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Kaz Wanelik (Unlicensed)

Kaz Wanelik (Unlicensed)

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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).Uses lazy loading (see Comment 1).
  1. When data are eventually required for processing Data are loaded on the first access request by the next process in a given the process list, then they are actually loaded, with ; loading times depending depend on data chunking of the input source dataset(s).
  2. Capable of handling the case of dark- and flat-field images being supplied in datasets stored in individual NeXus datasets.


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Any standard tomography NeXus scan file, generated by GDA in DLS, 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 with containing the corresponding image-key information, located at entry1/tomo_entry/instrument/detector/image_key in the same file. Hence, the The default values of NxtomoLoader's parameters have been selected to match 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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