Results 131 to 140 of about 3,713 (248)

Analyse von Shearlet-Coorbit-Räumen

open access: yes, 2018
Coorbit theory provides a framework for the study of approximation theoretic properties of certain elementary building blocks and to analyze properties of functions by considering the decay behavior of their associated wavelet transform. This transform is based on a representation of a group and properties of the group are decisive for the structure of
openaire   +2 more sources

High-Resolution Reflected Wave Extraction and Imaging Enhancement for Array Acoustic Logging

open access: yesCejing jishu
Array acoustic logging reflected wave imaging is an important technology to detect the geological structure and characteristics around the wellbore, especially in the evaluation of fracture-vuggy carbonate rocks and unconventional heterogeneous reservoir.
YUE Wenzheng   +3 more
doaj   +1 more source

Warp-knitted Fabric Defect Segmentation Based on the Shearlet Transform

open access: yes, 2017
The Shearlet transform has been a burgeoning method applied in the area of image processing recently which, differing from the Wavelet transform, has excellent properties in processing singularities for multidimensional signals. Not only is it similar to
Dong Xia   +3 more
core   +1 more source

Optimal sparsity allows reliable system-aware restoration of fluorescence microscopy images. [PDF]

open access: yesSci Adv, 2023
Mandracchia B   +8 more
europepmc   +1 more source

Efficient design of a low redundant discrete shearlet transform

open access: yes, 2009
Recently, there has been a huge interest in multiresolution representations that also perform a multidirectional analysis. The Shearlet transform provides both a multiresolution analysis (such as the wavelet transform), and at the same time an optimally ...
Goossens, Bart   +9 more
core   +1 more source

A Novel Feature Descriptor Based on the Shearlet Transform

open access: yes, 2011
Problems such as image classification, object detection and recog-nition rely on low-level feature descriptors to represent visual in-formation. Several feature extraction methods have been proposed, including the Histograms of Oriented Gradients (HOG ...
Larry S. Davis   +3 more
core   +1 more source

Cross-sectional MRI Data Analysis Based on Shearlet Transformation

open access: yes, 2014
In this thesis, I will explore the various efficient shearlet representations of the Magnetic Resonance Imaging (MRI) data and how they can be further used in classical statistical analysis to shed a light on the early diagnosis of the Alzheimer’s ...
Zhao, Hao
core   +1 more source

GPR data noise attenuation based on the Shearlet transform

open access: yes矿业科学学报, 2017
When using ground penetrating radar(GPR) to detect the underground target distribution, valid signal in receiving data tend to be susceptible to noise and the interference of air-ground waves, which will affect the accuracy of target recognition and ...
Zheng Jing   +4 more
doaj  

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