Ganz PIXELPRO SERIES, Interface Manual

Page: 108 / 111

Printed Documentation
100
In this case, an alarm is not raised when the person enters the zone for the second time,
because the time between the occurrence of the last alarm of the same type for the object is
less than the Alarm Holdoff Time. When the person re-enters the zone for a third time, the
elapsed time since the previous alarm of the same type for that object is greater than the
Alarm Holdoff time and a new alarm is generated.
In essence, the Alarm Holdoff Time can be configured to prevent multiple alarms being
generated because an object is loitering on the edge of a zone. Without Alarm Holdoff Time
configured, this scenario would cause so-called "Alarm chatter".
The default setting for Alarm Holdoff Time is 5 seconds.
Measurement Units
Allows the measurements units to be switched between Metric and Imperial formats. For
more information, please refer to the
Measurement Units topic.
Metadata Format
The metadata stream contains a complete description of every moving and stationary target,
as well as additional diagnostic data to enable troubleshooting and optimum configuration.
In order to save network bandwidth, the default metadata stream does not include a lot of
the diagnostic data. The specific contents of the metadata stream can be configured with
this control.
The metadata stream can contain any selection of the following sub-streams:
Event
Contains information about events (alarms) raised due to objects triggering detection rules.
Object
Contains detailed information about each and every object tracked by the VCA engine
including bounding box, object trail and object properties.
Counting