ClassificationToPolygonROI Task

This task creates polygon regions of interest (ROIs) from a classification raster.

Example

; Start the application

e = ENVI()

; Open an input file

File = Filepath('qb_boulder_msi', Subdir=['data'], $

Root_Dir=e.Root_Dir)

Raster = e.OpenRaster(File)

; Create a classification ENVIRaster

ClassTask = ENVITask('ISODATAClassification')

ClassTask.INPUT_RASTER = Raster

ClassTask.Execute

; Convert the classification pixels to polygon ROIs

Task = ENVITask('ClassificationToPolygonROI')

Task.INPUT_RASTER = ClassTask.OUTPUT_RASTER

Task.Execute

; Display the ROIs

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 parameters (Set, Get): INPUT_RASTER, OUTPUT_ROI_URI

Output parameters (Get only): OUTPUT_ROI

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

INPUT_RASTER (optional)

Specify a classification raster.

OUTPUT_ROI_URI (optional)

Specify a string with the fully qualified path and filename for OUTPUT_ROI.

Output Parameters

OUTPUT_ROI

This is a reference to the output ROI.

Methods

Execute

Parameter

ParameterNames

Properties

Version History

ENVI 5.6

Introduced