3 papers
math.NA2023
Blind Ptychography via Blind Deconvolution
Mark Philip Roach
Ptychography involves a sample being illuminated by a coherent, localised probe of illumination. When the probe interacts with the sample, the light is diffracted and a diffraction…
math.NA2022
On Outer Bi-Lipschitz Extensions of Linear Johnson-Lindenstrauss Embeddings of Low-Dimensional Submanifolds of
Mark A. Iwen, Mark Philip Roach
Let be a compact -dimensional submanifold of with reach and volume . Fix . In this paper we prove that a nonlinear f…
math.NA2021
Toward Fast and Provably Accurate Near-field Ptychographic Phase Retrieval
Mark Iwen, Michael Perlmutter, Mark Philip Roach
Ptychography is an imaging technique which involves a sample being illuminated by a coherent, localized probe of illumination. When the probe interacts with the sample, the light i…