MLTrainingDataFromROIs Task
This task builds a spectral raster from an input raster and ROIs for use with ENVI Machine Learning routines.
Example
; Start the application
e = ENVI()
; Open an input raster file
RasterFile = Filepath('qb_boulder_msi', Subdir=['data'], $
Root_Dir=e.Root_Dir)
Raster = e.OpenRaster(RasterFile)
; Open an input ROI file
ROIFile = Filepath('qb_boulder_roi.xml', Subdir=['data'], $
Root_Dir=e.Root_Dir)
ROI = e.OpenROI(ROIFile)
; Get the statistics task from the catalog of ENVITasks
StatsTask = ENVITask('NormalizationStatistics')
; Define inputs
StatsTask.INPUT_RASTERS = Raster
; Run the task
StatsTask.Execute
; Get the data prep task from the catalog of ENVITasks
DataPrepTask = ENVITask('MLTrainingDataFromROIs')
; Define inputs
DataPrepTask.INPUT_RASTER = Raster
DataPrepTask.INPUT_ROI = ROI
DataPrepTask.BACKGROUND_LABELS = ['Disturbed Earth', 'Water']
DataPrepTask.NORMALIZE_MIN_MAX = StatsTask.Normalization
DataPrepTask.Execute
; Path to the training raster
Print, DataPrepTask.Output_Raster_URI
Syntax
Result = ENVITask('MLTrainingDataFromROIs')
Input parameters (Set, Get): BACKGROUND_LABELS, INPUT_RASTER, INPUT_ROI, NORMALIZE_MIN_MAX, OUTPUT_RASTER_URI
Output parameters (Get only): OUTPUT_RASTER
Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.
Input Parameters
BACKGROUND_LABELS (optional)
Specify the ROI classes to be used as background, classes of no interest.
INPUT_RASTER (required)
Specify the input raster to use for extracting spectral data.
INPUT_ROI (required)
Specify the ROIs that indicate the label pixels for each desired class in the INPUT_RASTER.
NORMALIZE_MIN_MAX (required)
Specify the data value that corresponds to 0% and 100% reflectance.
OUTPUT_RASTER_URI (optional)
Specify a string with the fully qualified filename and path to export the associated OUTPUT_RASTER.
- If you set this parameter to an asterisk symbol (*), the output raster will be virtual and not written to disk.
- If you do not specify this parameter, or set it to an exclamation symbol (!), a temporary file will be created.
- If you set it to the hash symbol (#), ENVI creates a file in the temporary directory, but this file will not be deleted when ENVI closes.
Output Parameters
OUTPUT_RASTER
This is a reference to the output raster of filetype ENVI.
Methods
Execute
Parameter
ParameterNames
See ENVI Help for details on these ENVITask methods.
Properties
DESCRIPTION
DISPLAY_NAME
NAME
REVISION
See the ENVITask topic in ENVI Help for details.
Version History
|
Machine Learning 2.0 |
Introduced |