Vivotek FD8152V User Manual download pdf (Page 51)

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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 specied. 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

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Vivotek FD8152V User Manual Page 51