Publications associées à Edge-preserving smoothing

On the effect of image denoising on galaxy shape measurements

Frédéric Courbin, Georges Meylan, Marc Gentile, Guldariya Nurbaeva

Weak gravitational lensing is a very sensitive way of measuring cosmological parameters, including dark energy, and of testing current theories of gravitation. In practice, this requires exquisite measurement of the shapes of billions of galaxies over larg ...

2011

A Second-Order Extension Of Tv Regularization For Image Deblurring

Michaël Unser, Aurélien Bourquard, Stamatios Lefkimmiatis, Zafer Dogan

In this paper, we propose a novel second-order regularizer based on the maximum response of the second-order directional derivative, assuming that the image under consideration belongs to the class of piecewise-linear signals. Compared to total-variation r ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

A Second-Order Extension of TV Regularization for Image Deblurring

Michaël Unser, Aurélien Bourquard, Stamatios Lefkimmiatis

IEEE2011

Image Denoising in Mixed Poisson-Gaussian Noise

Michaël Unser, Thierry Blu, Florian Luisier

We propose a general methodology (PURE-LET) to design and optimize a wide class of transform-domain thresholding algorithms for denoising images corrupted by mixed Poisson-Gaussian noise. We express the denoising process as a linear expansion of thresholds ...

Institute of Electrical and Electronics Engineers2011

Towards oscillation-free implementation of the immersed boundary method with spectral-like methods

Jiannong Fang, Marc Parlange, Chad Higgins, Marc Diebold

It is known that, when the immersed boundary method (IBM) is implemented within spectral-like methods, the Gibbs oscillation seriously deteriorates the calculation of derivatives near the body surface. In this paper, a radial basis function (RBF) based smo ...

Elsevier2011

Fast Space-Variant Elliptical Filtering Using Box Splines

Michaël Unser, Kunal Narayan Chaudhury

The efficient realization of linear space-variant (non-convolution) filters is a challenging computational problem in image processing. In this paper, we demonstrate that it is possible to filter an image with a Gaussian-like elliptic window of varying siz ...

IEEE2010

Graph-based classification of multiple observation sets

Pascal Frossard, Effrosyni Kokiopoulou

We consider the problem of classification of multiple observations of the same object, possibly under different transformations. We view this problem as a special case of semi-supervised learning where all unlabelled examples belong to the same unknown cla ...

Elsevier2010

Audio-based nonlinear video diffusion

Pierre Vandergheynst, Anna Llagostera Casanovas

We propose a novel non-linear video diffusion approach which is able to focus on parts of a video sequence that are relevant for applications in audio-visual analysis. The diffusion process is controlled by a diffusion coefﬁcient based on an estimate of th ...

2010

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Edge-preserving smoothing

Geodesic Active Fields

On the effect of image denoising on galaxy shape measurements

A Second-Order Extension Of Tv Regularization For Image Deblurring

A Second-Order Extension of TV Regularization for Image Deblurring

Image Denoising in Mixed Poisson-Gaussian Noise

Towards oscillation-free implementation of the immersed boundary method with spectral-like methods

Fast Space-Variant Elliptical Filtering Using Box Splines

Tuning-Robust Initialization Methods for Speaker Diarization

Graph-based classification of multiple observation sets

Audio-based nonlinear video diffusion

Graph Chatbot

Chattez avec Graph Search

On the effect of image denoising on galaxy shape measurements

Image Denoising in Mixed Poisson-Gaussian Noise

Geodesic Active Fields

A Second-Order Extension Of Tv Regularization For Image Deblurring

Fast Space-Variant Elliptical Filtering Using Box Splines

A Second-Order Extension of TV Regularization for Image Deblurring

Towards oscillation-free implementation of the immersed boundary method with spectral-like methods

Tuning-Robust Initialization Methods for Speaker Diarization

Graph-based classification of multiple observation sets

Audio-based nonlinear video diffusion