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 |