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Chapter 5
Configuration
Note
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Exposure control:
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AE Speed Adjustment—This function applies when you need to monitor fast changing lighting
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conditions. For example, the camera may need to monitor a highway lane or entrance of a parking
area at night where cars passing by with their lights on can bring fast changes in light levels. The
same applies if the camera is installed on a vehicle, and when it needs to adapts to fast changes of
light when entering and leaving a tunnel.
WDR—Refers to the Wide Dynamic Range function that enables the camera to capture details in a
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high contrast environment. Use the check box to enable the function, and use the slide bar to select
the strength of the WDR Pro functionality, depending on the lighting condition at the installation
site. You can select a higher effect when the contrast is high (between the shaded area and the light
behind the objects).
The Exposure control setting in the Exposure window will be disabled when the WDR function
is enabled (system default).
The inclusive window refers to the "weighed window"; the exclusive window refers to "ignored
window". It adopts the weighed averages method to calculate the value. The inclusive windows
have a higher priority. You can overlap these windows, and, if you place an exclusive window
within a larger inclusive window, the exclusive part of the overlapped windows will be deducted
from the inclusive window. An exposure value will then be calculated out of the remaining of
the inclusive window.
BLC (Back Light Compensation): This option will automatically add a "weighted region" in the
middle of the window and give the necessary light compensation.
Exposure level—You can manually set the Exposure level, which ranges from –2.0 to +2.0 when
WDR pro is disabled and from +0.7 to –0.7 when WDR pro is enabled (dark to bright). You can
click and drag the semi-circular pointers on the Exposure time and Gain control slide bars to
specify a range of shutter time and Gain control values within which the camera can
automatically tune to an optimal imaging result. You may prefer a shorter shutter time to better
capture moving objects, while a faster shutter reduces light and needs to be compensated by
electrical brightness gains.
Exposure mode—You can click and drag the semi-circular pointers on the Exposure time and
Gain control slide bars to specify a range of shutter time and Gain control values within which
the camera can automatically tune to an optimal imaging result. You can also configure the iris
size to control the amount of light. For example, you may prefer a shorter shutter time to better
capture moving objects, while a faster shutter reduces light and needs to be compensated by
electrical brightness gains.
Flickerless—Under some circumstances when there is a difference between the video capture
frequency and local AC power frequency (NTSC or PAL), the mismatch causes color shifts or
flickering images. If the above mismatch occurs, select the Flickerless check box, and the range
of Exposure time (the shutter time) will be limited to a range in order to match the AC power
frequency. When selected, the exposure time will be forced to stay longer than 1/120 second.
For cameras that come with fixed iris lens, setting the exposure time to longer than 1/120 second
may introduce too much lights to the lens. You can use this option to observe whether the result
of long exposure time is satisfactory.
You can click and drag the semi-circular pointers on the Exposure time and Gain control slide
bars to specify a range of shutter time and Gain control values within which the camera can
automatically tune to an optimal imaging result. For example, you may prefer a shorter shutter
time to better capture moving objects, while a faster shutter reduces light and needs to be
compensated by electrical brightness gains.
Cisco Video Surveillance 8020/8030 IP Camera Reference Guide
Media > Image
5-11
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