User Manual (Ver.1.4) - Main Functions
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ALC (Automatic Level Control) Function
Related Setting Items:
The ALC (automatic level control) function combines the automatic gain control (AGC/Auto Gain
Control) and automatic exposure control (ASC/Auto Shutter Control) functions and is capable of
handling various changes in brightness. The function operates as follows in response to changes in
brightness.
Change from bright to dark: ASC → AGC
Change from dark to bright: AGC → ASC
To Use the ALC Function
Set GainAuto or ExposureAuto or both to
Continuous
mode. Configure the minimum value, maximum
value, etc. for AGC and ASC in AutoLevelControl.
The target video levels for AGC and ASC are configured in ALCReference. For example, when
ALCReference is set to 95%, video levels will be maintained at 95% using AGC and ASC.
In color models, the channel to be used as the reference for ALC control can be set.
l
ALCControlReference
: Set whether to specify the SelectedChannel refer to channel (R, G, B)
or PeakChannel refer to the channel with the highest average image level.
l
If ALCControlReference= SelectedChannel, set ALCControlChannel to
Red
,
Green
or
Blue
.
The speed of ALC control can be set from 1 to 100 (fastest) in ALCControlRatio.
Note:
If the ALCControlRatio setting is large, the ALC operation may cause hunting depending on
the AcquisitionFrameRate setting. In this case, lower the value of AcquisitionFrameRate or
ALCControlRatio.
