Camera
41
VCA
You can choose between two VCA functions under
"Type". VCA (Video Content Analysis) enables object-
based detection of video content, providing greater
functionality than conventional motion detection.
VCA detection is activated if an object that corresponds
to the analysis parameters (direction or dwell time) is
detected.
Setting up Tripwire Detection
This function can be used to detect people, vehicles or
other moving objects that cross a virtual line. The lines
can be configured exclusively for one particular direction
or bidirectionally for both directions.
Select the camera channel to be processed under
"Camera".
Under Type, select "
Tripwire Detection
" and select
"Enabled" to configure the VCA analysis for the channel.
Define additional parameters under
Settings
as required.
Parameter
Setting
Line
Up to four lines can be defined
per camera. Create the lines
using [ICON] by determining a
start and an end point in the
preview image. Clear the lines
using the [ICON] button.
Direction
Direction detection for the
analysis function can be
determined here. The following
setting not possible:
A<->B
: Detection if an object
crosses the line from both
directions.
A->B:
Detection if an object
crosses the line from A to B.
B->A
: Detection if an object
crosses the line from B to A.
Sensitivity
Set the percentage here. The
higher the value set, the smaller
the objects detected (this can
lead to false alarms, however).
Setting up Intrusion Detection
This function can be used to detect people, vehicles or
other moving objects that remain in a particular image
area within a defined period.
Select the camera channel to be processed under
"Camera".
Under Type, select "
Intrusion Detection
" and select
"Enabled" to configure the VCA analysis for the channel.
Define additional parameters under
Settings
as required.
Parameter
Setting
Intrusion Region
Up to four Intrusion Regions can
be defined per camera. An
Intrusion Region can be
generated using [ICON] by
defining four points in the
preview image. Alternatively, the
complete screen area can be set
using the [ICON] button. Clear
the region using the [ICON]
button.
Sensitivity
Here, the sensitivity can be set
between 1
–100. The higher the
value set, the sooner objects are
detected.
Percentage
Defines what percentage of the
defined region must change to
detect an object. If the value is at
50, then 50% of the region must
continuously change to trigger an
alarm.
Dwell time
Defines how long (in seconds)
the object may remain in the
region until an alarm is signalled.
Trigger Channel
When you click on "Settings", the
Trigger Channel
tab
will appear.
Note
A maximum of two video channels can be
configured for VCA.
