VIVOTEK
User's Manual - 45
Measurement Window: This function allows user to set measurement window(s) for low light
compesation�
■ Full view: Calculate the full range of view and offer appropriate
light compesation�
■ Custom: This option allows you to manually add customized windows as inclusive or exclusive
regions� A total of 10 windows can be set� The inclusive window refers to “weighted window“; the
exclusive window refers to “ignored window“� It adopts the weighted averages method to calculate
the value�
■ 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 control:
■
Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark to
bright)�
■
Exposure mode (Auto): Select Auto to set a proper maximum exposure time (second) according
to the light source of the surroundings� You can set iris mode as "indoor" or "outdoor" to reach the
best image quality� You may also adjust iris sensitivity from 1 to 10�
■
Exposure mode (Manual): Select Manual to set a fixed exposure time and gain� Shorter
exposure times result in less light� Then, tune the slider bar to set the Exposure time and Gain
Control to the best image quality� High gain control value will generate a certain amount of noise�
Note that if you select Manual Exposure mode, the Iris adjustment and Iris speed slide bars will
appear, while the Iris sensitivity option will not be available�
■
Iris Adjustment: The camera comes with a P-iris lens, which controls the iris opening with
extreme precision by its built-in stepping motor� Via software controls, the lens maintains the iris
opening at an optimal level at all times, resulting in superior sharpness and depth of eld as well
as image quality�
You can manually tune the value of iris opening (aperture size), which can range from 1 to 100
X
X
Exclude
Include
Weighted region
Ignored region