Results 21 to 30 of about 721,188 (387)
Revista Brasileira de Ensino de Física, 2012 A transformada wavelet biortogonal e as bases wavelet são uma poderosa ferramenta para análise de dados multiescala, que tem vastas aplicações na física, matemática, computação e tecnologias. A teoria wavelet é construída, não apenas com o uso de uma nova e brilhante ideia, mas pela sinergia de conceitos e necessidades que já existiam a algum tempo em ...
Domingues, Margarete Oliveira +1 more
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A Practical Guide to Wavelet Analysis.
, 1998 A practical step-by-step guide to wavelet analysis is given, with examples taken from time series of the El Nino–Southern Oscillation (ENSO). The guide includes a comparison to the windowed Fourier transform, the choice of an appropriate wavelet basis ...
C. Torrence, G. Compo
semanticscholar +1 more source
Wavelets on the Interval and Fast Wavelet Transforms
Applied and Computational Harmonic Analysis, 1993 AbstractWe discuss several constructions of orthonormal wavelet bases on the interval, and we introduce a new construction that avoids some of the disadvantages of earlier constructions.
Cohen, Albert +2 more
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Visual Attention-Based Image Watermarking
IEEE Access, 2016 Imperceptibility and robustness are two complementary but fundamental requirements of any watermarking algorithm. Low strength watermarking yields high imperceptibility but exhibits poor robustness.
Deepayan Bhowmik +2 more
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Teknik, 2021 Communication is essential in conveying information from one individual to another. However, not all individuals in the world can communicate verbally. According to WHO, deafness is a hearing loss that affects 466 million people globally, and 34 million ...
Vincentius Abdi Gunawan +1 more
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A Model for Yellow Tea Polyphenols Content Estimation Based on Multi-Feature Fusion
IEEE Access, 2019 Polyphenols are one of the important ingredients determining the quality of tea, which play an important role in affecting tea quality standards and quality control. At present, NIR spectroscopy technology has been widely used in tea quality detection to
Baohua Yang +3 more
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ENO-wavelet transforms for piecewise smooth functions [PDF]
, 2002 We have designed an adaptive essentially nonoscillatory (ENO)-wavelet transform for approximating discontinuous functions without oscillations near the discontinuities. Our approach is to apply the main idea from ENO schemes for numerical shock capturing
Chan, Tony F., Zhou, H. M.
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Ideal spatial adaptation by wavelet shrinkage
, 1994 SUMMARY With ideal spatial adaptation, an oracle furnishes information about how best to adapt a spatially variable estimator, whether piecewise constant, piecewise polynomial, variable knot spline, or variable bandwidth kernel, to the unknown function ...
D. Donoho, I. Johnstone
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Adaptive wavelet thresholding for image denoising and compression
IEEE Transactions on Image Processing, 2000 The first part of this paper proposes an adaptive, data-driven threshold for image denoising via wavelet soft-thresholding. The threshold is derived in a Bayesian framework, and the prior used on the wavelet coefficients is the generalized Gaussian ...
S. G. Chang, Bin Yu, M. Vetterli
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An overview on preseismic anomalies in LF radio signals revealed in Italy by wavelet analysis
Annals of Geophysics, 2008 Since 1996, the electric field strength of the two broadcasting stations MCO (f=216 kHz, southeast France) and CZE (f=270 kHz, Czech Republic) has been sampled every ten minutes by a receiver (AS) located in central Italy.
A. Ermini +3 more
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