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Object Track

The Object Track links a series of Detections over time to represent the trajectory and state of a single object as it moves through the scene.

An Object Track receives a unique identifier when an object is first detected. The track is updated with each new detection associated with that object, so it can be referenced consistently across multiple frames.

The Object Track may also contain summarized and aggregated information over the lifetime of the track, such as:

  • An image snapshot of the object
  • The duration of the track
  • Maximum speed observed
  • A summary of the classifications and attributes observed during the track
  • A list of all observations (detections) associated with the track, including bounding boxes and timestamps

This information provides a comprehensive overview of the object's behavior and characteristics throughout its presence in the scene and serves as an essential component for higher-level analytics and reporting where dealing with each detection is impractical or costly.

The Object Track is formalized and available via the ADF structure Object Track. It can be consumed via com.axis.scene.object_track.v1 once the tracking session for the object has ended. For real-time tracking the Object Track's identifier is also available in each Detection via the com.axis.scene.frame.v1 data source.