63 citations · 69 across the 8 of their papers we have counts for
3 papers · 1 filter
A Primal-Dual Homotopy Algorithm for -Minimization with -Constraints
Christoph Brauer, Dirk A. Lorenz, Andreas M. Tillmann
In this paper we propose a primal-dual homotopy method for -minimization problems with infinity norm constraints in the context of sparse reconstruction. The natural homoto…
Linear convergence of the Randomized Sparse Kaczmarz Method
Frank Schöpfer, Dirk A. Lorenz
The randomized version of the Kaczmarz method for the solution of linear systems is known to converge linearly in expectation. In this work we extend this result and show that the…
Testable uniqueness conditions for empirical assessment of undersampling levels in total variation-regularized x-ray CT
Jakob S. Jørgensen, Christian Kruschel, Dirk A. Lorenz
We study recoverability in fan-beam computed tomography (CT) with sparsity and total variation priors: how many underdetermined linear measurements suffice for recovering images of…