4 papers · 1 filter
Towards Digital Halftoning on Closed Manifolds--An Error Diffusion Scheme for the Torus based on Sigma-Delta Quantization along the Rank-one Lattice
Felix Krahmer, Alessandro Lupoli
Digital halftoning aims to represent continuous-tone images by binary patterns while preserving their visually relevant low-frequency content. Among the many available approaches,…
On Trajectory-Based Stability Analysis for -bit Sigma-Delta Quantization and its Application to the Second-Order Case
Rohan Joy, Felix Krahmer, Alessandro Lupoli
A state-of-the-art strategy for digitally representing a bandlimited signal is quantization. quantization schemes choose a bit sequence representing the sampl…
Phasebook: A Survey of Selected Open Problems in Phase Retrieval
Marc Allain, Selin Aslan, Wim Coene +13
Phase retrieval is an inverse problem that, on one hand, is crucial in many applications across imaging and physics, and, on the other hand, leads to deep research questions in the…
Spectral method for low-dose Poisson and Bernoulli phase retrieval
Sjoerd Dirksen, Felix Krahmer, Patricia Römer +1
We consider the problem of phaseless reconstruction from measurements with Poisson or Bernoulli distributed noise. This is of particular interest in biological imaging experiments…