Use the File Selection panel to select input files for processing, to provide an output rootname, and to select any ancillary files for processing.

  1. Click Select Input File. The File Selection dialog appears.
  2. Select a hyperspectral image that has wavelength information defined for each band. Click OK.
  3. In the File Selection panel, click Spatial Subset to perform spatial subsetting.
  4. You can choose to process a subset of spectral bands by clicking one of the following buttons in the File Selection panel:
    • Graphically: The THOR Spectral Subsetting dialog appears.
    • By List: The File Spectral Subset dialog appears.
  5. You can optionally perform destriping and spectral binning. Other bad data tools are available under the Spectral > THOR Workflows > Tools menu option.
  6. By default, the output rootname will be the same as that of the input file. Miscellaneous output files produced during the workflow will use this rootname, plus other identifiers as needed (for example, _subset). Click Select Output Root Name to change the rootname and directory for the output files.
  7. By default, the output file is written to the same directory as the input file. You can choose another output directory, but if it is a read-only directory, ENVI will default to the Temp Directory. See ENVI Classic Help for details on this preference.

  8. In the context of THOR, an ancillary file is a high-resolution panchromatic image of the same area covered by the hyperspectral image; it will be used later in the Review Detections step. Ancillary files are not applicable to all workflows, so the option to select one will not always be available from the File Selection panel. You can only select an ancillary file if the input hyperspectral image is georeferenced. The ancillary file must also be georeferenced.