Results 101 to 110 of about 762,837 (162)

Inhomogeneous shearlet coorbit spaces

, 2018
In this paper, we establish inhomogeneous coorbit spaces related to the continuous shearlet transform and the weighted Lebesgue spaces [Formula: see text] for certain weights [Formula: see text].
Lukas Sawatzki, Fabian Feise
core   +1 more source

A Retinal Vessel Detection Approach Based on Shearlet Transform and Indeterminacy Filtering on Fundus Images [PDF]

, 2017
A fundus image is an effective tool for ophthalmologists studying eye diseases. Retinal vessel detection is a significant task in the identification of retinal disease regions.
Guo, Yanhui, Ümit Budak, Florentin Smarandache, Sengur, Abdulkadir, Yanhui Guo, Abdulkadir Sengür, Budak, Umit, Smarandache, Florentin   +7 more
core   +1 more source

3D Discrete Shearlet Transform and Video Denoising

, 2014
This paper introduces a numerical implementation of the 3D shearlet transform, a directional transform which is derived from the theory of shearlets. The shearlet approach belongs to a class of directional multiscale methods emerged during the last 10 ...
Pooran Singh Negi, Demetrio Labate
core  

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

Frontiers 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

A Novel Multi-Focus Image Fusion Method Using Shearlet Transform

, 2010
According to the different frequency areas decomposed by shearlet transform, the selection principles of the lowpass subbands and highpass subbands were discussed respectively.
Jia Zhao, Hui Sun, Li Lü
core   +1 more source

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

Cejing 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, LIU Dongming, TIAN Bin, QIN Minjun   +3 more
doaj   +1 more source

Shearlet-based intensity classification loop filter for video coding

, 2023
The new Versatile Video Coding standard (VVC) exhibits a significantly higher coding efficiency in comparison to its predecessor High Efficiency Video Coding (HEVC).
Detlev Marpe, Wang-Q Lim, Erfurt, Johannes, Lim, Wang-Q, Johannes Erfurt, Jonathan Pfaff, Marpe, Detlev, Schwarz, Heiko, Heiko Schwarz, Thomas Wiegand, Pfaff, Jonathan, Wiegand, Thomas   +11 more
core   +1 more source

Local Spatio-Temporal Representation Using the 3D Shearlet Transform (STSIP)

, 2017
In this work we address the problem of analyzing video sequences and of representing meaningful space-time points of interest by using the 3D shearlet transform.
D. Malafronte, F. Odone, E. De Vito
core   +1 more source

Local spatio-temporal representation using the 3D shearlet transform

, 2017
In this work we address the problem of analyzing video sequences and representing meaningful space-time points of interest. We base our work on the 3D shearlet transform.
Odone, Francesca, De Vito, Ernesto, Ernesto De Vito, Malafronte, Damiano, Francesca Odone, Damiano Malafronte   +5 more
core   +1 more source

Multicomponent microseismic data denoising by 3D shearlet transform

, 2018
The low-magnitude microseismic signals generated by fracture initiation are generally buried in strong background noise, which complicates their interpretation. Thus, noise suppression is a significant step. We have developed an effective multicomponent,
Mirko van der Baan, Chao Zhang
core   +1 more source