Fig. 2.

Detailed lines ontology and player correspondences. Left: We define 20 line classes, covering each line of the field with a specific name. We assume that the main camera is located at the bottom of the figure, close to the middle line. Line annotations can be leveraged for a camera calibration task, or can help localize the actions on the field. Right: We annotate player correspondences between the action frame (top left) and the replay frames of the same action from different cameras. When a jersey number is visible, we propagate it to the other instances of that player. Otherwise, we use a generic literal name. We do not tag players without correspondences.