Alert - Region

Generates an alert when an object is present within a specified region for a specified amount of time. Before using this analysis engine, configure a task such as Object Class Recognition to track objects.

Configuration Parameter Description
FreeformRegion The region of the scene that you want to monitor.
Input The name of the image track to analyze.
MinimumTime The amount of time that an object must remain within the region.
Region The region of the scene that you want to monitor.
Type The analysis engine to use. Set this parameter to AlertRegion.

Output Tracks

Output track Description
Data Contains one record for each object that remains within the region for longer than MinimumTime, for each video frame.
Result Contains one record for each object that remains within the region for longer than MinimumTime. If an object moves in and out of the region several times, Media Server can produce several results with the same ID.
ResultWithSource

The same as the Result track, but each record also includes the best source frame.

Start

The same as the Data track, except it contains only the first record of each event.

End

The same as the Data track, except it contains only the last record of each event.

Alert

Contains one record for each object that remains within the region for longer than MinimumTime. If an object moves in and out of the region several times, Media Server can produce several alerts with the same ID.

This track differs from the Result track because records are created as soon as the object meets the minimum time requirement, rather than when the object exits the region.

AlertWithSource

The same as the Alert track, but each record also includes the source frame.

To see an example record, use the action GetExampleRecord.