28 lines
922 B
Markdown
28 lines
922 B
Markdown
# Edge Detect
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Detect edges using Sobel, Prewitt, Laplacian, or Laplacian-of-Gaussian (LoG) operators. Equivalent to gwy_data_field_filter_sobel / gwy_data_field_filter_laplacian.
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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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| edges | DATA_FIELD | Edge-detected output field |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| method | dropdown | sobel | Edge detection operator: sobel, prewitt, laplacian, or log (Laplacian of Gaussian) |
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| sigma | FLOAT | 1.0 | Gaussian smoothing sigma used only for the LoG operator (0.1-10.0) |
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## Notes
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- sigma is ignored for sobel, prewitt, and laplacian methods.
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- Sobel and Prewitt return gradient magnitude; Laplacian and LoG return signed second-derivative values.
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