Inverse 2D FFT
Reconstruct a spatial-domain image from a 2D frequency spectrum. For exact reconstruction, connect magnitude/phase (or log magnitude/phase, or PSDF/phase) from the 2D FFT node. If phase is omitted, zero phase is assumed.
Inputs
| Name |
Type |
Required |
Description |
| spectrum |
DATA_FIELD |
Yes |
Frequency-domain field (output of FFT 2D) |
| phase |
DATA_FIELD |
No |
Phase field; if omitted, zero phase is used |
Outputs
| Name |
Type |
Description |
| image |
DATA_FIELD |
Reconstructed spatial-domain field |
Controls
| Name |
Type |
Default |
Description |
| representation |
dropdown |
magnitude |
How to interpret the spectrum input: magnitude, log_magnitude, or psdf |
Limitations
- The spectrum input must be a frequency-domain DATA_FIELD; connecting a spatial-domain field raises an error.
- If phase is connected, it must also be a frequency-domain field with the same shape as the spectrum.
- Reconstruction from PSDF (which discards phase) assumes zero phase and produces a symmetric result.
