Vivotek FD8363 User Manual download pdf (Page 82)

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82 - 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.

■ Custom: This option allows you to manually add a specific window as a 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.

Include

Weighted region

Ignored region

Exclude x

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: When selected, a BLC window will appear on screen meaning that the center of the scene

will be taken as a weighed area. This option enables light compensation for images that are too

dark or too bright to recognize; for example, for the dark side of objects that is posed against

bright sunlight.

Exposure control:

■

Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark

to bright). You can click and drag the semi-circular pointers on the Exposure time and Gain

control slide bars to specify a range of shutter time and Gain control values within which the

camera can automatically tune to an optimal imaging result. You may prefer a shorter shutter

time to better capture moving objects, while a faster shutter reduces light and needs to be

compensated by electrical brightness gains.

■

Exposure mode: Select Auto or Fixed mode according to your needs.

Manual: Select Manual to set a fixed exposure time and gain. Then, tune the semi-circular

pointers to congure a range of values within which the system can uctuate and adapt to an

optimal result for the Exposure time and Gain Control. A shorter exposure time allows less

amount of light to enter the sensor; while a higher gain control value generates electronic gains

for dark areas and certain amount of noises.

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Vivotek FD8363 User Manual Page 82