Xtralis ADPRO Presidium, Installation And User Manual

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ADPRO Presidium by Xtralis Installation and User Manual
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4. Dead Zones
The dead 'zone' is the area under the camera that the camera cannot view and should be
considered during system design. The following figure shows the dead zone area.
Figure 4: Camera Dead Zone
Camera positioning should be such that the 'dead zone' of one camera is covered by another
camera's field of view. The area just in front of the 'dead zone' can also be vulnerable to fast
moving targets. It is a good practice to ensure that the field of view of the camera covering the
'dead zone' includes the 'dead zone' plus an extra 10% to 15% of the area adjacent to the 'dead
zone'. The following diagram shows the camera's FOV and 'dead zone' in both perimeter and
area protection scenarios.
Figure 5: Camera Dead Zone Coverage
5. Optimal Camera Angle
Figure 4, which shows the 'dead zone' of a single camera, also shows the optimal camera angle.
The target closest to the camera should have its feet at the base of the camera FOV, and the
head of the target at the furthest detection distance should be just below the top of the FOV of
the camera.
Normal video monitors do not show the full horizontal video available. Presidium uses all of the
horizontal video for detection. Hence when aligning cameras, it is important to take this into
account, and if normal monitors are to be used (as opposed to underscanning monitors), then
care must be taken to mask out the extreme left and right hand edges of the image using the
detection area selection capability of Presidium.