Data compression strategies for ptychographic diffraction imaging

Lars Loetgering*, Max Rose, David Treffer, Ivan A. Vartanyants, Axel Rosenhahn, Thomas Wilhein

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


Ptychography is a computational imaging method for solving inverse scattering problems. To date, the high amount of redundancy present in ptychographic data sets requires computer memory that is orders of magnitude larger than the retrieved information. Here, we propose and compare data compression strategies that significantly reduce the amount of data required for wavefield inversion. Information metrics are used to measure the amount of data redundancy present in ptychographic data. Experimental results demonstrate the technique to be memory efficient and stable in the presence of systematic errors such as partial coherence and noise.

Original languageEnglish
Pages (from-to)475-483
Number of pages9
JournalAdvanced Optical Technologies
Issue number6
Publication statusPublished - 20 Dec 2017
Externally publishedYes


  • diffraction imaging
  • phase retrieval
  • ptychography


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