Dahua 3000 Series User Manual

Dahua 3000 Series User Manual Manual pdf 42 page image

Main Function Description 42Parameter ExplanationLineDebouncerTimeAbsWhen IO line is selected to be the input, you can set the debouncertime.A pulse less than the set value will not be considered as a validtrigger input.5.5 AnalogControlIn this property, you can adjust the acquired analog signals, including gain , black balance, whitebalance and gamma correction etc., as shown in Figure 5-5; please refer to Sheet 5-6 for detailedparameter settings.Figure 5-5 Analog ControlSheet 5-6 Analog Control - Parameter ExplanationParameter ExplanationGainSelector The channel gain is not supported to set, the default is All.GainRawThe larger the gain, the brighter the image. The set range is different fordifferent types and the default value is 1.The analog gain is preferentially enabled.BlackLevelSelector BlackLevelSelector is used to select the black balance channel.BlackLevel is used to eliminate the impact of Sensor’s dark current. The darkcurrent is a phenomenon that the image brightness is a value greater than 0when it is all black. By modifying the black level value, the brightness of thechannel can be more responsive to the actual image brightness. The settingrange is 0 ~ 255. When BlackLevelAuto is set as Off, the fixed black level that thealgorithm minus is 1/4 of the value set in BlackLevel. When BlackLevelAuto is set as Once, it will automatically setBlackLevel for once according to the return value of sensor. Then it willBlackLevelBlackLevelAuto