Contrast-transfer-function phase retrieval based on compressed sensing

Research output: Contribution to journalArticle


We report on a new contrast-transfer-function (CTF) phase-retrieval method based on the alternating direction method of multipliers (ADMMs), which allows us to exploit any compressed sensing regularization scheme reflecting the sparsity of the investigated object. The proposed iterative algorithm retrieves accurate phase maps from highly noisy single-distance projection microscopy data and is characterized by a stable convergence, not bounded to the prior knowledge of the object support or to the initialization strategy. Experiments on simulated and real datasets show that ADMM-CTF yields reconstructions with a substantial lower amount of artifacts and enhanced signal-to-noise ratio compared to the standard analytical inversion.


External organisations
  • Paul Scherrer Institute
  • ETH Zürich
  • European Synchrotron Radiation Facility
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Pages (from-to)1133-1136
Number of pages4
JournalOptics Letters
Issue number6
Publication statusPublished - 2017 Mar 15
Publication categoryResearch
Externally publishedYes