5 papers
A comparative analysis of denoising algorithms for extragalactic imaging surveys
V. Roscani, S. Tozza, M. Castellano +4
We present a comprehensive analysis of the performance of noise-reduction (``denoising'') algorithms to determine whether they provide advantages in source detection on extragalact…
Multidimensional smoothness indicators for first-order Hamilton-Jacobi equations
Maurizio Falcone, Giulio Paolucci, Silvia Tozza
The lack of smoothness is a common feature of weak solutions of nonlinear hyperbolic equations and is a crucial issue in their approximation. This has motivated several efforts to…
On the segmentation of astronomical images via level-set methods
Silvia Tozza, Maurizio Falcone
Astronomical images are of crucial importance for astronomers since they contain a lot of information about celestial bodies that can not be directly accessible. Most of the inform…
A High-Order Scheme for Image Segmentation via a modified Level-Set method
Maurizio Falcone, Giulio Paolucci, Silvia Tozza
In this paper we propose a high-order accurate scheme for image segmentation based on the level-set method. In this approach, the curve evolution is described as the 0-level set of…
Convergence of Adaptive Filtered Schemes for First Order Evolutionary Hamilton-Jacobi Equations
Maurizio Falcone, Giulio Paolucci, Silvia Tozza
We consider a class of "filtered" schemes for first order time dependent Hamilton-Jacobi equations and prove a general convergence result for this class of schemes. A typical filte…