Results 51 to 60 of about 1,263,977 (163)

Photometric Calibration and Image Stitching for a Large Field of View Multi-Camera System

open access: yesSensors, 2016
A new compact large field of view (FOV) multi-camera system is introduced. The camera is based on seven tiny complementary metal-oxide-semiconductor sensor modules covering over 160° × 160° FOV.
Yu Lu, Keyi Wang, Gongshu Fan
doaj   +1 more source

Digital Pixel Sensor Array with Logarithmic Delta-Sigma Architecture

open access: yesSensors, 2013
Like the human eye, logarithmic image sensors achieve wide dynamic range easily at video rates, but, unlike the human eye, they suffer from low peak signal-to-noise-and-distortion ratios (PSNDRs).
Jing Li   +2 more
doaj   +1 more source

Post-acceleration internal enhancement technology for streak camera and its nonlinear intensity correction

open access: yesShenzhen Daxue xuebao. Ligong ban
To achieve high dynamic range performance in X-ray streak cameras and precision diagnostics, the theory of post-acceleration internal gain technology in streak cameras is investigated from photon density detection threshold.
GU Li, YANG Fang, YANG Qinlao
doaj   +1 more source

Visual Contrast Enhancement Algorithm Based on Histogram Equalization

open access: yesSensors, 2015
Image enhancement techniques primarily improve the contrast of an image to lend it a better appearance. One of the popular enhancement methods is histogram equalization (HE) because of its simplicity and effectiveness.
Chih-Chung Ting   +4 more
doaj   +1 more source

A Novel Hybrid RF-DC Converter Using CMOS n-Well Process

open access: yesIEEE Access
The use of RF harvesting as a power source for low-power systems, such as wearables, wireless sensor nodes, and Internet of Things, has gained attention. The primary obstacle to develop an effective RF-DC system has been the RF rectifier. The method most
Munir A. Al-Absi   +1 more
doaj   +1 more source

A High Performance Delta-Sigma Modulator for Neurosensing

open access: yesSensors, 2015
Recorded neural data are frequently corrupted by large amplitude artifacts that are triggered by a variety of sources, such as subject movements, organ motions, electromagnetic interferences and discharges at the electrode surface.
Jian Xu   +4 more
doaj   +1 more source

On dynamic range reporting in one dimension

open access: yesProceedings of the thirty-seventh annual ACM symposium on Theory of computing, 2005
We consider the problem of maintaining a dynamic set of integers and answering queries of the form: report a point (equivalently, all points) in a given interval. Range searching is a natural and fundamental variant of integer search, and can be solved using predecessor search. However, for a RAM with w-bit words, we show how to perform updates in O(lg
Christian Worm Mortensen   +2 more
openaire   +2 more sources

Experimental Investigation of Characteristics and Development of Nonlinearity Models for FR1-Range Radio-Frequency Amplifiers

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники
Experimental studies of nonlinear properties of low-power radio-frequency amplifiers similar to those used in 4G/5G mobile communication equipment of the FR1 frequency range are carried out.
V. I. Mordachev   +5 more
doaj   +1 more source

Multi‐defect‐engineering in ZnO/GO heterostructures for optoelectronic synaptic devices with ultra‐high dynamic range and low energy consumption

open access: yesInfoMat
In artificial visual systems, optimizing the dynamic range (DR) of optoelectronic synapses is essential for achieving robust and environment‐adaptive perception.
Zhiyao Zheng   +12 more
doaj   +1 more source

Large-Dynamic-Range Ocular Aberration Measurement Based on Deep Learning with a Shack–Hartmann Wavefront Sensor

open access: yesSensors
The Shack–Hartmann wavefront sensor (SHWFS) is widely utilized for ocular aberration measurement. However, large ocular aberrations caused by individual differences can easily make the spot move out of the range of the corresponding sub-aperture in SHWFS,
Haobo Zhang   +5 more
doaj   +1 more source

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