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Enhancing Video for Security
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camera at close range and blinding the camera is not considered sabotage unless that person
remains in front of the camera for more than 48 seconds.
Event log
To search the event log, use an Event session. See
Event Session: to Search the Log of Events, p. 193.
Moved-type CSD: Learning and Rearming Alarms
Good Image
A "Good Image" is reported, to the left of Reset, when a scene has enough features for the unit to
detect if someone or something has moved the camera, and sabotage can be inferred. A "Bad
Image" is reported when the image is indistinct, for example, if the camera is pointed at a wall of
uniform color.
From Learning to Running
When Moved is selected, or its threshold changed, the Multi-Media unit "learns about" the scene
shown by the camera; "Learning" is reported, to the left of Moved, for 2 minutes to a maximum of
3 minutes. Do not blind or blur a camera while "Learning" is displayed. When learning ends,
"Running" is displayed to the left of Moved.
Resetting learning
Reset is enabled when Moved is selected. Clicking Reset starts Learning again, and should be
used whenever the camera is moved intentionally to show another scene, or if the scene's lighting
or content changes dramatically. Reset has no effect on Blind and Blur.
Rows of mobile objects
Moved is sensitive to large scale changes in a scene. For example, using Moved for a camera that
shows many chairs in a row, close by, such as in an airport or casino, may not be effective.
Clicking Reset while people are sitting makes the unit "learn" that sitting persons are not to be
considered as sabotage. When the chairs empty, the scene may have changed enough for the
unit to trigger a log entry or an alarm. And if the operator makes the unit "learn" when the chairs
are empty, then CSD may be triggered when people sit in the chairs. The same can be said for a
row of vehicles that are frequently moved, such as in a taxi stand or truck depot.
Alarms
After rearming an alarm produced by the Moved-type sabotage detection, move the camera back
to the scene that you need to monitor, and click Reset.
Computing the Length of the Video Archive
Storage Process: Video, Audio, Data
Recordings of video, audio and data are not permanent. When a unit's storage fills, the oldest
recorded video, audio and data are replaced with more recent recordings. The amount of time that
recordings are available is known as the length of the video archive.