Results 21 to 30 of about 16,724,170 (299)

Optical Correlators for Cryptosystems and Image Recognition: A Review

open access: yesSensors, 2023
Optical correlators are efficient optical systems that have gained a wide range of applications both in image recognition and encryption, due to their special properties that benefit from the optoelectronic setup instead of an all-electronic one. This paper presents, to the best of our knowledge, the most extensive review of optical correlators to date.
openaire   +4 more sources

Demodulation of Spatial Carrier Images: Performance Analysis of Several Algorithms Using a Single Image [PDF]

open access: yes, 2013
http://link.springer.com/article/10.1007%2Fs11340-013-9741-6#Optical full-field techniques have a great importance in modern experimental mechanics.
Esquis, P.   +19 more
core   +1 more source

High optical contrast nanoimprinted speckle patterns for digital image correlation analysis

open access: yesMicro and Nano Engineering, 2022
For the characterization of the mechanical deformation of materials at microscopic length scales, image processing of a high-quality surface pattern was used.
E.C. Kursun   +4 more
doaj   +1 more source

Multi-resolution, multi-sensor image fusion: general fusion framework [PDF]

open access: yes, 2011
Multi-resolution image fusion also known as pansharpening aims to include spatial information from a high resolution image, e.g. panchromatic or Synthetic Aperture Radar (SAR) image, into a low resolution image, e.g.
Palubinskas, Gintautas   +3 more
core   +1 more source

Study of image characteristics on digital image correlation error assessment [PDF]

open access: yes, 2009
In this paper, errors related to digital image correlation (DIC) technique applied to measurements of displacements are estimated. This work is based on the generation of synthetic images representative of real speckle patterns.
Fazzini, Marina   +7 more
core   +1 more source

River Surface Velocimetry Based on Virtual River Dataset and Modulated-RAFT

open access: yesIEEE Access, 2023
In recent years, there has been a surge of interest in image-based velocimetry methods for river surface velocity (RSV) estimation due to their efficiency and accuracy, including large-scale particle image velocimetry (LSPIV), space-time image ...
Yixin Wu   +5 more
doaj   +1 more source

Results of the Optical Downlink Experiment KIODO from OICETS Satellite to Optical Ground Station Oberpfaffenhofen (OGS-OP) [PDF]

open access: yes, 2007
Optical LEO downlinks from the Japanese OICETS to the optical ground station built by the German Aerospace Center (DLR) near Munich have been performed. This was the first optical LEO downlink on European grounds.
Perlot, Nicolas   +13 more
core   +1 more source

Objective speckle velocimetry for autonomous vehicle odometry [PDF]

open access: yes, 2012
Speckle velocimetry is investigated as a means of determining odometry data with potential for application on autonomous robotic vehicles. The technique described here relies on the integration of translation measurements made by normalized cross ...
Charrett, Thomas O. H.   +3 more
core   +1 more source

Applications of polymer optical fibre grating sensors to condition monitoring of textiles [PDF]

open access: yes, 2009
Fibre Bragg gratings (FBGs) in polymer optical fibres (POFs) have been used to measure the strain in a woven textile. FBGs in both POFs and silica optical fibres were attached to a woven textile specimen, and their performance characterised.
Ye, Chen Chun   +29 more
core   +1 more source

Geometrical optics in correlated imaging systems [PDF]

open access: yesPhysical Review A, 2005
We discuss the geometrical optics of correlated imaging for two kinds of spatial correlations corresponding, respectively, to a classical thermal light source and a quantum two-photon entangled source. Due to the different features in the second-order spatial correlation, the two sources obey different imaging equations.
De-Zhong Cao, Jun Xiong, Kaige Wang
openaire   +1 more source

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