Loading data

HTTomo’s standard tomography loader reads projection data, darks, flats, and rotation angles from HDF5/NeXus files. It can discover NXtomo datasets automatically, combine data from separate files, crop the input, and select an individual scan from a continuous acquisition.

• Standard tomography loader
  • Automatic NXtomo discovery
• Darks and flats
  • Stored with the projections
  • Separate datasets without image keys
  • Separate data with image keys
  • Missing darks or flats
  • Ignoring darks or flats
• Rotation angles
• Previewing
  • Previewing in the loader
  • The preview parameter
  • Using the full dataset
  • Enabling data preview
  • Using begin, mid and end with offsets
  • Using mid by itself
  • Omitting preview fields
• Continuous-scan subsets
• Creating an NXtomo file
  • Input layout
  • From NumPy arrays
  • From TIFF stacks
  • What the script writes
  • Loading the result in HTTomo
  • Reusable NeXus writer code