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