CreateSubrectsFromROI Task

This task will create an array of subrects based on regions of interest (ROIs).

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)

RoiFile = Filepath('qb_boulder_roi.xml', $

ROOT_DIR=e.Root_Dir, $

SUBDIRECTORY=['data'])

Rois = e.OpenRoi(RoiFile)

; Get the task from the catalog of ENVITasks

Task = ENVITask('CreateSubrectsFromROI')

; Define inputs

Task.INPUT_RASTER = Raster

Task.INPUT_ROI = Rois

; Run the task

Task.Execute

; Get the resulting subrects

Subrects = Task.SUBRECTS

; Get a list of names

SubNames = Task.SUBRECT_NAMES

; Print information about the subrects

Help, Subrects

IDL prints:

SUBRECTS LONG =Array[4, 3]

Syntax

Result = ENVITask('CreateSubrectsFromROI')

Input properties (Set, Get): INPUT_RASTER, INPUT_ROI

Output properties (Get only):SUBRECTS, SUBRECT_NAMES

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:

Properties

This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

INPUT_RASTER (required)

Specify the input raster.

INPUT_ROI (required)

Specify an ROI or array of ROIs that define the areas for the subrects.

SUBRECTS

This property contains an array of output subrects.

SUBRECT_NAMES

This property contains the names of each output subrect.

API Version

4.2

Version History

ENVI 5.5

Introduced