The Tailgating node analyses line crossings from a prior Line crossing node to detect tailgating events.
Inputs & Outputs
Inputs: 1, Media Format: Raw Video
Outputs: 1, Media Format: Raw Video
Output Metadata: Tailgating Metadata
Properties
Property
Description
Type
Default
Required
object_types
Comma-separated list of object types to consider. Empty list processes all objects. ex. car,person,face.mask
model-label
person
No
line_id
Line ID from a preceding Line or MultiLine node to monitor for tailgating. ex. front_entrance or front_entrance+vestibule
string
null
Yes
tailgating_rule
Tailgating rule. Options: interval, trigger. interval requires a minimum interval between objects crossing the line. trigger requires an external trigger (such as badge swipe) before each object that crosses the line.
enum
interval
Yes
tailgating_interval
Minimum time between objects crossing the specified line to be considered valid. A tailgating event will be triggered for objects that cross within a smaller interval. Conditional on tailgating_rule set to interval.
number
5
Yes
correlating_trigger
If specified, each object that crosses must be preceded by a trigger event that satisfies this condition. If not, a tailgating event will be triggered. Conditional on tailgating_rule set to trigger.
trigger-condition
null
Yes
correlating_trigger_buffer
Each correlating trigger will be matched with an object crossing within this interval. After the interval elapses, the trigger will be discarded. Conditional on tailgating_rule set to trigger.
number
5
Yes
crossing_allowance
Number of objects allowed to cross per interval or trigger.
number
1
Yes
display
Display mode. Options: none, basic, full. none does not display anything. basic highlights violating objects. full displays stats and highlights violating objects.
