Results 111 to 120 of about 1,068,113 (278)

Towards Multi-Directional OCT for Speckle Noise Reduction [PDF]

, 2008
Multi-directional optical coherence tomography (MD-OCT) applies and extends the concept of angular compounding for speckle noise reduction to the area of OCT imaging. OCT images are acquired from a wide range of angles of view. Averaging of the rotated images therefore requires compensation of the parallax which is achieved by simple image registration
Lukas Ramrath, Guillermo Moreno, Heike Mueller, Tim Bonin, Gereon Huettmann, Achim Schweikard   +5 more
openaire   +3 more sources

Microneedles Mediated Delivery of Nanodiamonds for Quantum Sensing of Free Radicals in Skin Tissue

Advanced Materials Technologies, EarlyView.
Fluorescent nanodiamonds are nanoscale sensors capable of monitoring cellular stress responses. However, to function effectively, they must be delivered into cells or tissues. Here, we demonstrate their application in the skin by developing a dissolvable microneedle platform that dissolves after skin insertion, enabling the delivery of nanodiamonds ...
Siyu Fan, Maria Carmona Lobita, Thea Vedelaar, Yue Zhang, Claudia Reyes‐San‐Martin, Tomás Bauleth‐Ramos, Gésinda Geertsema‐Doornbusch, Han Gao, Mohammad‐Ali Shahbazi, Hélder A. Santos, Romana Schirhagl   +10 more
wiley   +1 more source

Penapisan Derau Gaussian, Speckle dan Salt&Pepper Pada Citra Warna

IJCCS (Indonesian Journal of Computing and Cybernetics Systems), 2011
Quality of digital image can decrease becouse some noises. Noise can come from lower quality of image recorder, disturb when transmission data process and weather. Noise filtering can make image better becouse will filtering that noise from the image and
Ika Purwanti Ningrum, Agfianto Eko Putra, Dian Nursantika   +2 more
doaj   +1 more source

Coating‐Free Nanoscratching for Liquid‐Crystal Alignment on PCB‐Compatible Millimeter‐Wave Reflective Unit Cells

Advanced Materials Technologies, EarlyView.
Direct nanoscratching with a 500 nm diamond lapping film creates groove‐guided liquid‐crystal alignment interfaces on PCB‐compatible Cu‐patterned RF substrates within minutes, eliminating polymer coating and high‐temperature baking. The coating‐free process enables optical/molecular alignment validation and voltage‐programmable 28 GHz reflection‐phase ...
Junseok Ma, Ga‐Yeong Park, Geunjung Lee, Hyo‐Won Lee, Jong‐Won Yu, Dong Ki Yoon   +5 more
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

Make It Less Complex: Autoencoder for Speckle Noise Removal-Application to Breast and Lung Ultrasound. [PDF]

J Imaging, 2023
Oliveira-Saraiva D, Mendes J, Leote J, Gonzalez FA, Garcia N, Ferreira HA, Matela N.   +6 more
europepmc   +1 more source

Is Speckle Noise More Challenging to Mitigate Than Additive Noise?

IEEE Transactions on Information Theory
We study the problem of estimating a function in the presence of both speckle and additive noises, commonly referred to as the de-speckling problem. Although additive noise has been thoroughly explored in nonparametric estimation, speckle noise, prevalent in applications such as synthetic aperture radar, ultrasound imaging, and digital holography, has ...
Reihaneh Malekian, Hao Xing, Arian Maleki   +2 more
openaire   +3 more sources

In Situ Two‐Dimensional Residual Stress Characterization of Thin Films

Advanced Materials Technologies, EarlyView.
An integrated in situ curvature metrology platform combining speckle‐based curvature optical metrology (SCOM) with multi‐beam optical sensors (MOS) enables spatially resolved two‐dimensional curvature mapping of thick sputtered coatings. The SCOM technique provides excellent agreement with MOS while providing an extended measurable curvature range ...
Wai Jue Tan, Wadwan Singhapong, Arindam Majhi, Chris Bowen, Alexander J.G. Lunt, Hongchang Wang, Kawal Sawhney   +6 more
wiley   +1 more source

Robust SAR Image Despeckling by Deep Learning From Near-Real Datasets

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The inherent speckle in synthetic aperture radar (SAR) images significantly affects their potential usefulness, and its effective suppression is a challenging and nontrivial task.
Jianjun Guan, Rui Liu, Xin Tian, Xinming Tang, Song Li   +4 more
doaj   +1 more source

FETAL ULTRASOUND IMAGE DENOISING USING CURVELET TRANSFORM [PDF]

ICTACT Journal on Image and Video Processing, 2015
The random speckle noise in the acquired fetal ultrasound images is caused by the interference of reflected ultrasound wave fronts. The presence of speckle noise will degrade the quality of the image and even hide image details, which in turn affect the ...
J. Nithya, M. Madheswaran
doaj