[HTML][HTML] Influence of loss function and electron dose on ptychography of 2D materials using the Wirtinger flow

ML Leidl, B Diederichs, C Sachse, K Müller-Caspary - Micron, 2024 - Elsevier
Iterative phase retrieval is based on minimising a loss function as a measure of the
consistency of an initial guess and underlying experimental data. Under ideal experimental …

Background Denoising for Ptychography via Wigner Distribution Deconvolution

O Melnyk, P Römer - arXiv preprint arXiv:2402.15353, 2024 - arxiv.org
Ptychography is a computational imaging technique that aims to reconstruct the object of
interest from a set of diffraction patterns. Each of these is obtained by a localized illumination …

Background removal for Ptychography via Wigner distribution deconvolution

O Melnyk, P Römer - SIAM Journal on Imaging Sciences, 2024 - SIAM
Ptychography is a computational imaging technique that aims to reconstruct the object of
interest from a set of diffraction patterns. Each of these is obtained by a localized illumination …

A stochastic ADMM algorithm for large-scale ptychography with weighted difference of anisotropic and isotropic total variation

K Bui, ZW Di - Inverse Problems, 2024 - iopscience.iop.org
Ptychography, a prevalent imaging technique in fields such as biology and optics, poses
substantial challenges in its reconstruction process, characterized by nonconvexity and …

Retrieval of phase information from low-dose electron microscopy experiments: are we at the limit yet?

FV Ibáñez, J Verbeeck - arXiv preprint arXiv:2408.10590, 2024 - arxiv.org
The challenge of imaging low-density objects in an electron microscope without causing
beam damage is significant in modern TEM. This is especially true for life science imaging …

PROJECTED MULTI-AGENT CONSENSUS EQUILIBRIUM (PMACE) FOR DISTRIBUTED RECONSTRUCTION WITH APPLICATION TO PTYCHOGRAPHY

Q Zhai - 2024 - hammer.purdue.edu
Multi-Agent Consensus Equilibrium (MACE) formulates an inverse imaging problem as a
balance among multiple update agents such as data-fitting terms and denoisers. However …

[PDF][PDF] Influence of the loss function on gradient-based iterative ptychographic reconstructions in 4D-STEM

ML Leidl, C Sachse… - BIO Web of Conferences, 2024 - bio-conferences.org
Methods We used a MoS₂ monolayer as a test case to perform STEM simulations and
experiments. Simulations were conducted with an acceleration voltage of 60 kV and 300 kV …