Polylines are a type of annotation used to represent linear structures by connecting a series of points with straight lines, forming paths or shapes without filled areas.
🔹 Key Features:
- Made up of multiple connected line segments.
- Ideal for outlining non-rigid or continuous objects.
- More flexible than bounding boxes or polygons for certain tasks.
🔹 Use Cases:
River or boundary mapping in satellite images.
Road and lane marking in autonomous driving.
Blood vessel annotation in medical imaging.
Electrical wiring/path tracing in industrial blueprints.