Publications related to Tilings of the time-frequency plane: construction of arbitrary orthogonal bases and fast tiling algorithms

MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

This paper addresses the general problem of blind echo retrieval, i.e., given M sensors measuring in the discrete-time domain M mixtures of K delayed and attenuated copies of an unknown source signal, can the echo locations and weights be recovered? This p ...

2018

MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

Rémi Gribonval, Helena Peic Tukuljac

This paper addresses the general problem of blind echo retrieval, i.e., given M sensors measuring in the discrete-time domain M mixtures of K delayed and attenuated copies of an unknown source signal, can the echo locations and weights be recovered? This p ...

NEURAL INFORMATION PROCESSING SYSTEMS (NIPS)2018

Sampling Continuous-time Sparse Signals: A Frequency-domain Perspective

Martin Vetterli, Benjamin Bejar Haro

We address the problem of sampling and reconstruction of sparse signals with finite rate of innovation. We derive general conditions under which perfect reconstruction is possible for sampling kernels satisfying Strang-Fix conditions. Previous results on t ...

2018

An Adaptive Sublinear-Time Block Sparse Fourier Transform

Volkan Cevher, Mikhail Kapralov, Jonathan Mark Scarlett, Amir Zandieh

The problem of approximately computing the

k

dominant Fourier coefficients of a vector

X

quickly, and using few samples in time domain, is known as the Sparse Fourier Transform (sparse FFT) problem. A long line of work on the sparse FFT has resulted in ...

2017

Local Geometric Transformations in Image Analysis

Zsuzsanna Püspöki

The characterization of images by geometric features facilitates the precise analysis of the structures found in biological micrographs such as cells, proteins, or tissues. In this thesis, we study image representations that are adapted to local geometric ...

EPFL2016

On the Continuous Steering of the Scale of Tight Wavelet Frames

Michaël Unser, Daniel Sage, Zsuzsanna Püspöki, John Paul Ward

In analogy with steerable wavelets, we present a general construction of adaptable tight wavelet frames, with an emphasis on scaling operations. In particular, the derived wavelets can be "dilated" by a procedure comparable to the operation of steering ste ...

SIAM2016

Real-time multi-signal frequency tracking with a bank of notch filters to estimate the respiratory rate from the ECG

Jean-Marc Vesin, Leila Mirmohamadsadeghi

Measuring the instantaneous frequency of a signal rapidly and accurately is essential in many applications. However, the instantaneous frequency by definition is a parameter difficult to determine. Fourier-based methods introduce estimation delays as compu ...

Institute of Physics2016

Transforms and Operators for Directional Bioimage Analysis: A Survey

Michaël Unser, Daniel Sage, Zsuzsanna Püspöki, Martin Kurt Storath

We give a methodology-oriented perspective on directional image analysis and rotation-invariant processing. We review the state of the art in the field and make connections with recent mathematical developments in functional analysis and wavelet theory. We ...

Springer International Publishing2016

Flexibeam: Analytic Spatial Filtering By Beamforming

Paul Hurley, Matthieu Martin Jean-André Simeoni

We propose a new, general, method for spatial filtering by beam-forming. The desired filter, specified analytically on an n-dimensional sphere, is extended to n+1-dimensional Euclidean space. A continuous beamforming function is then obtained by the n+1-di ...

Ieee2016

Optimal Window and Lattice in Gabor Transform. Application to Audio Analysis.

Benjamin Ricaud

This article deals with the use of optimal lattice and optimal window in Discrete Gabor Transform computation. In the case of a generalized Gaussian window, extending earlier contributions, we introduce an additional local window adaptation technique for n ...

Ieee2016

Tilings of the time-frequency plane: construction of arbitrary orthogonal bases and fast tiling algorithms

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MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

Sampling Continuous-time Sparse Signals: A Frequency-domain Perspective

An Adaptive Sublinear-Time Block Sparse Fourier Transform

Local Geometric Transformations in Image Analysis

On the Continuous Steering of the Scale of Tight Wavelet Frames

Real-time multi-signal frequency tracking with a bank of notch filters to estimate the respiratory rate from the ECG

Transforms and Operators for Directional Bioimage Analysis: A Survey

Flexibeam: Analytic Spatial Filtering By Beamforming

Optimal Window and Lattice in Gabor Transform. Application to Audio Analysis.

Local Geometric Transformations in Image Analysis

Sampling Continuous-time Sparse Signals: A Frequency-domain Perspective

MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

Flexibeam: Analytic Spatial Filtering By Beamforming

MULAN: A Blind and Off-Grid Method for Multichannel Echo Retrieval

Real-time multi-signal frequency tracking with a bank of notch filters to estimate the respiratory rate from the ECG

On the Continuous Steering of the Scale of Tight Wavelet Frames

Optimal Window and Lattice in Gabor Transform. Application to Audio Analysis.

An Adaptive Sublinear-Time Block Sparse Fourier Transform

Transforms and Operators for Directional Bioimage Analysis: A Survey