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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
Change in brightness
Dark
Bright
AGC operation
ASC (auto shutter)
operation
AGC
Max
AGC operation
Max. to min. (user specified)
Fixed at min. gain value
ASC operation
Max. to min. (user specified)
Fixed at min. ASC value
Fixed at max. ASC value
Operation during change
from dark to bright
Operation during change
from bright to dark
■
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].
Go-X Series GigE Vision I/F
Summary of Contents for Go-X Series
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