
VideoJet X20 | Configuration Using a Web Browser en 67 |
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You can set delayed alarm triggering. The alarm is only triggered after a set time interval in seconds has elapsed and then only if the triggering condition still exists. If the original condition has been restored before this time interval elapses, the alarm is not triggered. This allows you to avoid false alarms triggered by
You can set how large the global change in the video image must be for an alarm to be triggered. This setting is independent of the sensor fields selected under Select area. Set a high value if fewer sensor fields need to change to trigger an alarm. With a low value, it is necessary for changes to occur simultaneously in a large number of sensor fields to trigger an alarm.
This option allows you to detect, independently of motion alarms, manipulation of the orientation or location of a camera resulting from turning the camera mount bracket, for instance.
5.23.11Scene too brightActivate this function if tampering associated with exposure to extreme light (for instance, shining a flashlight directly on the lens) should trigger an alarm. The average brightness of the scene provides a basis for recognition.
5.23.12Scene too darkActivate this function if tampering associated with covering the lens (for instance, by spraying paint on it) should trigger an alarm. The average brightness of the scene provides a basis for recognition.
5.23.13Scene too noisyActivate this function if tampering associated with EMC interference (noisy scene as the result of a strong interference signal in the vicinity of the video lines), as an example, should trigger an alarm.
5.23.14Global changeActivate this function if the global change, as set with the Global change slide control, should trigger an alarm.
5.23.15Reference checkYou can save a reference image that is continuously compared with the current video image. If the current video image in the marked areas differs from the reference image, an alarm is triggered. This allows you to detect tampering that would otherwise not be detected, for example if the camera is turned.
1.Click Reference to save the currently visible video image as a reference.
2.Click Select area and select the areas in the reference image that are to be monitored.
3.Check the Reference check box to activate
Bosch Security Systems | Installation and Operating Manual | V3.5 2007.12 |