GaussianLowPassKernel Task

This task returns a Gaussian low pass kernel for use with convolution filtering.

Example

; Start the application

e = ENVI(/HEADLESS)

; Get the task from the catalog of ENVITasks

Task = ENVITask('GaussianLowPassKernel')

; Define kernel size

Task.KERNEL_SIZE = [3,5]

; Run the task

Task.Execute

; Print the output kernel

print, Task.OUTPUT_KERNEL

IDL prints:

0.000102984   0.00360521  0.000102984

0.00479140     0.167734   0.00479140

  0.0172329     0.603278    0.0172329

 0.00479140     0.167734   0.00479140

0.000102984   0.00360521  0.000102984

Syntax

Result = ENVITask('GaussianLowPassKernel')

Input properties (Set, Get): KERNEL_SIZE

Output properties (Get only): OUTPUT_KERNEL

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

KERNEL_SIZE (optional)

Specify a two-element array [n,m] as the kernel size, where n is the number of columns and m is the number of rows. The default value is [3,3].

OUTPUT_KERNEL

This is the Gaussian low pass kernel output.

Version History

ENVI 5.3

Introduced

API Version

4.3