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NxtomoLoader
Process categoryBrief description

Computational demand

for typical tomography data

(low, medium, high)

Comment(s)Reference(s)Common alternative process(es)
loaderTo load raw data from input file(s).Low
  1. Implements lazy loading, i. e. loading of data is delayed until the first genuine access by another process in the process list - loading times depend on data chunking of source dataset(s).
  2. Capable of handling the case of dark- and flat-field images being supplied in datasets stored in individual NeXus datasets.

NeXus file format

HDF5 data model & file format



Parameters


Brief description

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Any standard tomography NeXus scan file, generated by GDA, stores all the images (i.e. sample projections as well as dark- and flat-field images) in a single dataset located at entry1/tomo_entry/data/data, which is accompanied by another dataset containing the corresponding image-key information, located at entry1/tomo_entry/instrument/detector/image_key in the same file. The default values of NxtomoLoader's parameters have been selected to reflect this scenario. However, NxtomoLoader can be used to load dark- and flat-field data from individual NeXus datasets, if required. This can be done by modifying the flat and dark parameters appropriately (see the table above for more details).

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