Affine Correction
Fix geometric distortions from scanner nonlinearity by applying an affine transformation. Corrects shear, anisotropic scaling, and rotation. Equivalent to Gwyddion's correct_affine.c module.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input field with geometric distortion |
Outputs
| Name |
Type |
Description |
| corrected |
DATA_FIELD |
Affine-corrected field |
Controls
| Name |
Type |
Default |
Description |
| shear_x |
FLOAT |
0.0 |
Horizontal shear factor |
| shear_y |
FLOAT |
0.0 |
Vertical shear factor |
| scale_x |
FLOAT |
1.0 |
Horizontal scale factor |
| scale_y |
FLOAT |
1.0 |
Vertical scale factor |
| angle |
FLOAT |
0.0 |
Rotation angle in degrees |
Notes
- An identity transform (shear=0, scale=1, angle=0) returns the original data unchanged.
- The output shape matches the input; pixels outside the transformed region are filled by nearest-edge interpolation.
- For simple rotation without scaling/shear, use the Rotate node instead.
