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X Series DSP Cameras
Installation Instructions
FUNCTION SWITCHES
The overlay window will automatically disappear 5 seconds after the last dip switch setting is
made. Any parts of the scene that are not covered by the BLC window will be ignored when
determining the overall scene exposure.
Back Light Compensation feature - Example 1.
People entering a shop through a brightly lit doorway are to be monitored. Without backlight
compensation, a person entering the shop would be seen in silhouette because the relatively
bright background would cause the camera to reduce its exposure.
By using the backlight compensation feature, it is possible to select a window around the area
of interest, i.e. the doorway. Choosing window
A
, will ensure that the camera exposure
system only uses the central area of the scene to calculate the scene exposure. Therefore a
person entering the shop will be clearly displayed.
Back Light Compensation feature - Example 2.
The camera is required to observe a typical street scene. The sky above the buildings in the
street is very bright causing the cameras exposure system to overcompensate. Using the
backlight compensation feature to select window
C
ensures that the relative brightness of the
sky in the scene doesnt adversely affect the exposure. The buildings and street will be
correctly exposed.
Flickerless
The Flickerless setting can reduce the flicker caused by certain lighting conditions. Choose
between
ON
or
OFF
. The default setting is
OFF
. Switch SW2-1 must be up. Note that the
Electronic Iris setting must be off for correct operation of the Flickerless function.
Peak White Inversion (PWI)
Excessively bright or peak white areas in a scene can cause auto-iris lenses (Direct Drive and
Video Drive types) to react and close down thereby losing the detail in darker areas of the
scene. The Peak White Inversion feature is designed to overcome this. It allows you to render
any part of the scene over a certain brightness threshold as black.
A typical usage of this may occur in a highway surveillance role. Car headlamps would
normally cause an auto-iris lens to close. By using peak white inversion to render the headlamps
as black, the lens will not react to them and therefore correctly expose the rest of the scene.
SW1
SW2
SW3
1
1
1
2
2
2
3
3
3
4
4
4
5
6
FLICKERLESS ON
FLICKERLESS OFF
1 4
SW1
SW2
SW3
1
1
1
2
2
2
3
3
3
4
4
4
5
6
PKW ON
PKW OFF
4
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