Concept
Dérivée covariante
Publications associées (49)
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 Usa2011Regularized Interpolation for Noisy Images
Michaël Unser, Philippe Thévenaz, Sathish Ramani
Interpolation is the means by which a continuously defined model is fit to discrete data samples. When the data samples are exempt of noise, it seems desirable to build the model by fitting them exactly. In medical imaging, where quality is of paramount im ...
IEEE2010Local and Global Eulerian Gyrokinetic Simulations of Microturbulence in Realistic Geometry with Applications to the TCV Tokamak
In magnetically confined fusion devices, the energy and particle transport is significantly larger than expected from purely collisional processes. This degraded confinement mostly results from small-scale turbulence and prevents from reaching self-sustain ...
EPFL2010Self-Similar Random Vector Fields and Their Wavelet Analysis
Michaël Unser, Pouya Dehghani Tafti
This paper is concerned with the mathematical characterization and wavelet analysis of self-similar random vector fields. The study consists of two main parts: the construction of random vector models on the basis of their invariance under coordinate trans ...
SPIE2009