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Complex Wavelets for Shift Invariant Analysis and Filtering of Signals
This paper describes a form of discrete wavelet transform, which generates complex coefficients by using a dual tree of wavelet filters to obtain their real and imaginary parts. This introducesExpand
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Complex wavelets and shift invariance
Recently we have developed a new form of discrete wavelet transform, which generates complex coefficients by using a dual tree of wavelet filters to obtain their real and imaginary parts. ThisExpand
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Wavelet restoration of medical pulse-echo ultrasound images in an EM framework
TLDR
We propose an expectation-maximization (EM) algorithm that simultaneously solves the image restoration problem and the speckle removal problem by iteratively alternating between Wiener filtering (to solve for the tissue reflectivity) and wavelet-based denoising to estimate the echogenicity. Expand
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Modeling ultrasound imaging as a linear, shift-variant system
Wo solve the equation that governs acoustic wave propagation in an inhomogeneous medium to show that the radio-frequency (RF) ultrasound signal can he expressed as the result of filtering theExpand
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Multi-Scale Kernel Methods for Classification
TLDR
We propose the enhancement of support vector machines for classification by the use of multi-scale kernel structures (based on wavelet philosophy) which can be linearly combined in a spatially varying way. Expand
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Distortion measure for blocking artifacts in images based on human visual sensitivity
TLDR
A visual model which gives a distortion measure for Blocking Artifacts in images which quantifies the visibility of blocking error in the reproduced image. Expand
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Estimation of speed of sound in dual-layered media using medical ultrasound image deconvolution.
TLDR
The speed of sound in soft tissues is usually assumed to be 1540 m/s in medical pulse-echo ultrasound imaging systems. Expand
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Flame Interactions in Turbulent Premixed Twin V-Flames
Multiple flame–flame interactions in premixed combustion are investigated using direct numerical simulations of twin turbulent V-flames for a range of turbulence intensities and length scales.Expand
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Estimation of average speed of sound using deconvolution of medical ultrasound data.
TLDR
In diagnostic ultrasound imaging the speed of sound is assumed to be 1540 m/s in soft tissues. Expand
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Watermark detection based on the properties of error control codes
TLDR
It is shown that it is not necessary to use a reference watermark for detection purposes if the watermark payload is encoded with an error control code. Expand
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