Vivotek SD8364E, M user manual Vivotek

VIVOTEK

Exposure control:

■Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark to bright). You can also select other values from the Exposure mode menus and select a preferred scenario or manually configure the associated settings. 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, Shutter Priority, Iris Priority, Quality Priority, or Manual mode according to your needs.

-Auto: System default, which automatically adjusts the iris, shutter speed, and gain for an optimmal exposure level.

-Shutter Priority: When selected, the Exposure time slide bar will appear, allowing you to select an exposure time ranging from 1/10,000, to 1/1 second. Once a fixed value is selected, system firmware will automatically tune the gain and iris settings to match an optimal exposure level.

-Iris Priority: When selected, the Iris adjustment slide bar will appear, allowing you to select an aperture size ranging from F14 to F1.6. Once a fixed value is selected, system firmware will automatically tune the gain and exposure time to match an optimal exposure level. The value is measured in the F-number as the ratio of the focal length to the lens diameter. Iris size is inversely proportional to the F-number; therefore, the smaller the F-number, the greater is the exposure ratio. Smaller F-number (larger exposure ratio, largest size of lens aperture opening) is shown on the right of the slide bar.

-Quality Priority: When selected, the embedded mapping table of aperture size and depth of field will apply when operating with the auto focus mechanism.

-Manual: Select Manual to set a fixed exposure time, iris, and gain. Then, tune the slide bar to set the

Exposure time, Iris adjustment, 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.

Note the following when the Manual mode is selected:

1.The Exposure level bar will not be available.

2.The IR cut filter setting will switch to Day Mode. If it was previously configured into other modes, the previous setting remains intact.

Manual: (Note that some of the Manual options will be disabled when WDR Pro is enabled!)

56 - User's Manual