VIVOTEK
User's Manual - 49
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)�
■
Exposure mode
: (Available for IP8152 using a
DC-iris lens
) - Select
Auto
or
Fixed
mode
according to your needs�
Auto
: If you set Exposure mode as
Auto
, the Exposure time and Gain control will not be
configurable since the sensor library will automatically adjust the value according to the ambient
light. Then you can configure iris mode as “indoor” or “outdoor” to reach the best image quality.
Fixed
: Select
Fixed
mode to set a fixed exposure time and gain� Then, tune the slide bar
pointers 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�
■ Flickerless: (for IP8152 using a
fixed lens
) 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.
BLC
