no code implementations • 13 Jul 2022 • Arthur Marmin, José Henrique de Morais Goulart, Cédric Févotte
It is well known that the norm of the other factor (the dictionary matrix) needs to be controlled in order to avoid an ill-posed formulation.
no code implementations • 29 Jun 2021 • Arthur Marmin, José Henrique de Morais Goulart, Cédric Févotte
Our new updates are derived from a joint majorization-minimization (MM) scheme, in which an auxiliary function (a tight upper bound of the objective function) is built for the two factors jointly and minimized at each iteration.
no code implementations • 29 Oct 2020 • Arthur Marmin, Marc Castella, Jean-Christophe Pesquet, Laurent Duval
We propose a method to reconstruct sparse signals degraded by a nonlinear distortion and acquired at a limited sampling rate.
