HoloWizard

HoloWizard is a collection of software tools for phase retrieval in the setting of near-field holographic microscopy and tomography. It is developed at DESY, Hamburg in the group X-Ray Nanoscience and X-Ray Optics. The software is designed to cover all steps in experimental/algorithm development:

• The Core implements the ASRM algorithm, our phase retrieval engine. It includes also all neccessary auxillary functions to load and preprocess single holograms/diffraction patterns.
• The Forge generates datasets within given variation bouds either for testing new algorithms or provide training data sets for ML applications
• The Pipe enables the online and offline batch processing of holo tomograms, i.e. the phase retrieval of individual projections(along with all preprocessing steps) and the computation of the tomographic volume from the retrieved projections.
• The Livereco module can show online reconstructions of single projections during an experiment i.e. for finding a suited region of interest. It can be integrated in existing experimental control software.

This repository contains the implementation and examples shown in the papers:

• "Artifact-suppressing reconstruction of strongly interacting objects in X-ray near-field holography without a spatial support constraint". https://doi.org/10.1364/OE.514641

• "Model-based autofocus for near-field phase retrieval". https://doi.org/10.1364/OE.544573

This package is available as a pypi package under https://pypi.org/project/holowizard/