This task creates polygon regions of interest (ROIs) from a classification raster.
Example
e = ENVI()
File = Filepath('qb_boulder_msi', Subdir=['data'], $
Root_Dir=e.Root_Dir)
Raster = e.OpenRaster(File)
ClassTask = ENVITask('ISODATAClassification')
ClassTask.INPUT_RASTER = Raster
ClassTask.Execute
Task = ENVITask('ClassificationToPolygonROI')
Task.INPUT_RASTER = ClassTask.OUTPUT_RASTER
Task.Execute
View = e.GetView()
Layer = view.CreateLayer(Raster)
rois = Task.OUTPUT_ROI
roiLayers = OBJARR(N_ELEMENTS(rois))
FOR i=0, N_ELEMENTS(rois)-1 DO roiLayers[i] = layer.AddROI(rois[i])
Syntax
Result = ENVITask('ClassificationToPolygonROI')
Input properties (Set, Get): INPUT_RASTER, OUTPUT_ROI_URI
Output properties (Get only): OUTPUT_ROI
Properties marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Properties marked as "Get" are those whose values you can retrieve but not set.
Methods
This task inherits the following methods from ENVITask:
AddParameter
Execute
Parameter
ParameterNames
RemoveParameter
Properties
This task inherits the following properties from ENVITask:
COMMUTE_ON_DOWNSAMPLE
COMMUTE_ON_SUBSET
DESCRIPTION
DISPLAY_NAME
NAME
REVISION
TAGS
This task also contains the following properties:
INPUT_RASTER (optional)
Specify a classification raster.
OUTPUT_ROI
This is a reference to the output ROI.
OUTPUT_ROI_URI (optional)
Specify a string with the fully qualified path and filename for OUTPUT_ROI.
Version History
API Version
4.3
See Also
ENVITask, ClassificationToPixelROI Task, ClassificationToShapefile Task, ROIToClassification Task