setup screen
56_
setup screen
tampering detection
You can set to detect tampering attempts and trigger events, such as sudden change of camera’s framing
direction, blocked lens and other overall change of scenes from the video.
1.
From the Setup menu, select the <
event ( )
> tab.
2.
Click <
tampering detection
>.
3.
Set whether or not to <
enable
>.
4.
Set the tampering detection sensitivity. The higher the
sensitivity, detects the minutest tampering attempts.
5.
Specify the activation time and activation condition.
`
For more information about <
Activation time
> and <
Action
>, refer to
“
Alarm input
”. (page 55)
6.
When done, click [
apply (
)
].
J
`
The default tampering detection function may not work properly in
the following cases:
-
Under circumstances of simple background or low illumination and night time may lower the detection sensitivity.
-
A severe shaking of the camera or a drastic change to the illumination can be considered a tampering by mistake.
-
Detection of the tampering may take some time (maximum 5 seconds) right after the tampering was made.
-
Once a tampering is detected, the camera will resume a normal operating after a certain stability time (approx. 5 seconds)
during which no detection will be performed.
`
If false alarms are generated frequently, decrease the sensitivity gradually to minimize false alarms.
If you choose a lower sensitivity, only a sudden tempering is detected.
`
If you use a higher sensitivity, alarms may be generated even from very small changes, but false detection in response to
changes in an object or brightness may occur.
Defocus detection
You can configure settings to generate an alarm signal when a defocus of the camera lens is detected.
1.
From the Setup menu, select the <
event ( )
> tab.
2.
Click <
Defocus detection
>.
3.
Set whether or not to <
enable
>.
4.
Set the sensitivity.
The higher the sensitivity value is, the finer defocus can be
detected.
5.
Specify the activation time and activation condition.
`
For more information about <
Activation time
> and <
Action
>, refer to
“
Alarm input
”. (page 55)
6.
When done, click [
apply (
)
].
J
`
It may take a certain length of time (up to 5 seconds) to detect the defocus after a defocus situation occurs.
`
In the following cases, the defocus detection performance may be impaired or a malfunction may occur.
-
Monotonous monitoring environment, night or low illumination environment
-
Sudden changes in the illumination (e.g. indoor light shutting off)
-
Lens blocked by a large object that covers almost all of the screen
-
Changes the focus object by changing the camera position.
motion detection
You can configure settings to generate an event signal when a motion detection event is generated.
1.
From the Setup menu, select the <
event ( )
> tab.
2.
Click <
motion detection
>.
3.
Enable the motion detection mode.
4.
Set <
Sensitivity
>, <
Size
> and <
area
>.
5.
Specify the activation time and activation condition.
`
For more information about <
Activation time
> and <
Action
>, refer to
“
Alarm input
”. (page 55)
6.
When done, click [
apply (
)
].
