29 lines
1.3 KiB
Markdown
29 lines
1.3 KiB
Markdown
# Scan Line Reorder
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Fix scan line ordering artifacts from meander (serpentine) scanning, interlacing, or inverted scan direction. Equivalent to Gwyddion's reorder.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 scan line artifacts |
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## Outputs
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| Name | Type | Description |
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|------|------|-------------|
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| result | DATA_FIELD | Field with corrected scan line order |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| operation | dropdown | reverse_odd | Operation: reverse_odd, reverse_even, deinterlace_odd, deinterlace_even, flip_vertical |
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## Notes
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- **reverse_odd / reverse_even**: Reverse alternate rows to correct meander (serpentine/boustrophedon) scanning. Most SPM controllers scan left-to-right on odd lines and right-to-left on even lines; reversing odd rows fixes this.
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- **deinterlace_odd / deinterlace_even**: Keep only odd or even rows and stretch to fill the original height. Useful when alternate scan lines were acquired under different conditions.
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- **flip_vertical**: Reverse the row order (top becomes bottom). Useful when the scan direction is inverted.
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- Apply this node before Line Correction for best results.
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