Axis 2120 User Manual page 32

Configuring Your Camera
32
Creating a Motion Detection Window
Follow the instructions below to create a motion detection window within the image area:
1. Click the New button to open a standard-sized window; or click and drag the mouse from
within the image area to create a motion detection window of any size.
2. Drag and drop the new window to any area you wish to monitor. By dragging the
bottom-right corner of the window you can also resize the motion detection window, if
desired.
3. A Name field, complete with the respective Size, History, and Sensitivity profile sliders are now
displayed for the new motion detection window you have created. In the Name field, enter a
suitable name for the motion detection window, and set the Size, History, and Sensitivity
profile sliders accordingly for your image area. A full description of each profile slider is
provided in the table below:
Profile Slider Parameter Description
Size
History
Sensitivity
4. Click the Save button to register the motion detection window settings. The Motion Indicator
is now active, displaying the current motion level with the threshold value for alarm settings
represented by a black colored delimiter bar.
5. Having saved a new motion detection window, any detected motion is then displayed within
the Motion Indicator. However, an alarm is only generated if the motion exceeds the tolerance
defined by the delimiter bar. The Motion Indicator displays red whenever enough motion
occurs to trigger an alarm.
Defines how large a moving object must be to trigger the motion detection - relative to the size
of the defined motion detection window. For example; when monitoring a landscape, setting the
size parameter to small might possibly trigger the motion detection each time a bird flies through
the motion detection window.
The 'size' profile slider is used to determine the minimum size of the triggering object within the
motion detection window.
Defines the elapsed time duration between the comparable reference and the current images; i.e.
should your AXIS 2120 compare the latest image with the one taken previously (Low level), or
against one taken over an hour ago (High level)?
A High level setting causes the reference image to be updated very infrequently; consequently,
any significant change in the target image will initiate an alarm that is active for a long period of
time. A Low level setting causes the reference image to be updated very frequently;
consequently, any significant object in the target image area will be active for only a very short
period, before being seen as identical to the updated reference image.
This parameter is useful for 24 hour monitoring when night turns to day, and other occasions
when you want slight deviations in the motion detection window area to be tolerated without
initiating alarms.
Defines how subtle the change of color, or nuance, needs to be before a motion detection alarm
is triggered.
Ordinary colored objects on ordinary backgrounds trigger the motion detection when this
parameter is set to High level. When set to a Low level, only very bright objects on a dark
background will trigger the motion detection.
AXIS 2120 User's Manual