Results 21 to 30 of about 586,449 (202)

Radio Weak Gravitational Lensing with VLA and MERLIN [PDF]

, 2009
We carry out an exploratory weak gravitational lensing analysis on a combined VLA and MERLIN radio data set: a deep (3.3 micro-Jy beam^-1 rms noise) 1.4 GHz image of the Hubble Deep Field North.
B. Hoyle, Barger, Bartelmann, Becker, Bertin, Beswick, Biggs, Bondi, Chang, Crittenden, D. J. Bacon, Garn, Garn, Giavalisco, Heavens, Heymans, Hirata, Huterer, Huynh, Högbom, Jarvis, Jarvis, Joachimi, Mackey, Massey, Massey, Massey, Miralda-Escude, Munshi, Muxlow, Muxlow, P. Patel, Pen, R. J. Beswick, Refregier, Refregier, Refregier, Richards, Richards, Schneider, Seymour, T. W. B. Muxlow, White, Wilman   +43 more
core   +2 more sources

3D Gerchberg-Saxton Optical Correlation

IEEE Photonics Journal, 2018
Since Gerchberg–Saxton algorithm was developed, it has been applied in various fields, e.g., optical display and optical tweezers. In this paper, three-dimensional (3D) Gerchberg–Saxton optical correlation is proposed. A 2D image is divided
Wen Chen
doaj   +1 more source

Illumination waveform optimization for time-of-flight range imaging cameras [PDF]

, 2011
Time-of-flight range imaging sensors acquire an image of a scene, where in addition to standard intensity information, the range (or distance) is also measured concurrently by each pixel.
Cree, Michael J., Dorrington, Adrian A., Payne, Andrew D.   +2 more
core   +2 more sources

Image Processing Operators Based on the Gyrator Transform: Generalized Shift, Convolution and Correlation

Photonics, 2019
The gyrator transform (GT) is used for images processing in applications of light propagation. We propose new image processing operators based on the GT, these operators are: Generalized shift, convolution and correlation.
Ronal A. Perez, Juan M. Vilardy O., Cesar O. Torres M.   +2 more
doaj   +1 more source

Registration of Multisensor Images through a Conditional Generative Adversarial Network and a Correlation-Type Similarity Measure

Remote Sensing, 2022
The automatic registration of multisensor remote sensing images is a highly challenging task due to the inherently different physical, statistical, and textural characteristics of the input data.
Luca Maggiolo, David Solarna, Gabriele Moser, Sebastiano Bruno Serpico   +3 more
doaj   +1 more source

Radio-Optical Galaxy Shape Correlations in the COSMOS Field [PDF]

, 2016
We investigate the correlations in galaxy shapes between optical and radio wavelengths using archival observations of the COSMOS field. Cross-correlation studies between different wavebands will become increasingly important for precision cosmology as ...
Brown, Michael L., Harrison, Ian, Tunbridge, Ben   +2 more
core   +2 more sources

Automatic selection of a subset size at vector fields construction [PDF]

, 2015
An algorithm for selection of the size of a correlation kernel at displacement vector field construction by the method of digital image correlation has been proposed.
Cherepanova, M. V., Lyubutin, Pavel Stepanovich, Panin, Sergey Viktorovich, Titkov, V. V.   +3 more
core   +2 more sources

Defocusing digital particle image velocimetry and the three-dimensional characterization of two-phase flows [PDF]

, 2002
Defocusing digital particle image velocimetry (DDPIV) is the natural extension of planar PIV techniques to the third spatial dimension. In this paper we give details of the defocusing optical concept by which scalar and vector information can be ...
Gharib, Morteza, Pereira, Francisco
core   +1 more source

Optoelectronic correlation processors with photorefractive crystals for the storage elements [PDF]

Технологія та конструювання в електронній апаратурі, 2011
The paper presents review of optical and acousto-optic correlation processors that contain photorefractive crystals. Optical correlators are the efficient devices for the image recognition due to the parallel way high operation rate processing of ...
A. Yu. Lipinskii, A. N. Rudiakova, V. V. Danilov   +2 more
doaj   +1 more source

Study on coseismic surface deformation of the 2023 Turkey MW7.8 and MW7.5 double strong earthquakes using optical image correlation method

Dizhi lixue xuebao
Objective  On February 6, 2023, double strong earthquakes of MW7.8 and MW7.5 occurred consecutively within 10 hours in the Kahramanmaraş province in central-southern Turkey.
KANG Wenjun, XU Xiwei
doaj   +1 more source