ABUS TV3220 - Manual (Page 65)

ABUS VMS ABUS Security-Center GmbH & Co. KG
System manual
Version 7.3 65
3.2.8.3 Activating the adaptive mask
The adaptive mask prevents false alarms from being triggered when recording is made by
activity detection.
Possible examples of this are trees or flags moving in the wind.
As their movements remain constant, a mask
(similar to a permanent mask) is placed over this
area (does not apply to ABUS VMS Basic).
Recording through activity detection is then
ignored for this area.
The sensitivity of the adaptive mask can be set
between
“low” and “high”. The more sensitive the
mask setting, the bigger the adaptive mask.
Note:
The standard mask sensitivity setting is “normal”. Check whether or not this setting is suitable
for you, as the adaptive mask can sometimes lead to an unexpected loss of recording.
3.2.8.4 Configuring the sensitivity of activity detection
The activity detection system analyzes the entire video image for any changes. If these
changes exceed a set threshold, an alarm is triggered and recording is started.
In the mask dialog on the camera configuration screen of the system configuration, you can
not only create motion masks, but also adjust the activity detection threshold parameters. To
do this, you can use the Sensitivity and Object size sliders.
In this case, Sensitivity refers to the average brightness value with which altered pixels are
compared with the previous brightness. If the sensitivity is set very low, the change must differ
greatly from the previous value. If the sensitivity is set very high, even slight changes trigger
an alarm.
Object size is the area a change must cover. In this case: The smaller the object size, the
smaller the coherent area which triggers an alarm.