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The Left Objects module can generate alerts when an object is left in a specific area of ​​the image or when something in the scene is changed. Example: A suitcase left on the floor, a key that appears on top of a table. From these events it is possible to recover the video, generate alarms and reports.

 

The analytical modules were made to help with monitoring and are not completely accurate, for example: the left objects module can trigger alarms with changes in lighting, projected shadows, etc., generating what is called a false alarm.

 

In our example, a detection zone was created for the table as shown in the figure below:

 

 

Opening the left side options of Foreign Objects we have the following functionalities:

 

•Foreign Objects: Check this option to activate Foreign Objects in this zone.

•Rearm time: Rearm time for the alarm to be activated again in the Surveillance Client (if configured).

•Intersection with the zone: If false, only objects that have their center inside the zone will be fired. If true, any object intersecting the zone can trigger the alarm.

•Time: Time in seconds that the object must remain stationary in the zone for the alarm to be triggered. Long times are not recommended in places with a lot of movement.

•Alarm Actions: Click on the alarm actions line and then on the button with 3 dots as shown in the figure below:

 

 

On the alarms screen, configure the desired actions when the analytics trigger events. To learn more about alarm actions see chapter How to configure event actions .

 

Here is an example where the alarm was triggered in the previously configured situation:

 

 

Every time an alarm is triggered the scenario is automatically relearned.

 

To learn how to generate reports, consult the Surveillance Client manual.