Publications related to A sparse reconstruction framework for Fourier-based plane wave imaging

Structural and acoustic behavior of chiral truss-core beams

This paper analyzes the structural and acoustic behavior of sandwich beams with a chiral truss-core. This particular core configuration is considered to exploit some of the unique properties of the chiral geometry and to explore their potential benefits in ...

American Society of Mechanical Engineers2006

A truncated Fourier/finite element discretization of the Stokes equations in an axisymmetric domain

Simone Deparis

We consider the Stokes problem in a three-dimensional axisymmetric domain and, by writing the Fourier expansion of its solution with respect to the angular variable, we observe that each Fourier coefficient satisfies a system of equations on the meridian d ...

2006

Polyharmonic Smoothing Splines for Multi-Dimensional Signals with 1 ⁄ $ ||ω|| ^{ \tau } $ -Like Spectra

Michaël Unser, Dimitri Nestor Alice Van De Ville

Motivated by the fractal-like behavior of natural images, we propose a new smoothing technique that uses a regularization functional which is a fractional iterate of the Laplacian. This type of functional has previously been introduced by Duchon in the con ...

IEEE2004

Guest Editorial: Wavelets in Medical Imaging

Michaël Unser

I. Introduction Wavelets are the result of collective efforts that recognized common threads between ideas and concepts that had been independently developed and investigated by distinct research communities. They provide a unifying framework for decompos ...

2003

Hybrid video coding using bi-dimensional matching pursuit

Pierre Vandergheynst, Lorenzo Granai, Lorenzo Peotta, Emilio Maggio

In this report we propose a new coding scheme based on the Matching Pursuit algorithm and exploiting some of the new features introduced by H.264 for motion estimation. Main points of this work are the design of a redundant dictionary suitable for coding d ...

2003

Non-Linear Fresnelet Approximation for Interference Term Suppression in Digital Holography

Michaël Unser, Thierry Blu

We present a zero-order and twin image elimination algorithm for digital Fresnel holograms that were acquired in an off-axis geometry. These interference terms arise when the digital hologram is reconstructed and corrupt the result. Our algorithm is based ...

SPIE2003

Moire patterns between aperiodic layers: quantitative analysis and synthesis

Isaac Amidror

Moire effects that occur in the superposition of aperiodic layers such as random dot screens are known as Glass patterns. Unlike classical moiré effects between periodic layers, which are periodically repeated throughout the superposition, a Glass p ...

Opt. Soc. America2003

Multidimensional, Multistage Wavelet Footprints: A New Tool for Image Segmentation and Feature Extraction in Medical Ultrasound

Michaël Unser, Michael Sühling, Muthuvel Arigovindan

We present a new wavelet-based strategy for autonomous feature extraction and segmentation of cardiac structures in dynamic ultrasound images. Image sequences subjected to a multidimensional (2D plus time) wavelet transform yield a large number of individu ...

SPIE2003

Open loop and closed loop spectral frequency active filtering

Alfred Rufer

This paper proposes two frequency based methods for parallel active filtering of current harmonics in utility grids. Active filter (AF) reference prediction and AF current control are the two key-points to obtain high performances. This paper deals with th ...

2002

Sampling of Periodic Signals: A Quantitative Error Analysis

Michaël Unser, Thierry Blu, Mathews Jacob

We present an exact expression for the

L _{ 2 }

error that occurs when one approximates a periodic signal in a basis of shifted and scaled versions of a generating function. This formulation is applicable to a wide variety of linear approximation schem ...

IEEE2002

A sparse reconstruction framework for Fourier-based plane wave imaging

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Structural and acoustic behavior of chiral truss-core beams

A truncated Fourier/finite element discretization of the Stokes equations in an axisymmetric domain

Polyharmonic Smoothing Splines for Multi-Dimensional Signals with 1 ⁄ $ ||ω|| ^{ \tau } $ -Like Spectra

Guest Editorial: Wavelets in Medical Imaging

Hybrid video coding using bi-dimensional matching pursuit

Non-Linear Fresnelet Approximation for Interference Term Suppression in Digital Holography

Moire patterns between aperiodic layers: quantitative analysis and synthesis

Multidimensional, Multistage Wavelet Footprints: A New Tool for Image Segmentation and Feature Extraction in Medical Ultrasound

Open loop and closed loop spectral frequency active filtering

Sampling of Periodic Signals: A Quantitative Error Analysis

Hybrid video coding using bi-dimensional matching pursuit

A truncated Fourier/finite element discretization of the Stokes equations in an axisymmetric domain

Guest Editorial: Wavelets in Medical Imaging

Moire patterns between aperiodic layers: quantitative analysis and synthesis

Open loop and closed loop spectral frequency active filtering

Non-Linear Fresnelet Approximation for Interference Term Suppression in Digital Holography

Polyharmonic Smoothing Splines for Multi-Dimensional Signals with 1 ⁄ $ ||ω|| ^{ \tau } $ -Like Spectra

Structural and acoustic behavior of chiral truss-core beams

Multidimensional, Multistage Wavelet Footprints: A New Tool for Image Segmentation and Feature Extraction in Medical Ultrasound

Sampling of Periodic Signals: A Quantitative Error Analysis