PSDF
Compute the two-dimensional power spectral density function with Gwyddion-style window RMS compensation and centered zero frequency. Equivalent to psdf2d / gwy_data_field_2dpsdf.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input spatial-domain field |
Outputs
| Name |
Type |
Description |
| psdf |
DATA_FIELD |
2D power spectral density, centered on DC |
Controls
| Name |
Type |
Default |
Description |
| windowing |
dropdown |
hann |
Window function applied before FFT to reduce spectral leakage: hann, hamming, blackman, or none |
| level |
dropdown |
mean |
Pre-processing: subtract mean, subtract plane, or none |
Limitations
- Output is in the frequency domain; physical units on axes are spatial frequency (1/m) and PSDF units are z_unit²·m².
- Window RMS compensation is applied to normalize the spectral density consistently across window choices.
