ISIS Application Documentation
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Apply a Fourier Transform on a cube
| Overview | Parameters | Example 1 |
Description
This programs takes a single input cube, applies a Fourier Transform,
and stores the result in two bands of an output cube containing the magnitude and
phase angle data. If the original image has dimensions that are not powers
of two, it is automatically padded with zeroes. These images can then be
used in the ifft program to recover the original.
CategoriesRelated Objects and DocumentsApplicationsHistory
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| U.S. Department of the Interior | U.S. Geological Survey ISIS | Privacy & Disclaimers | Astrogeology Research Program To contact us, please post comments and questions on the USGS Astrogeology Discussion Board To report a bug, or suggest a feature go to: ISIS Github File Modified: 02/21/2025 19:28:10 |
Parameter GroupsFiles
Handling Special Pixels
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| U.S. Department of the Interior | U.S. Geological Survey ISIS | Privacy & Disclaimers | Astrogeology Research Program To contact us, please post comments and questions on the USGS Astrogeology Discussion Board To report a bug, or suggest a feature go to: ISIS Github File Modified: 02/21/2025 19:28:10 |
Files: FROM
Description
The input cube on which the Fourier transform is applied.
| Type | cube |
|---|---|
| File Mode | input |
| Filter | *.cub |
Files: MAGNITUDE
Description
The resultant cube containing the image magnitude data.
| Type | cube |
|---|---|
| File Mode | output |
| Pixel Type | real |
| Filter | *.cub |
Files: PHASE
Description
The resultant cube containing the image phase angle data..
| Type | cube |
|---|---|
| File Mode | output |
| Pixel Type | real |
| Filter | *.cub |
Handling Special Pixels: REPLACEMENT
Description
This option specifies what special pixels will be replaced with.
| Type | string | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Default | ZEROES | |||||||||
| Option List: |
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Example 1fft example Description
Example of the Fourier transform.
Command Line
fft from=peaks.cub magnitude=peaks_magnitude.cub phase=peaks_phase.cub
Compute the Fourier transform of peaks.cub and store the results in peaks_magnitude.cub and peaks_phase.cub
GUI Screenshot
Input Image
Output Images
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![fft GUI](javascript:popUpNewWindow ("assets/image/fftGui.jpg",512, 512))
![Input image](javascript:popUpNewWindow ("assets/image/peaks.jpg",512, 512))
![Magnitude image](javascript:popUpNewWindow ("assets/image/fftMag.jpg",512, 512))
![Phase image](javascript:popUpNewWindow ("assets/image/fftPhase.jpg",512, 512))
| U.S. Department of the Interior | U.S. Geological Survey ISIS | Privacy & Disclaimers | Astrogeology Research Program To contact us, please post comments and questions on the USGS Astrogeology Discussion Board To report a bug, or suggest a feature go to: ISIS Github File Modified: 02/21/2025 19:28:10 |