no code implementations • 7 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.
no code implementations • 26 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
1 code implementation • 14 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