Alc (Automatic Level Control) Function - JAI GOX-2402M-PGE User Manual

ALC (Automatic Level Control) Function

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
AGC operation
ASC (auto shutter)
operation
■ 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 under [JAICustomControlALC].
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.
・[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.
・if [ALCControlReference]= [SelectedChannel] set [ALCControlChannel] to [Red],
[Green] or [Blue]
The speed of ALC control can be set from 1 to 100(fastest) in [ALC Control Ratio].
* 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].
Change in brightness
Dark
AGC
AGC operation
Max
Max. to min. (user specified)
ASC operation
Fixed at max. ASC value
Max. to min. (user specified)
Operation during change
from dark to bright
Bright
Fixed at min. gain value
Fixed at min. ASC value
Operation during change
from bright to dark
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Go-X Series GigE Vision I/F