First day of “Deep learning, image analysis, inverse problems, and optimization (DIPOpt)” was very fruitful. Three talks by Martin Storath, Odyssée Merveille, and Xiaohao Cai. In addition, I had the chance to present a poster on Electron Ptychography.
#ptychography #microscopy #electronmicroscop #phaseretrieval #InverseProblem

Hello #AIP2023 conference, Session MS59-1: "Advanced Reconstruction and #PhaseRetrieval in #Nano #XRay #Tomography"
#AppliedInverseProblems

Here is a recent paper from my previous gig at #argonnenationallaboratory published in #npjcompumats. We demonstrate #coherent #diffraction #xrays #imaging at the #advancedphotonsource #synchrotron through a new #optimization based #phaseretrieval scheme. Our method effectively leverages the power of #hpc to vastly improve #3Dimensional reconstructions of defected #crystals on the #nanoscale.

https://www.nature.com/articles/s41524-023-01022-7

#physics #materialscience #microstructure #nanoscience #argonnenationallab

Oleh Melnyk, Helmholtz Munich: Understanding gradient methods for blind #ptychography
[#xray #imaging #phaseretrieval]

Scanning technique with overlapping illuminations, to invert far-field intensities into near-field amplitude and phase, and recover both object and illumination

But … why does it work?