VIVOTEK
46 - User's Manual
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 0 to 8 (dark to
bright)�
■ Flickless: 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: The Exposure time allows tuning for more or less light to enter the lens. The
configurable value ranges from 1/32000 to 1/5 of a second. An optimum shutter speed should be
maintained as long as the light level of the scene permits�
■ 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 noise, and that the gain control, lighting levels,
and picture performance are closely related�
Note that 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� Firmware will then automatically tune the Gain, Exposure time, and Iris
opening within the ranges you specified.
BLC
