85 citations · 199 across the 4 of their papers we have counts for
6 papers · 1 filter
A matrix-free Levenberg-Marquardt algorithm for efficient ptychographic phase retrieval
Saugat Kandel, S. Maddali, Youssef S G Nashed +3
The phase retrieval problem, where one aims to recover a complex-valued image from far-field intensity measurements, is a classic problem encountered in a range of imaging applicat…
Adorym: A multi-platform generic x-ray image reconstruction framework based on automatic differentiation
Ming Du, Saugat Kandel, Junjing Deng +7
We describe and demonstrate an optimization-based x-ray image reconstruction framework called Adorym. Our framework provides a generic forward model, allowing one code framework to…
Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
Ming Du, Doga Gursoy, Chris Jacobsen
Different studies in x-ray microscopy have arrived at conflicting conclusions about the dose efficiency of imaging modes involving the recording of intensity distributions in the n…
Three dimensions, two microscopes, one code: automatic differentiation for x-ray nanotomography beyond the depth of focus limit
Ming Du, Youssef S. G. Nashed, Saugat Kandel +2
Conventional tomographic reconstruction algorithms assume that one has obtained pure projection images, involving no within-specimen diffraction effects nor multiple scattering. Ad…
Using Automatic Differentiation as a General Framework for Ptychographic Reconstruction
Saugat Kandel, S. Maddali, Marc Allain +3
Coherent diffraction imaging methods enable imaging beyond lens-imposed resolution limits. In these methods, the object can be recovered by minimizing an error metric that quantifi…
X-ray tomography of extended objects: a comparison of data acquisition approaches
Ming Du, Rafael Vescovi, Kamel Fezzaa +2
The penetration power of x-rays allows one to image large objects. For example, centimeter-sized specimens can be imaged with micron-level resolution using synchrotron sources. In…