3 papers
math.NA2024
Denoising Sphere-Valued Data by Relaxed Total Variation Regularization
Robert Beinert, Jonas Bresch
Circle- and sphere-valued data play a significant role in inverse problems like magnetic resonance phase imaging and radar interferometry, in the analysis of directional informatio…
math.NA2024
Tangential Fixpoint Iterations for Gromov-Wasserstein Barycenters
Florian Beier, Robert Beinert
The Gromov-Wasserstein (GW) transport problem is a relaxation of classic optimal transport, which seeks a transport between two measures while preserving their internal geometry. D…
cs.IT2023
Prony-Based Super-Resolution Phase Retrieval of Sparse, Multivariate Signals
Robert Beinert, Saghar Rezaei
Phase retrieval consists in the recovery of an unknown signal from phaseless measurements of its usually complex-valued Fourier transform. Without further assumptions, this problem…