Vivotek IP8152 user manual Blc

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.

■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.

BLC

Exposure control:

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

■Exposure mode: (Available for IP8152 using a DC-iris lens) - Select Auto or Fixed mode according to your needs.

Auto: If you set Exposure mode as Auto, the Exposure time and Gain control will not be configurable since the sensor library will automatically adjust the value according to the ambient light. Then you can configure iris mode as “indoor” or “outdoor” to reach the best image quality.

Fixed: Select Fixed mode to set a fixed exposure time and gain. Then, tune the slide bar pointers to set the Exposure time 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.

■Flickerless: (for IP8152 using a fixed lens) 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 firmware can automatically adapt to. Note that Firmware will then automatically tune the Gain, Exposure time, and Iris opening within the ranges you specified. 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.

■Gain control: Tune the slider bar to set the Gain Control to the best image quality. Higher gain control value will generate a certain amount of noises, and that the gain control, lighting levels, and picture performance are closely related.

Click the Save button to preserve your configuration.

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