Results 61 to 70 of about 1,689,718 (367)

Speckle Noise-Free Interconnective Holographic Projection

Photonics, 2022
Generally, speckle noise is regarded as unavoidable in holographic projection, and it results from unexpected high spatial frequency components of diffracted light at the sharp edge of pixel openings in a spatial light modulator. Speckle noise typically reduces image contrast and degrades the image quality of the holographic projection.
Hosung Jeon, Joonku Hahn
openaire   +2 more sources

Speckle Statistics in Adaptively Corrected Images

, 2005
(abridged) Imaging observations are generally affected by a fluctuating background of speckles, a particular problem when detecting faint stellar companions at small angular separations.
Aime C., Boccaletti A., Canales V. F., Dainty J. C., Dainty J. C., Fried D. L., James R. Graham, Labeyrie A., Labeyrie A., Michael P. Fitzgerald, Roddier F., Scaddan R. J., Veran J.-P., Vernin J.   +13 more
core   +1 more source

Suppression of Speckle Noise in Digital Holography With Spatial and Temporal Domain Depolarization

IEEE Access, 2020
Speckle noise in digital holography has a great influence on image quality, and one of the reasons for the formation of speckle noise is that the degree of coherence for the reference light and the object light is too high and unnecessary noise is ...
Tongyao Du, Yong Kong, Xinlei Qian, Wei Ding, Zhenwei Wang   +4 more
doaj   +1 more source

Observations of Binary Stars with the Differential Speckle Survey Instrument. II. Hipparcos Stars Observed in 2010 January and June [PDF]

, 2011
The results of 497 speckle observations of Hipparcos stars and selected other targets are presented. Of these, 367 were resolved into components and 130 were unresolved.
Anderson, Lisa M., Ciardi, David R., Gomez, Shamilia C., Horch, Elliott P., Howell, Steve B., Sherry, William H., van Altena, William F.   +6 more
core   +2 more sources

Monitoring spatially heterogeneous dynamics in a drying colloidal thin film [PDF]

, 2010
We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the ...
Berne B.J., Breugem A.J., F. Scheffold, Goodman J.W., Lenke R., Lindner P., P. Zakharov, Skipetrov S.E., Weitz D.A.   +8 more
core   +2 more sources

Interplay between RNA‐protein interactions and RNA structures in gene regulation

FEBS Open Bio, EarlyView.
Methodological advances in mapping transcriptome‐wide RNA‐protein interactions and RNA structures have started to uncover the potential of RNP conformations in gene regulation. Competing RNA–RNA, RNA‐protein and protein–protein interactions shape the compaction and function of RNPs throughout their lifetime and may provide novel therapeutic targets in ...
Jenni Rapakko, Mauro Scaravilli, Minna‐Liisa Änkö   +2 more
wiley   +1 more source

Physical pupil manipulation for speckle reduction in digital holographic microscopy

Heliyon, 2021
The reduction of speckle noise by physically changing the pupil of the imaging system, as first envisioned in optical holography, is experimentally applied to a digital holographic microscope (DHM).
Carlos Buitrago-Duque, Jorge Garcia-Sucerquia   +1 more
doaj   +1 more source

High-contrast Imaging from Space: Speckle Nulling in a Low Aberration Regime

, 2005
High-contrast imaging from space must overcome two major noise sources to successfully detect a terrestrial planet angularly close to its parent star: photon noise from diffracted star light, and speckle noise from star light scattered by instrumentally ...
Krist J., Labeyrie A., Lofdahl M., Pascal J. Borde, Wesley A. Traub   +4 more
core   +1 more source

On-sky speckle nulling demonstration at small angular separation with SCExAO [PDF]

, 2014
This paper presents the first on-sky demonstration of speckle nulling, which was achieved at the Subaru Telescope in the context of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) Project.
Clergeon, Christophe, Currie, Thayne, Guyon, Olivier, Jovanovic, Nemanja, Kudo, Tomoyuki, Martinache, Frantz, McElwain, Michael, Singh, Garima, Tamura, Motohide, Thalmann, Christian   +9 more
core   +5 more sources

Lesion Location and Functional Connections Reveal Cognitive Impairment Networks in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive impairment, fatigue, and depression are common in multiple sclerosis (MS), potentially due to disruption of regional functional connectivity caused by white matter (WM) lesions. We explored whether WM lesions functionally connected to specific brain regions contribute to these MS‐related manifestations.
Alessandro Franceschini, Paolo Preziosa, Paola Valsasina, Damiano Mistri, Monica Margoni, Federica Esposito, Massimo Filippi, Maria A. Rocca   +7 more
wiley   +1 more source