Kuwahara Filter
Edge-preserving smoothing using Kuwahara's minimum-variance quadrant method. Unlike Gaussian blur, sharp boundaries are preserved. Equivalent to Gwyddion's Kuwahara filter.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input field to filter |
Outputs
| Name |
Type |
Description |
| filtered |
DATA_FIELD |
Smoothed field with preserved edges |
Controls
| Name |
Type |
Default |
Description |
| iterations |
INT |
1 |
Number of times the 5×5 Kuwahara pass is applied (1–20) |
Limitations
- The kernel is fixed at 5×5 pixels; coarser smoothing requires more iterations.
- Multiple iterations increase processing time proportionally; 20 iterations on a large field may be slow.
