Grain Filter
Remove grains from a binary mask based on size and border contact. Equivalent to Gwyddion's grain_filter module (grain_filter.c).
Inputs
| Name |
Type |
Required |
Description |
| mask |
IMAGE |
Yes |
Binary mask containing grain regions to filter |
Outputs
| Name |
Type |
Description |
| filtered_mask |
IMAGE |
Binary mask with unwanted grains removed |
Controls
| Name |
Type |
Default |
Description |
| min_area |
INT |
10 |
Discard grains with fewer pixels than this value (0 = no lower limit) |
| max_area |
INT |
0 |
Discard grains with more pixels than this value (0 = no upper limit) |
| remove_border |
BOOLEAN |
False |
Discard any grain that touches the image edge |
Limitations
- Grain detection uses 4-connected or 8-connected labeling; the exact connectivity is determined by the implementation.
- min_area and max_area are in pixels, not physical units.
