ATV NVW4212M, Руководство пользователя, Страница: 44 / 88

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amount of
noise in
image large amounts of noise,
which can have an
undesirable effect on
the image analysis
because unwanted
objects are detected in
the image or unwanted
events occur. noise, reducing
the sensitivity will
only detect visible
objects. in the image and still
detect the object in the
scene.
NOTE: A malfunction may occur under the following conditions.
-
Dark environment.
-
Changes in brightness due to lighting variations or clouds.
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When a moving object or facility is engaged or overlapped.
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When directing the camera to a light source (e.g. cars in a tunnel, trains).
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When a shadow occurs.
-
When trees and plants are shaking in the wind (If possible, install the camera in a location free
of trees and other plants. If it is inevitable, specify the area as Exclusive Area.).
-
Changes of fountain.
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An environment where reflections occur, such as rivers, lakes, glass, windows, mirrors, etc. (If
possible, install the camera in a location where there are no reflective objects. If it is inevitable,
specify the area as Exclusive Area).
-
If the object size is less than 5% or more than 40% on the screen.
-
When the brightness changes due to AGC or IRIS operation of the camera.
-
When an object with a minor difference from its background and brightness moves.
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Bad weather conditions such as typhoon, snow, rain.
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If the object size changes significantly due to movement toward the camera.
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When passing behind an object such as a tree.
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When the movement is feeble.
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When moving at high speed.
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If there are too many moving objects, it is difficult to create a background (for example, a
subway platform at commute time).
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When the image is shaken due to camera shake.
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When there is a flashing light in the shooting area.
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If the camera lens is not clear or out of focus.
•
Detection Rule: Set VA Event.
-
Select Event in the Select box (default: None). When Event is selected, a menu for setting
Rule Name and Event will be displayed. Users can set Event in Video Preview with on/off
toggle switch.
NOTE: The number of Detection Rule differs depending on License Type.
-
Standard Type: 3
-
Advanced Type: 8
•
How to set up
-
Line Detector:
1. Click the None menu to change into Line Detector.