Results 131 to 140 of about 6,475 (267)

Suppressing seismic random noise based on non-subsampled shearlet transform and improved FFDNet

open access: yesFrontiers in Earth Science
Traditional denoising methods often lose details or edges, such as Gaussian filtering. Shearlet transform is a multi-scale geometric analysis tool which has the advantages of multi-resolution and multi-directivity.
Hua Fan, Yang Zhang, Wenxu Wang, Tao Li
doaj   +1 more source

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

SAR image despeckling: based on non-local means with non-subsample Shearlet and directional windows [PDF]

open access: gold, 2012
Xiaohua Zhang   +4 more
openalex   +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  

Multimodal medical image fusion in NSST domain with structural and spectral features enhancement. [PDF]

open access: yesHeliyon, 2023
Khan SU   +5 more
europepmc   +1 more source

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