Spot Removal
Fill defect pixels (hot pixels, dropouts, scan artifacts) by interpolation. The mask defines defect locations. Equivalent to Gwyddion spotremove.c.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input field with defect pixels |
| mask |
IMAGE |
No |
Binary mask marking defect pixel locations; if omitted, no inpainting is performed |
Outputs
| Name |
Type |
Description |
| result |
DATA_FIELD |
Field with defect pixels replaced by interpolated values |
Controls
| Name |
Type |
Default |
Description |
| method |
dropdown |
laplace |
Inpainting method: laplace (smooth Laplace equation solution), mean (local mean), or zero |
| max_iter |
INT |
100 |
Maximum number of iterations for the Laplace solver (1–2000) |
Limitations
- Large masked regions may not converge fully within max_iter iterations using the Laplace method.
- The mean method uses a simple neighbourhood average and may leave visible discontinuities at large defect clusters.
