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VIVOTEK
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. The Exclude window tells the firmware to ignore the lighting condition of a specific area. Camera firmware then adopts the weighted averages method to calculate the value. You can create up to 10 inclusive windows.
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■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
■Flickerless: This function helps avoid the flickering on images because of the fast shutter movement and the inconsistency between power line frequency (50 or 60Hz) and exposure time. When selected, the exposure time will be forced to stay longer than 1/120 second. For cameras that come with fixed iris lens, setting the exposure time to longer than 1/120 second may introduce too much lights to the lens. Users can use this option to observe whether the result of a long exposure time is satisfactory.
User's Manual - 51