Augmented projections for ptychographic imaging

Stefano Marchesini, Andre Schirotzek, Chao Yang, Hau Tieng Wu, Filipe Maia

Research output: Contribution to journalArticlepeer-review


Ptychography is a popular technique to achieve diffraction limited resolution images of a two- or three-dimensional sample using high frame rate detectors. We introduce a relaxation of common projection algorithms to account for instabilities given by intensity and background fluctuations, position errors, or poor calibration using multiplexing illumination. This relaxation introduces an additional phasing optimization at every step that enhances the convergence rate of common projection algorithms. Numerical tests exhibit the exact recovery of the object and the perturbations when there is high redundancy in the data.

Original languageEnglish (US)
Article number115009
JournalInverse Problems
Issue number11
StatePublished - Nov 2013

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Signal Processing
  • Mathematical Physics
  • Computer Science Applications
  • Applied Mathematics


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