Items for "thresholding"

Surrogate functionals and thresholding for inverse interface problems

We propose a new algorithm for computing regularized solutions to inverse problems where the unknown functions is a characteristic function and where the forward operator is linear. Our approach can be seen as an alternative to the level-set method and is based on an efficient computation of minimizers for a Tikhonov functional...

Keywords: inverse problem, interface problem, regularization, thresholding, bounded variation, exact relaxation, surrogate functional, level set method, topological derivative