RGBToHSIRaster Task

This task creates a new raster that has been transformed from a red/green/blue (RGB) to hue/saturation/intensity color space.

The virtual raster associated with this task is ENVIRGBToHSIRaster.

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)

; Process a spectral subset

Subset = ENVISubsetRaster(Raster, BANDS=[2,1,0])

; Get the task from the catalog of ENVITasks

Task = ENVITask('RGBtoHSIRaster')

; Define inputs

Task.INPUT_RASTER = Subset

; Run the task

Task.Execute

; Get the collection of data objects currently available in the Data Manager

DataColl = e.Data

; Add the output to the Data Manager

DataColl.Add, Task.OUTPUT_RASTER

; Display the result

View = e.GetView()

Layer = View.CreateLayer(Task.OUTPUT_RASTER)

Syntax

Result = ENVITask('RGBtoHSIRaster')

Input properties (Set, Get): INPUT_RASTER, OUTPUT_RASTER_URI

Output properties (Get only): OUTPUT_RASTER

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 ENVIRaster. It must have three bands in the following order: Red, Green, and Blue. If your original raster has more than three bands, or if it has red/green/blue bands that are not in the correct order, use ENVISubsetRaster to create a spectral subset for input to ENVIRGBToHSIRaster. Use the BANDS property to define a three-band subset, using zero-based band numbers.

OUTPUT_RASTER

This is a reference to the output raster of filetype ENVI.

OUTPUT_RASTER_URI (optional)

Specify a string with the fully qualified filename and path to export the associated OUTPUT_RASTER.

If you set this property to an asterisk symbol (*), the output raster will be virtual and not written to disk.
If you do not specify this property, or set it to an exclamation symbol (!), a temporary file will be created.

Version History

ENVI 5.3. 2	Introduced
ENVI 5.5	OUTPUT_RASTER_URI now supports '*', which allows OUTPUT_RASTER to be virtual output.

API Version

4.2