada   +2 more
doaj   +1 more source

Development of Gentle Slope Light Guide Structure in a 3.4 μm Pixel Pitch Global Shutter CMOS Image Sensor with Multiple Accumulation Shutter Technology

Sensors, 2017
CMOS image sensors (CISs) with global shutter (GS) function are strongly required in order to avoid image degradation. However, CISs with GS function have generally been inferior to the rolling shutter (RS) CIS in performance, because they have more ...
Hiroshi Sekine, Masahiro Kobayashi, Yusuke Onuki, Kazunari Kawabata, Toshiki Tsuboi, Yasushi Matsuno, Hidekazu Takahashi, Shunsuke Inoue, Takeshi Ichikawa   +8 more
doaj   +1 more source

Frame recovery using multiple images in rolling shutter based systems

IET Optoelectronics, 2023
An algorithm for recovering transmitted static identifiers (IDs) in rolling shutter based Optical Camera Communication systems is proposed by the authors, considering a system comprised of a camera and a circular light source.
Miguel Rêgo, Joaquin Perez, Pedro Fonseca, Luís Nero Alves   +3 more
doaj   +1 more source

Design and simulation of the control circuit for a CMOS imaging sensor with high resolution and dual shutter mode

Tongxin xuebao, 2006
A CMOS imaging sensor with high resolution and dual shutter mode for space information acquisition was presented.The theoretical operation principles and characters of rolling shutter and synchronous shutter for the CMOS imaging sensor were analyzed and ...
ZHANG Chi, YU Shi-jie, YOU Zheng
doaj   +2 more sources

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

Advanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver, Iker Alfonso, Eneko Barba, Javier León, José Antonio García, Iñaki Zalakain, Iván Fernández Martínez, Arley García‐Carrero, Christian Almeyda, Daniel Salcedo   +9 more
wiley   +1 more source

The natural history of periodontal disease—Part 2: In populations with access to dental care: The Studies of Health in Pomerania (SHIP)

Periodontology 2000, EarlyView., 2023
Abstract In this descriptive analysis of the 21‐year follow‐up data from the SHIP‐START cohort and the 7‐year follow‐up data from the SHIP‐TREND cohort, we report the progression of clinical attachment levels (CAL), age effects on CAL change, and a detailed description of CAL progression and remission. At baseline, 4307 and 4420 persons participated in
Thomas Kocher, Peter Meisel, Reiner Biffar, Henry Völzke, Birte Holtfreter   +4 more
wiley   +1 more source