Search Results for author: Valentina De Simone

Found 3 papers, 1 papers with code

Cartoon-texture evolution for two-region image segmentation

no code implementations7 Mar 2022 Laura Antonelli, Valentina De Simone, Marco Viola

Two-region image segmentation is the process of dividing an image into two regions of interest, i. e., the foreground and the background.

Image Segmentation Segmentation +2

Sparse Approximations with Interior Point Methods

no code implementations26 Feb 2021 Valentina De Simone, Daniela di Serafino, Jacek Gondzio, Spyridon Pougkakiotis, Marco Viola

Large-scale optimization problems that seek sparse solutions have become ubiquitous.

Portfolio Optimization Optimization and Control Numerical Analysis Numerical Analysis 65K05, 90C51, 90C25, 65F10, 65F08, 90C90

A subspace-accelerated split Bregman method for sparse data recovery with joint l1-type regularizers

1 code implementation14 Dec 2019 Valentina De Simone, Daniela di Serafino, Marco Viola

We propose a subspace-accelerated Bregman method for the linearly constrained minimization of functions of the form $f(\mathbf{u})+\tau_1 \|\mathbf{u}\|_1 + \tau_2 \|D\,\mathbf{u}\|_1$, where $f$ is a smooth convex function and $D$ represents a linear operator, e. g. a finite difference operator, as in anisotropic Total Variation and fused-lasso regularizations.

Optimization and Control Numerical Analysis Numerical Analysis 65K05, 90C25 G.1.6

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