User guide

Chapter 6 Configuring the Sender
VideoJet 10 63
Local sensitivity
The basic sensitivity of the video sensor can be adjusted for the environmental
conditions to which the camera is subject.
The sensor reacts to variations in the brightness of the video image. The darker
the observation area, the higher the value that must be selected.
– Adjust the sensitivity by dragging the scroll thumb to the desired setting.
Average (n frames)
You can define the number of frames for which a movement is monitored before
generating an alarm. This helps prevent false alarms from events such as a bird
flying across the surveillance area.
– Select the value by dragging the scroll thumb to the desired position.
Object min size (n*n blocks)
You can specify the number of sensor fields that a moving object must cover to
generate an alarm. This is to prevent objects that are too small from triggering an
alarm.
A minimum value of 2 (2 × 2 sensor fields) is recommended.
– Select the value by dragging the scroll thumb to the desired position.
Motion indicator
To prevent false alarms, a threshold can be applied to the motion signal. This
allows effects such as the background noise from the camera itself to be filtered
out.
The blue line in the illustration represents the alarm threshold. Any value above
this level will trigger an alarm. The parts of the motion signal line which will cause
an alarm are shown in red. The alarm threshold can be set higher or lower to suit
your needs.
– Observe the amplitude of the displayed movement signal over a longer period
of time under all the lighting conditions that may be encountered.
– Move the pointer over the blue line.
– Press the left mouse button in and drag the line to the desired level.