6 citations · 6 across the 3 of their papers we have counts for
3 papers
Fast PET Reconstruction with Variance Reduction and Prior-Aware Preconditioning
Matthias J. Ehrhardt, Zeljko Kereta, Georg Schramm
We investigate subset-based optimization methods for positron emission tomography (PET) image reconstruction incorporating a regularizing prior. PET reconstruction methods that use…
Practical Acceleration of the Condat-Vũ Algorithm
Derek Driggs, Matthias J. Ehrhardt, Carola-Bibiane Schönlieb +1
The Condat-Vũ algorithm is a widely used primal-dual method for optimizing composite objectives of three functions. Several algorithms for optimizing composite objectives of two fu…
Gradient descent in a generalised Bregman distance framework
Martin Benning, Marta M. Betcke, Matthias J. Ehrhardt +1
We discuss a special form of gradient descent that in the literature has become known as the so-called linearised Bregman iteration. The idea is to replace the classical (squared)…