Results 51 to 60 of about 52,858 (287)

Speckle Reduction with Trained Nonlinear Diffusion Filtering [PDF]

Journal of Mathematical Imaging and Vision, 2016
to appear in Journal of Mathematical Imaging and Vision.
Feng, Wensen, Chen, Yunjin
openaire   +3 more sources

Intrinsic speckle noise in in-line particle holography due to poly-disperse and continuous particle sizes [PDF]

, 2000
In-line particle holography is subject to image deterioration due to intrinsic speckle noise. The resulting reduction in the signal to noise ratio (SNR) of the replayed image can become critical for applications such as holographic particle velocimetry ...
Edwards, PJ, Hobson, PR, Rodgers, GJ
core  

Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter

, 2017
We present a new matched filter algorithm for direct detection of point sources in the immediate vicinity of bright stars. The stellar Point Spread Function (PSF) is first subtracted using a Karhunen-Lo\'eve Image Processing (KLIP) algorithm with Angular
Arriaga, Pauline, Bailey, Vanessa P., Barman, Travis, Bulger, Joanna, Chilcote, Jeffrey, Cotten, Tara, Czekala, Ian, De Rosa, Robert J., Doyon, Rene, Duchêne, Gaspard, Fitzgerald, Michael P., Follette, Katherine B., Gerard, Benjamin L., Goodsell, Stephen J., Graham, James R., Greenbaum, Alexandra Z., Hibon, Pascale, Hung, Li-Wei, Ingraham, Patrick, Kalas, Paul, Konopacky, Quinn, Larkin, James E., Macintosh, Bruce, Maire, Jérôme, Marchis, Franck, Marley, Mark S., Marois, Christian, Metchev, Stanimir, Millar-Blanchaer, Maxwell A., Morzinski, Katie M., Nielsen, Eric L., Oppenheimer, Rebecca, Palmer, David, Patience, Jennifer, Perrin, Marshall, Poyneer, Lisa, Pueyo, Laurent, Rajan, Abhijith, Rameau, Julien, Rantakyrö, Fredrik T., Ruffio, Jean-Baptiste, Savransky, Dmitry, Schneider, Adam C., Sivaramakrishnan, Anand, Song, Inseok, Soummer, Remi, Thomas, Sandrine, Wallace, J. Kent, Wang, Jason J., Ward-Duong, Kimberly, Wiktorowicz, Sloane, Wolff, Schuyler   +51 more
core   +3 more sources

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Speckle spot detection in ultrasound images: Application to speckle reduction and speckle tracking [PDF]

2014 IEEE International Ultrasonics Symposium, 2014
This paper investigates the speckle spot detection task in ultrasound images. Speckle spots are described by structural criteria: dimensions, shape, and topology. We propose to represent the image using a morphological inclusion tree, from which speckle spots are detected using their structural appearance. This makes the method independent of contrast,
Nicolas Widynski, Thierry Geraud, Damien Garcia   +2 more
openaire   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Laser Spatial Coherence Suppression With Refractive Optical Elements Toward the Improvement of Speckle Reduction by Light Pipes

IEEE Access, 2019
We study laser speckle reduction by light pipes, and we propose a new method to improve its efficiency. Proof-of-concept refractive optical elements (ROEs) with a staircase-like structure are introduced before a holographic diffuser to split a laser beam
Zhaomin Tong, Changyuan Sun, Yifei Ma, Mei Wang, Suotang Jia, Xuyuan Chen   +5 more
doaj   +1 more source

High-Contrast 3.8 Micron Imaging Of The Brown Dwarf/Planet-Mass Companion to GJ 758 [PDF]

, 2010
We present L' band (3.8 $\mu m$) MMT/Clio high-contrast imaging data for the nearby star GJ 758, which was recently reported by Thalmann et al. (2009) to have one -- possibly two-- faint comoving companions (GJ 758B and ``C", respectively).
Bailey, Vanessa, Currie, Thayne, Fabrycky, Daniel, Hinz, Phil, Murray-Clay, Ruth, Rodigas, Timothy   +5 more
core   +3 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Reduction of speckle noise in laser energy distribution on the target by means of modified Fourier hologram and incoherent averaging technique

Semiconductor Physics, Quantum Electronics & Optoelectronics, 2018
Presented in this paper is the technique of formation of required laser intensity distribution on the target with a reduced speckle noise. The method is based on the use of modified Fourier hologram adapted to controlled phase modulators.
A.G. Derzhypolskyi, O.V. Gnatovskyi, L.A. Derzhypolska   +2 more
doaj   +1 more source