Polygon vs Polyline Annotation in AI: What’s the Difference?
Polygon annotation draws closed shapes around area-based objects to capture detailed boundaries for segmentation. Polyline annotation connects points in open paths to represent linear structures like lanes or wires. Each suits different object geometry and model requirements in computer vision.
Choosing between them affects labeling time, cost, and model performance. Polygons provide pixel-level accuracy but require more effort, while polylines are faster and efficient for path detection but cannot produce full area masks.
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