AXIS Q6045-E Mk II PTZ Dome Network Camera
Detectors
Parameter
Object Size
History
Sensitivity
Description
Object size relative to window
size.
Object memory length.
Difference in luminance
between background and
object.
High level (100%)
Only very large objects trigger
motion detection.
An object that appears in
the window triggers motion
detection for a long time
before it is considered as
non-moving.
Ordinary colored objects on
ordinary backgrounds trigger
motion detection.
Medium level (50%)
A large difference in luminance
is required to trigger motion
detection.
Low level (0%)
Even very small objects trigger
motion detection.
An object that appears in
the window triggers motion
detection only for a very short
time before it is considered as
non-moving.
Only very bright objects on
a dark background trigger
motion detection.
Recommended values
5–15%
60–90%
75–95%
Default values
15%
90%
90%
Note
• To trigger on small objects or movements, use several small motion detection windows rather than one large window
and select a low object size.
• To avoid triggering on small objects, select a high object size.
• While monitoring an area where moving objects are not expected, select a high history level. This will cause motion
detection to trigger as long as the object is present in the window.
• To only detect flashing light, select a low sensitivity. In other cases high sensitivity is recommended.
Basic Video Analytics
The
Basic Video Analytics
section include the following detectors:
•
Object Removed
, see
page 32
•
Enter/Exit Detector
, see
page 33
•
Fence Detector
, see
page 34
•
Object Counter
, see
page 34
Important
• To activate a detector, the saved preset must be selected in the drop-down list. The detector will only be enabled at the
preset, see
Preset Positions on page 25
. Note that the
Area of interest
and
Object size
are not visible in
Preset Positions
,
only under the
Detectors
menu. If the pan/tilt/zoom position is changed, the detector is disabled.
• The detector will
not
register an object if the speed of the object is too high, if the object is too close to the camera, if the
difference in luminance between the object and the background is insufficient, or if the camera is autofocusing.
Object Removed
Object Removed
is used to trigger an alarm if a detected object within a pre-defined area of interest has disappeared. Do the
following to set the detector:
Note
Use the
Drawing Opacity
slidebar to define how transparent the area of interest or object size shape should be. Note
that this change will not be saved.
32