Results 21 to 30 of about 21,346 (310)

Decay properties of the discrete wavelet transform in n dimensions with independent dilation parameters

open access: yesJournal of Inequalities and Applications, 2016
The purpose of this paper is to study the decay properties of the discrete wavelet transform with n independent dilation parameters for functions f in L 2 ( R n ) $L^{2}({ {\mathbb {R}}}^{n})$ and a relationship with its continuity. The method we used to
Jaime Navarro, Oscar Herrera
doaj   +1 more source

Implementation of Discrete Fourier Transform And Orthogonal Discrete Wavelet Transform In Python

open access: yesJISR on Computing, 2016
This paper presents implementation of Discrete Fourier Transform and Orthogonal Discrete Wavelet Transform in Python computer programming language. The Fourier Transform is a fundamental signal processing tool whereas the Wavelet Transform is a powerful
Tariq Javid Ali   +4 more
doaj   +1 more source

Non-Blind Watermarking Menggunakan Discrete dan Wavelet Transform

open access: yesJurnal Masyarakat Informatika, 2022
Pada zaman sekarang orang mudah untuk mengakses internet sehingga semua orang dapat memperoleh suatu karya seni digital seperti gambar dengan mudah, kemudian seseorang dapat memodifikasi dan menyebarkan kembali karya tersebut tanpa izin atau tanpa ...
Daurat Sinaga, Cahaya Jatmoko
doaj   +1 more source

Continuous and Discrete Wavelet Transforms Associated with Hermite Transform

open access: yesInternational Journal of Analysis and Applications, 2020
In this paper, we accomplished the concept of continuous and discrete Hermite wavelet transforms. We also discussed some basic properties of Hermite wavelet transform.
C. P. Pandey, Pranami Phukan
doaj  

Wavelet-Based Algorithm for Signal Analysis

open access: yesEURASIP Journal on Advances in Signal Processing, 2007
This paper presents a computational algorithm for identifying power frequency variations and integer harmonics by using wavelet-based transform. The continuous wavelet transform (CWT) using the complex Morlet wavelet (CMW) is adopted to detect the ...
L. L. Lai, Norman C. F. Tse
doaj   +2 more sources

The De-Noising of Sonic Echo Test Data through Wavelet Transform Reconstruction

open access: yesShock and Vibration, 1999
This paper presents the results of feasibility study into the application of the wavelet transform signal processing method to sonic based non-destructive testing techniques.
J.N. Watson, P.S. Addison, A. Sibbald
doaj   +1 more source

Bearing fault detection in a 3 phase induction motor using stator current frequency spectral subtraction with various wavelet decomposition techniques

open access: yesAin Shams Engineering Journal, 2018
Induction motors consumes 90% of total power consumed by industries due to large scale utilisation. Even though these motors are rugged in structure, they often face unexpected failure due to long usage without maintenance.
K.C. Deekshit Kompella   +2 more
doaj   +1 more source

A Hybrid Robust Image Watermarking Method Based on DWT-DCT and SIFT for Copyright Protection

open access: yesJournal of Imaging, 2021
In this paper, a robust hybrid watermarking method based on discrete wavelet transform (DWT), discrete cosine transform (DCT), and scale-invariant feature transformation (SIFT) is proposed.
Mohamed Hamidi   +3 more
doaj   +1 more source

On the Discrete Harmonic Wavelet Transform [PDF]

open access: yesMathematical Problems in Engineering, 2008
The discrete harmonic wavelet transform has been reviewed and applied towards given functions. The absolute error of reconstruction of the functions has been computed.
CATTANI, Carlo, KUDREYKO A.
openaire   +3 more sources

A new discrete wavelet transform using variable band filters (Fetal ECG extraction using new discrete wavelet transform)

open access: yesNihon Kikai Gakkai ronbunshu, 2015
In this study, in order to verify the effectiveness of the variable-band-filters discrete wavelet transform (VBF-DWT) and construction method of the variable band filter (VBF), a fetal ECG extraction has been carried out and the main results obtained are
Zhong ZHANG   +4 more
doaj   +1 more source

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