Alc - IAI GO-5000M-USB User Manual

Note: If defective pixels are found consecutively in the horizontal direction, the blemish
compensation circuit does not work.
9.7

ALC

In the GO-5000-USB, auto gain and auto exposure can be combined to provide a wide ranging
automatic exposure control from dark to bright or vice versa.
The functions are applied in the sequence shown below and if one function is disabled, the
remaining function will work independently.
If the lighting condition is changed from bright to dark
If the lighting condition is changed from dark to bright
AGC works:
Auto shutter works:
ALC Reference will determine the target video level for AGC and Auto Shutter. For
instance, if ALC Reference is set to 100% video level, AGC and Auto Shutter will function to
maintain 100% video level.
 Please note that ALC function is available only in continuous mode, as well as RCT
mode.
GO-5000M-USB / GO-5000C-USB
B/W
Color
Fig.37 Blemish compensation
Dark
AGC AGC operation
Max Max ～ Min (User set)
Auto Shutter
Max
Operation if light changes
from dark to bright
Fig.38
Light changes
Gain is fixed at Min.
Auto shutter operation
Max ～ Min (User set)
Operation if light changes
from bright to dark
ALC function concept
- 57 -
Defective Pixel
ASC ― AGC
AGC ― ASC
Bright
Auto Shutter
fixed at Min