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ISIS Application Documentation

butterworth

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Apply Butterworth filter for cube in fft frequency domain

Description
Categories
Groups
History

Description

Applies a Butterworth filter to a cube. This filter is used on images in the frequency domain. Use the fft app to transform an image from a spacial to frequency domain and use the ifft app to transform from frequency to spacial.

Categories

Parameter Groups

Files

Name Description
FROMInput file
TOOutput cube

Parameter Info

Name Description
CUTOFF Cutoff frequency
ORDER Order
BANDWIDTH The width of the cutoff band.

Filter Type

Name Description
TYPEType of filter

Files: FROM

Description

Cube to filter

Type cube
File Mode input
Filter *.cub

Files: TO

Description

The resultant cube

Type cube
File Mode output
Filter *.cub

Parameter Info: CUTOFF

Description

The specified cutoff frequency.

Type double
Default 0.0
Minimum 0.0 (inclusive)

Parameter Info: ORDER

Description

The order of the Butterworth filter.

Type integer
Default 1
Minimum 0 (inclusive)

Parameter Info: BANDWIDTH

Description

This parameter is used when the type specified is "bandpass" or "bandstop".

Type double
Default 1.0
Minimum 0.0 (inclusive)

Filter Type: TYPE

Description

This is the type of filter to be performed on the input.

Type string
Default LOWPASS
Option List:
Option Brief Description
LOWPASSLowpass filter Applies a lowpass filter to an image in the frequency domain.
HIGHPASSHighpass filter Applies a highpass filter to an image in the frequency domain.
BANDPASSBandpass filter Applies a bandpass filter to an image in the frequency domain.
BANDSTOPBandstop filter Applies a bandstop filter to an image in the frequency domain.

History

Jacob Danton2005-11-28 Original version
Brendan George2006-09-21 Documentation fixes
Steven Lambright2008-05-12 Removed references to CubeInfo
Steven Lambright2008-10-17 Removed outdated examples from the documentation.
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File Modified: 02/24/2025 16:08:53