Meta Data ParametersΒΆ

The tomography data files are in HDF5 format. HDF5 files have a tree structure of groups and datsets. While a great deal of meta data are saved in each file automatically by the scan engine, the locations of the most important parameters can be difficult to find. Below is a translation of parameters to their locations in the HDF5 file.

Parameter

HDF5 location

Projection data

/exchange/data

Dark fields

/exchange/data_dark

Flat fields

/exchange/data_white

Angles

/exchange/theta

Magnification

/measurement/instrument/detection_system/objective/magnification

Pixel resolution

/measurement/instrument/detection_system/objective/resolution

Exposure time

/measurement/instrument/detector/exposure_time

Equal flat and data exposures?

/process/acquisition/flat_fields/different_flat_exposure

Flat exposure time

/process/acquisition/flat_fields/flat_exposure_time

Sample X location

/measurement/instrument/sample_motor_stack/setup/x

Sample Y location

/measurement/instrument/sample_motor_stack/setup/y