User manual

30
AXIS Q7404 - Events
Camera Tampering
The camera tampering application generates an alarm whenever the camera is repositioned, or when the lens is covered,
sprayed, or severely defocused.
For the video encoder to send an alarm you must create a triggered event, see How to set up a triggered event, on page 28.
Settings
The Minimum duration parameter sets the minimum tampering period, that is an alarm will not be triggered until this period
has elapsed, even if the tampering conditions are otherwise met. This can help prevent false alarms for known conditions that
affect the image.
If the camera lens is sprayed or covered so that the camera live view becomes dark, it will not be possible to distinguish this
situation from other situations where the same effect is seen, such as when lighting conditions change.
When the Alarm for dark images parameter is enabled, alarms are generated for all cases where the lights are either dimmed
or turned off, or if the lens is sprayed, covered, or rendered severely out of focus. If not enabled, no alarm will be sent.
After you define these settings, click Save.
Motion Detection
Motion detection is used to generate an alarm whenever movement occurs (or stops) in the video image. A total of 10 Include
and/or Exclude windows can be configured.
• Included windows target specific areas within the video image.
• Excluded windows define areas within an Include window that should be ignored (areas outside Include windows are
automatically ignored).
Once configured, the motion detection windows appear in the list of available triggers, for triggering events. See How to set up
a triggered event, on page 28.
Notes:
Using the motion detection feature may decrease the video encoder’s overall performance.