The Automatic Level Control (ALC) function combines the Automatic Gain Control (AGC) and Automatic Shutter Control (ASC) functions to handle deviations in brightness.
The following graphic displays how Automatic Level Control operates in response to brightness deviations:
To change from bright to dark: ASC → AGC
To change from dark to bright: AGC → ASC
Automatic Level Control
To use the ALC function:
Set
GainAuto
or
ExposureAuto
to
Continuous
.
Configure the minimum and maximum values for AGC and ASC under
ZebraCustomControlALC
.
Configure the target video levels for AGC and ASC in
ALCReference
. For example, when
ALCReference
is set to 95%, video levels are maintained at 95% using AGC and ASC.
In color models, set a channel to serve as a reference for the ALC using
ALCControlReference
. Next, select whether to specify the
SelectedChannel
to channel (R, G, B) or
PeakChannel
to the channel with the highest average image level.
If
ALCControlReference
is equal to
SelectedChannel
, set
ALCControlChannel
to
Red
,
Green
, or
Blue
.
Set the speed of ALC control from 1 to 100 (fastest) in
ALCControlRatio
.
If the
ALCControlRatio
setting is large, the ALC operation may cause hunting depending on the
