Results 121 to 130 of about 762,837 (162)

Comparing Undecimated Wavelet, Nonsubsampled Contourlet and Shearlet for Sar Images Despeckling

Majlesi Journal of Electrical Engineering
Synthetic Aperture Radar (SAR) images suffer of multiplicative speckle noise, which damages the radiometric resolution of SAR images and makes the data interpretation difficult.
Saeed Jafari, Sedigheh Ghofrani, M. Sheikhan   +2 more
doaj  

3D OCT image compression using shearlet transform

, 2019
International audience3D OCT image compression using shearlet ...
Bartoli, A, Tamadazte, Brahim, Haydar, Bassel, Andreff, Nicolas   +3 more
core   +1 more source

A novel MRI PET image fusion using shearlet transform and pulse coded neural network

Scientific Reports
Image fusion involves combining details from two or more different imaging techniques, say MRI and PET images and provides a better image for diagnosis and treatment. Despite the fact standard spatial domain methods are being used successfully, including
Vella Satyanarayana, P. Mohanaiah
doaj   +1 more source

A New Shearlet Framework for Image Denoising

Iranian Journal of Electrical and Electronic Engineering, 2016
Traditional noise removal methods like Non-Local Means create spurious boundaries inside regular zones. Visushrink removes too many coefficients and yields recovered images that are overly smoothed.
E. Ehsaeyan
doaj  

Improved Radon Based Imaging using the Shearlet Transform

, 2014
Many imaging modalities, such as Synthetic Aperture Radar (SAR), can be described mathematically as collecting data in a Radon transform domain. The process of inverting the Radon transform to form an image can be unstable when the data collected contain
Demetrio Labate C, Flavia Colonna B, Glenn R. Easley A   +2 more
core  

Defect Detection in Magnetic Tile Images Based on Non-subsampled Shearlet Transform

工程科学与技术, 2017
:A novel surface defect detection method based on non-subsampled shearlet transform (NSST) was proposed for detecting defects with random noise,low contrast,uneven background and regularly distributed grinding texture in magnetic tile surface images.The ...
YANG Chengli, yin ming, XIANG Zhaowei, Yin Guofu, FAN Kui   +4 more
doaj  

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Nonseparable Shearlet Transform

IEEE Transactions on Image Processing, 2013
Over the past few years, various representation systems which sparsely approximate functions governed by anisotropic features, such as edges in images, have been proposed. Alongside the theoretical development of these systems, algorithmic realizations of the associated transforms are provided.
Wang-Q Lim
exaly   +3 more sources

The Discrete Shearlet Transform: A New Directional Transform and Compactly Supported Shearlet Frames

IEEE Transactions on Image Processing, 2010
It is now widely acknowledged that analyzing the intrinsic geometrical features of the underlying image is essential in many applications including image processing. In order to achieve this, several directional image representation schemes have been proposed.
Wang-Q Lim
exaly   +3 more sources

Continuity properties of the shearlet transform and the shearlet synthesis operator on the Lizorkin type spaces

Mathematische Nachrichten, 2022
AbstractWe develop a distributional framework for the shearlet transform and the shearlet synthesis operator , where is the Lizorkin test function space and is the space of highly localized test functions on the standard shearlet group . These spaces and their duals are called Lizorkin type spaces of test functions and distributions.
Francesca Bartolucci, Stevan Pilipović, Nenad Teofanov   +2 more
exaly   +5 more sources

Clifford Valued Shearlet Transform

Advances in Applied Clifford Algebras, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sharma, Jyoti, Singh, Shivam Kumar
openaire   +2 more sources