Grain Distributions
Compute a histogram distribution of a grain property from a labeled mask. Supported properties: area, equivalent diameter, mean height, max height, volume, and boundary length. Equivalent to Gwyddion's grain_dist.c module.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input surface data |
| mask |
IMAGE |
Yes |
Binary mask defining grain regions |
Outputs
| Name |
Type |
Description |
| distribution |
LINE_DATA |
Histogram of the selected grain property |
Controls
| Name |
Type |
Default |
Description |
| property |
dropdown |
area |
Grain property to plot: area, equiv_diameter, mean_height, max_height, volume, boundary_length |
| n_bins |
INT |
30 |
Number of histogram bins (5–200) |
| min_size |
INT |
10 |
Minimum grain size in pixels to include (1–100000) |
Notes
- Volume is computed relative to the mean height of the non-grain (background) region.
- Boundary length is estimated by counting boundary pixels and multiplying by the pixel size.
- For per-grain statistics (not histograms), use Grain Analysis instead.
- For aggregate summary statistics, use Grain Summary.
