User guide

Description of the data path
STINGRAY Technical Manual V4.4.4
127
Manual gain
Stingray cameras are equipped with a gain setting, allowing the gain to be
manually adjusted on the fly by means of a simple command register write.
The following ranges can be used when manually setting the gain for the ana-
log video signal:
Brightness (black level or offset)
It is possible to set the black level in the camera within the following ranges:
0 ... +16 gray values (@ 8 bit)
Increments are in 1/64 LSB (@ 8 bit)
The IIDC register brightness at offset 800h is used for this purpose.
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. (SmartViewCtrl1
tab: Target grey level)
Type Range Range in dB Increment length
Stingray color cameras 0 ... 680 0 ... 24.4 dB
~0.0359 dB/stepStingray b/w cameras 0 ... 680 0 ... 24.4 dB
Stingray F-504B/C 0 ... 670 0 ... 24.053 dB
Table 44: Manual gain range of the various Stingray types
Note

• Setting the gain does not change the offset (black
value)
• A higher gain produces greater image noise. This
reduces image quality. For this reason, try first to
increase the brightness, using the aperture of the cam-
era optics and/or longer shutter settings.
Note

• Setting the gain does not change the offset (black
value).