Why qpformat?

There is a multitude of phase-imaging techniques that inevitably comes with a broad range of quantitative phase imaging (QPI) file formats. In addition, raw data, such as digital holographic microscopy (DHM) images, must be preprocessed to access the phase encoded in the interference pattern. Qpformat provides a unified and user-friendly interface for loading QPI data. It is based on the qpimage library and thus benefits from its hdf5-based data structure (e.g. elaborate background correction, meta data management, and transparent data storage). Furthermore, qpformat can manage large datasets (e.g. many holograms in one folder) without running out of memory by means of its lazily-evaluated SeriesData class.

Supported file formats

Class Storage type Description
SeriesFolder multiple Folder-based wrapper file format
SeriesHdf5HyperSpy hologram HyperSpy hologram series (HDF5 format)
SeriesHdf5Qpimage phase,amplitude Qpimage series (HDF5 format)
SeriesHdf5QpimageSubjoined phase,amplitude Subjoined qpimage series (HDF5 format), may contain other data
SeriesZipTifHolo hologram Off-axis hologram series (zipped TIFF files)
SeriesZipTifPhasics phase,intensity Phasics series data (zipped “SID PHA*.tif” files)
SingleHdf5Qpimage phase,amplitude Qpimage single (HDF5 format)
SingleNpyNumpy multiple Numpy complex field or phase data (numpy binary format)
SingleTifHolo hologram Off-axis hologram image (TIFF format)
SingleTifPhasics phase,intensity Phasics image (“SID PHA*.tif”)