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:
This task also contains the following properties:
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
4.2
See Also
ENVITask, DirectionalFilter Task, GaussianHighPassFilter Task, GaussianHighPassKernel Task, GaussianLowPassFilter Task, HighPassFilter Task, HighPassKernel Task, LaplacianFilter Task, LaplacianKernel Task, LowPassFilter Task, LowPassKernel Task, MedianFilter Task, RasterConvolution Task, SobelFilter Task, RobertsFilter Task