Brightness (black level or offset), Chapter – ALLIED Vision Technologies Guppy F-503 User Manual
Page 126
Description of the data path
GUPPY Technical Manual V7.1.0
126
Brightness (black level or offset)
It is possible to set the black level in the camera within the following ranges:
CCD models and Guppy F-503 (CMOS model): 0...+16 gray values (@ 8 bit)
Increments are in 1/16 LSB (@ 8 bit)
Board level versions: Increments are in 1/64 LSB (@ 8 bit)
CCD models: The formula for gain and offset setting is: Y`= G x Y + Offset
Guppy F-036 (CMOS model): -127 .. 127 gray values
Increments are in 8/25 LSB
Note
•
Values can only be changed within the limits of gain
CSR.
•
Changes in auto exposure register only have an effect
when auto gain is active.
•
Auto exposure limits are 50..205. (SmartViewCtrl1
tab: Target grey level)
•
Auto gain of Guppy F-036 (CMOS model) is directly
controlled by the CMOS sensor (the target grey level is
fixed to 125). Changes to this register have no effect in
conjunction with auto gain. Auto exposure is working
in conjunction with auto shutter only.
•
Auto gain of Guppy F-503 (CMOS model) behaves like
Guppy CCD cameras.
Note
•
Setting the gain does not change the offset (black
value) for CCD models.