Vivotek FD8151V User Manual page 50

VIVOTEK
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�
■ BLC (Back Light Compensation): This option allows you to use the center of the current view
as the measuring area� The measuring window refers to "weighted window" where the lighting
condition within the particular area is taken into account� Camera firmware then adopts the
weighted averages method to calculate the value and provides 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)�
■ Flickerless: This function helps avoid the flickering on images because of the fast shutter
movement� When selected, the exposure time will be forced to stay longer than 1/120 second�
■ Exposure time: you can split the round pointers on the Exposure time and Gain control slide
bars into two halves and drag them on the bars to designate a range of values in which firmware
can automatically adapt to� Note that Firmware will then automatically tune the Gain, Exposure
time, and Iris opening within the ranges you specified. For example, in low-light condition, you
may prefer a longer exposure time and more electronic gains� However, the noises in the image
will also increase�
■ Gain control: Tune the slider bar to set the Gain Control to the best image quality� Higher gain
control value will generate a certain amount of noises, and that the gain control, lighting levels,
and picture performance are closely related�
Click the Save button to preserve your configuration.
50 - User's Manual
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