Results 11 to 20 of about 133,909 (293)
Singularities in Speckled Speckle [PDF]
Optics Letters, 2007 Speckle patterns produced by random optical fields with two (or more) widely different correlation lengths exhibit speckle spots that are themselves highly speckled.
Baranova +24 more
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Speckle Filtering Impact on Land Cover Mapping Using the Combination of Sentinel-1 and Sentinel-2 Images (Case study: Bandar Mahshahr) [PDF]
Nīvār, 2022 Land use and land cover maps are essentially needed for socio-economic development and environment protection. Accurate and up to date maps play an important role in urban planning.
Mohammad Hossein Hajarian +2 more
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Review of speckle on high resolution synthetic aperture radar imagery
Nantong Daxue xuebao. Ziran kexue ban, 2022 Understanding the speckle mechanism and modelling the physical representation is the theoretical basis for understanding synthetic aperture radar(SAR) images.
XU Zhihuo; LI Hengchao
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Dynamic properties of speckled speckles [PDF]
SPIE Proceedings, 2010 We consider the dynamical properties of speckles observed through a second static diffuser arising from a linear or angularly displaced first diffuser. Analytical expressions are obtained for general situations where both the space between the displaced and the static diffuser and the space between the static diffuser and the plane of observation ...
G. Hanson, Steen +2 more
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Singularities in speckled speckle: screening [PDF]
Journal of the Optical Society of America A, 2008 We study screening of optical singularities in random optical fields with two widely different length scales. We call the speckle patterns generated by such fields speckled speckle, because the major speckle spots in the pattern are themselves highly speckled.
Kessler, David A., Freund, Isaac
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Physical Review E, 2010 We have measured the local and global statistics of singularity velocity, v, and have related these through the spatial correlation function of v. The distribution of v is a mixture of a mesoscopic distribution of global change in the speckle pattern and the distribution for v for Gaussian random fields.
Zhang, Sheng +2 more
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Optics Express, 2020 Speckle is the spatial fluctuation of irradiance seen when coherent light is reflected from a rough surface. It is due to light reflected from the surface’s many nooks and crannies accumulating vastly discrepant time delays, spanning much more than an optical period, en route to an observation point.
Justin Dove, Jeffrey H. Shapiro
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Cardiology Journal, 2020 BACKGROUND: Circulating troponin levels are both stable and higher in patients with end-stage renal disease, even in the absence of acute coronary syndrome. These patients commonly have underlying cardiac problems that frequently cause troponin elevation.
Serkan Ünlü +8 more
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Interferometric Quantification of the Impact of Relative Humidity Variations on Cultural Heritage
Heritage, 2022 It has been shown that Relative Humidity (RH) provokes dimensional displacement detectable directly from surfaces using holographic interferometry.
Vivi Tornari
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Cold Spring Harbor Perspectives in Biology, 2010 Nuclear speckles, also known as interchromatin granule clusters, are nuclear domains enriched in pre-mRNA splicing factors, located in the interchromatin regions of the nucleoplasm of mammalian cells. When observed by immunofluorescence microscopy, they usually appear as 20-50 irregularly shaped structures that vary in size.
Spector, David L., Lamond, Angus I.
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