Gradient
Compute the spatial gradient using a Sobel operator. Outputs the gradient magnitude, x-component, y-component, or azimuthal direction.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input field |
Outputs
| Name |
Type |
Description |
| gradient |
DATA_FIELD |
Gradient output in the selected component |
Controls
| Name |
Type |
Default |
Description |
| component |
dropdown |
magnitude |
Output component: magnitude (√(gx²+gy²)), x (horizontal gradient), y (vertical gradient), or azimuth (angle in degrees) |
Notes
- Gradient components are in units of z_unit/xy_unit; azimuth is in degrees.
- Sobel operator uses a 3×3 kernel; sub-pixel features smaller than one pixel cannot be resolved.
