Navigate to the "Label Definitions" sub-tab of your project
Type label name in the "Name" field
Choose Polygon from the "Type" drop-down
Select label color from the color chooser menu
Click "Save" button
Repeat as needed for multiple labels
Polygons enable semantic and instance segmentation.
Architectures such as FCN and Mask R-CNN support polygons (or pixel masks) as input. Common use cases include visually segmenting the road, pedestrians, and cars for automated vehicles.
This is useful for having classes associated with higher level instances. Example: drawing rectangles around birds for object detection, but having a class for types of bird within the rectangle (Duck, Geese, etc...).
Click "Add Sublabel"
Type a sublabel name
Choose sublabel type
Fill out label options
A Polygon schema element creates an array of objects with data consisting of an array of vertices. Each vertex is a XY coordinate relative (0.0 to 1.0) to width and height respectively. The last point is repeated indicating the Polygon is closed.