28 lines
1.1 KiB
Markdown
28 lines
1.1 KiB
Markdown
# Fractal Dimension
|
|
|
|
Calculate the surface fractal dimension using Gwyddion's partitioning, cube counting, triangulation, power-spectrum, or HHCF methods. The in-node graph shows the log-log curve and allows dragging the fit range.
|
|
|
|
## Inputs
|
|
|
|
| Name | Type | Required | Description |
|
|
|------|------|----------|-------------|
|
|
| field | DATA_FIELD | Yes | Input surface field |
|
|
|
|
## Outputs
|
|
|
|
| Name | Type | Description |
|
|
|------|------|-------------|
|
|
| dimension | FLOAT | Estimated fractal dimension |
|
|
|
|
## Controls
|
|
|
|
| Name | Type | Default | Description |
|
|
|------|------|---------|-------------|
|
|
| method | dropdown | partitioning | Algorithm: partitioning, cube_counting, triangulation, psdf (power spectrum), or hhcf (structure function) |
|
|
| interpolation | dropdown | linear | Interpolation used when resampling the field to a square grid: linear, nearest, or cubic |
|
|
|
|
## Notes
|
|
|
|
- The field is resampled to a square grid internally; highly anisotropic scan sizes may introduce interpolation artefacts.
|
|
- Fit range can be adjusted interactively on the log-log plot; the default range covers the full data.
|