Results 11 to 20 of about 254,430 (319)

Performance of Damage Identification Based on Directional Wavelet Transforms and Entopic Weights Using Experimental Shearographic Testing Results

open access: yesSensors, 2021
The paper aims to analyze the performance of the damage identification algorithms using the directional wavelet transforms, which reveal higher sensitivity for various orientations of spatial damage together with lower susceptibility to noise.
Andrzej Katunin
doaj   +1 more source

Eye State Identification Based on Discrete Wavelet Transforms

open access: yesApplied Sciences, 2021
We present a prototype to identify eye states from electroencephalography signals captured from one or two channels. The hardware is based on the integration of low-cost components, while the signal processing algorithms combine discrete wavelet ...
Francisco Laport   +4 more
doaj   +1 more source

Filtering of Audio Signals Using Discrete Wavelet Transforms

open access: yesMathematics, 2023
Nonlinear diffusion has been proved to be an indispensable approach for the removal of noise in image processing. In this paper, we employ nonlinear diffusion for the purpose of denoising audio signals in order to have this approach also recognized as a ...
H. K. Nigam, H. M. Srivastava
doaj   +1 more source

Local transformations with a singular wavelet

open access: yesInformatika, 2020
The paper considers a local wavelet transform with a singular basis wavelet. The problem of nonparametric approximation of a function is solved by the use of theĀ  sequence of local wavelet transforms.
V. M. Romanchak
doaj   +1 more source

Coding Implementation By Using Discrete Wavelet Transform [PDF]

open access: yesEngineering and Technology Journal, 2010
Image processing can be considered as an essential part of wide rangecomputer applications. This application deals with image coding and it discussesimage coding schemes, by using transforms to code the image or not.
Matheel Emad AL-Deen AL-Dargazli   +1 more
doaj   +1 more source

The Improvement of Discrete Wavelet Transform

open access: yesMathematics, 2021
Discrete wavelet transform and discrete periodic wavelet transform have been widely used in image compression and data approximation. Due to discontinuity on the boundary of original data, the decay rate of the obtained wavelet coefficients is slow.
Zhihua Zhang
semanticscholar   +1 more source

Comparative analysis of chosen transforms in the context of de-noising harmonic signals [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2015
In the article, comparison of popular transforms used i.a. in denoising harmonical signals was presented. The division of signals submitted to mathematical analysis was shown and chosen transforms such as Short Time Fourier Transform, Wigner-Ville ...
Artur Zacniewski
doaj   +1 more source

Effective lattice structures for separable two-dimensional orthogonal wavelet transforms [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2022
Discrete two-dimensional orthogonal wavelet transforms find applications in many areas of analysis and processing of digital images. In a typical scenario the separability of two-dimensional wavelet transforms is assumed and all calculations follow the ...
Dariusz Puchala
doaj   +1 more source

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