To create the Multiple objects detector, do the following:

  1. Create the required detector and specify its parameters (see Configuring detectors and their sub-detectors).
  2. Below the created detector, click Create… → Multiple objects.

By default, the detector is enabled and set to generate events when the number of objects in the detection area exceeds the value specified in the detector settings.

If necessary, you can change the detector parameters. The list of parameters is given in the table:

ParameterValueDescription
Other
EnableYesThe detector is enabled by default. To disable the detector, select the No value
No
NameMultiple objectsEnter the detector name or leave the default name
TypeMultiple objectsName of the detector type (non-editable field)
Basic settings
Maximum object height100

Specify the maximum object height as a percentage of the frame size for the detector to generate an event. The value must be in the range [0.05, 100]

The values of the maximum object height must be equal in the settings of the Object tracker and Multiple objects.

Maximum object speed500

Specify the maximum object speed per second for the detector to generate an event. The value must be in the range [0, 500]

  • In Axxon One, speed is a conditional value that is calculated using values of different dimensions. The speed calculation algorithm takes into account both the frame width and its height.
  • For a visual understanding of the speed values, we recommend specifying the speed when searching the archive (see Configuring minimum and maximum object speed).
Maximum object width100

Specify the maximum object width as a percentage of the frame size for the detector to generate an event. The value must be in the range [0.05, 100]

The values of the maximum object width must be equal in the settings of the Object tracker and Multiple objects.

Minimum object height0.1

Specify the minimum object height as a percentage of the frame size for the detector to generate an event. The value must be in the range [0.05, 100]

The values of the minimum object height must be equal in the settings of the Object tracker and Multiple objects.

Minimum object speed0

Specify the minimum object speed per second for the detector to generate an event. The value must be in the range [0, 500]

  • In Axxon One, speed is a conditional value that is calculated using values of different dimensions. The speed calculation algorithm takes into account both the frame width and its height.
  • For a visual understanding of the speed values, we recommend specifying the speed when searching the archive (see Configuring minimum and maximum object speed).
Minimum object width0.1

Specify the minimum object width as a percentage of the frame size for the detector to generate an event. The value must be in the range [0.05, 100]

The values of the minimum object width must be equal in the settings of the Object tracker and Multiple objects.

Number of alarm objects10

Specify the number of objects for the detector to generate an event. The value must be in the range [1, 100].
When the specified number of objects is exceeded, the detector generates the Triggering start event. When the number of objects becomes less than the specified value, the Triggering end event is generated

Object classAll classes

Select the object class that must generate an event. The default value is All classes

  • When you create the Multiple objects detector as a child object of the Object tracker and select the Person value, there won't be any events if the tracker detects the movement of several people nearby.
  • When you create the Multiple objects detector as a child object of the Category: Vehicle detectors, the Object class parameter must have the All classes value.
Vehicle
Person

By default, the entire frame is a detection area. If necessary, in the preview window, you can reduce the detection area (see Configuring a detection area) and/or set one or more skip areas (see Configuring a skip area).

  • For convenience of configuration, you can "freeze" the frame. Click the button. To cancel the action, click this button again.
  • The detection area is displayed by default. To hide it, click the button. To cancel the action, click this button again.

To save the parameters of the detector, click the Apply  button. To cancel the changes, click the Cancel  button.

Configuration of the Multiple objects detector is complete.