Manual
VIVOTEK
User's Manual - 51
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 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 9 inclusive and exclusive windows can be created for a view� You can create Exclude
windows for the camera to ignore the lighting condition of certain areas�
Note that the title pane of the Include/Exclude windows is not included into the calculation� The
inclusive and exclusive windows can be placed one on top of another� The inclusive windows
have a higher priority� You can overlap these windows, and, if you place an exclusive window
within a larger inclusive window, the exclusive part of the overlapped windows will be deducted
from the inclusive window�
■ 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 rmware
can automatically adapt to� Note that Firmware will then automatically tune the Gain, Exposure
time, and Iris opening within the ranges you specied. 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�
BLC