29 lines
1.0 KiB
Markdown
29 lines
1.0 KiB
Markdown
# Drift Correction
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Compensate for thermal or piezo drift between scan lines. Estimates inter-row displacement via cross-correlation and shifts rows to align them. Equivalent to Gwyddion's drift.c module.
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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 with drift artifacts |
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## Outputs
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| Name | Type | Description |
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|------|------|-------------|
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| corrected | DATA_FIELD | Drift-corrected field |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| reference | dropdown | previous_row | Reference for drift estimation: previous_row (local) or mean_row (global average) |
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| direction | dropdown | horizontal | Drift direction to correct: horizontal or vertical |
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## Notes
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- Use previous_row for slow, cumulative drift. Use mean_row when drift is more random row-to-row.
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- Apply after Line Correction for best results.
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- Vertical direction transposes the correction axis — useful for column-scanned data.
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