Scan Line Reorder
Fix scan line ordering artifacts from meander (serpentine) scanning, interlacing, or inverted scan direction. Equivalent to Gwyddion's reorder.c module.
Inputs
| Name |
Type |
Required |
Description |
| field |
DATA_FIELD |
Yes |
Input field with scan line artifacts |
Outputs
| Name |
Type |
Description |
| result |
DATA_FIELD |
Field with corrected scan line order |
Controls
| Name |
Type |
Default |
Description |
| operation |
dropdown |
reverse_odd |
Operation: reverse_odd, reverse_even, deinterlace_odd, deinterlace_even, flip_vertical |
Notes
- 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.
- 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.
- flip_vertical: Reverse the row order (top becomes bottom). Useful when the scan direction is inverted.
- Apply this node before Line Correction for best results.
