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False Triggers
Setting the motion detection at high sensitivity levels increases
the frequency of false alarms. On the other hand, low sensitivity
levels increase the risk that a significant motion event (such as
an intruder) will not trigger the motion detection to record.
Check the Motion Detection settings both during the day
and at night. In low-light conditions (or when your cameras
are using infrared night vision) the DVR may be more or less
sensitive to motion, depending on your unique circumstances.
The difference might be very dramatic!
Weather
The weather conditions are going to affect your motion detection.
Dramatic weather phenomenon such as heavy rain, strong
winds, lightning and so on, may trigger the motion detection
with surprising frequency.
On the other hand, things like fog, mist and other obscuring
kinds of weather might mask or obscure something moving to
the point that the DVR fails to detect them.
•
Limit the motion sensitive area to only the areas in view
that a target could be. In particular, large featureless
areas in the camera's view are the ones most likely to
give false triggers - turning off the motion sensitivity
to any area a target cannot move in front of will help
reduce false triggers - see page 30.
Note: The motion detection feature will seem more sensitive
at night. We recommend that you test your motion detection
sensitivity both during the day and at night to ensure your
sensitivity setting is suitable for either lighting condition.
Some tips to customizing your motion detection
sensitivity and actions:
•
Consider how important it is to be notified of motion
events as they happen.
Using the email alerts is a great way to be kept up-to-speed
on what's happening, but may quickly become annoying if
something occurs which will generate a number of false triggers.
As a rule, we suggest employing the email alert only on interior
cameras during times that no one should be moving about in
front of them.
•
It can be important to have a complete record of a
subject's movements and actions for legal reasons.
If your cameras capture an illegal event (typically an intruder,
but we're continually surprised by stories from our users) it is
important to have as much information as possible. For example,
images of someone in your home may not actually prove that
they broke in - but footage of them breaking a window does. If
you use a camera inside the home to trigger all exterior cameras
with pre-record enabled, then you will have a record of how they
entered in addition to what they did.
•
Always consider what's really important.
Camera Management: Motion (ctd)
Which is the bigger problem - a dozen false triggers per day, or
missing one critical event?
There's no magic setting which will make motion detection work
perfectly. There will always be some events that it's not sensitive
enough to catch, or minor happenings that will trigger an overly
sensitive camera to record. Typically, the best motion detection
settings are one's that give few false triggers but don't miss
anything.
Even motion detection which false triggers a few times per hour
will still save a significant amount of hard drive space compared
with a constant recording schedule for the same duration.
You can also use the Privacy Mask option to minimize false
triggers by obscuring different parts of your image - see page 31.
How it Works: Once motion detection has been enabled for
a channel, it will register to the DVR as a Motion Event. Thus,
you can use the Motion recording mode in the schedule to
trigger the DVR to record when motion detection triggers an
alarm signal.
Enable Motion Detection: Whether or not motion detection
is enabled on a specific channel. Each channel can be
configured independently of one another.
Say, for example, you are trying to monitor your front yard,
whilst in the background there is a busy street, and the cars
driving past continually set off the motion detection. What
can you do about it? Setting only part of the camera's view
to be motion sensitive might be the answer. This is useful in a
number of circumstances, such as monitoring one particular
door at the end of a busy hallway, or a backyard with a tree
that keeps blowing in the wind.
Handling: Here you can define what will happen when the
camera you've selected detects motion. You can trigger
additional cameras to start recording, you can adjust your
arming schedule, send alerts to the SwannView Plus software
or to email or trigger the alarm output.
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