MedianFilter Task

This task performs median convolution filtering.

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)

 

; Get the task from the catalog of ENVITasks

Task = ENVITask('MedianFilter')

 

; Define inputs

Task.INPUT_RASTER = Raster

 

; Set a square window size for median filtering

Task.WINDOW_SIZE = 5

 

; 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('MedianFilter')

Input properties (Set, Get): ADD_BACK, INPUT_RASTER, OUTPUT_RASTER_URI, WINDOW_SIZE

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:

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:

ADD_BACK (optional)

Specify a filter add-back percentage value between 0.0 and 1.0. A value of 1.0 is equal to 100%.

INPUT_RASTER (required)

Specify a raster on which to perform median convolution filtering.

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 of the associated OUTPUT_RASTER. If you do not specify this property, or set it to an exclamation symbol (!), a temporary file will be created.

WINDOW_SIZE (optional)

Specify the square window column/row size for median filtering. The default value is 3.

Version History

ENVI 5.3

Introduced

API Version

4.2

See Also

ENVITask, DirectionalFilter Task, DirectionalKernel Task, GaussianHighPassFilter Task, GaussianHighPassKernel Task, GaussianLowPassKernel Task, GaussianLowPassFilter Task,HighPassFilter Task, HighPassKernel Task, LaplacianFilter Task, LaplacianKernel Task, LowPassFilter Task, LowPassKernel Task, RobertsFilter Task, SobelFilter Task, RasterConvolution Task