Measurement Window; Exposure Control; Exposure Mode - Vivotek SC8131 User Manual

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Measurement Window: This function allows users to configure measurement window(s) for low
light compensation. For example, where low-light objects are posed against an extremely bright
background, you may want to exclude the bright sunlight shining through a building's corridor.
■ Full view: Calculate the full range of view and offer appropriate light compensation.
■ Custom: This option allows you to manually add specific windows as measuring areas. The
measuring window refers to "weighed window" where the lighting condition within the particular
area is taken into account. Camera firmware then adopts the weighed averages method to
calculate the value.
A total of 10 inclusive windows can be
created for a view.
Note that the title pane of the Include
w i n d o w i s n o t i n c l u d e d i n t o t h e
calculation.
■ BLC: When selected, a BLC window
will appear on screen meaning that the
center of the scene will be taken as
a weighed area. This option enables
light compensation for images that are
too dark or too bright to recognize; for
example, for the dark side of objects
that is posed against bright sunlight.

Exposure control:

■ Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark
to bright). You can click 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:

Fixed: Select Fixed to configure a fixed exposure time and gain. Then, tune the slide bar to set
the Exposure time and Gain Control to the best image quality. A shorter exposure time allows less
amount of light to enter the sensor; while a higher gain control value generates certain amount of
noises.
Auto: If you set Exposure mode as Auto, the Exposure time and Gain control will not be
154 - User's Manual
Select Auto or Fixed iris mode according to your needs.
Exclude
Exclude
Include
Include
x
x