Refine Your Selection

Fine-tune AI segmentation results with simplification, expand/contract, fill holes, and rounded corners.

The Refine panel appears below the main controls during a session. Settings persist across segmentations.

Simplify Outline

Slider (0-1000) to reduce jagged edges:

  • 0-50: original detailed outline
  • 50-200: smoothed, good for most cases
  • 200+: heavily simplified, fewer vertices

Expand / Contract

Slider (-1000 to +1000) to grow or shrink the polygon:

  • Positive: expand outward (AI selected too tight)
  • Negative: contract inward (AI selected too loose)

Fill Holes

Closes internal gaps (e.g., shadow gaps in a roof).

Round Corners

Smooths angular edges into curves. Useful for tree canopies, water bodies, fields.