Instruction manual

Description of the data path
MARLIN Technical Manua
l
Page 43
Figure 27: Automatic white balance sequence
Finally, the calculated correction values can be read from the WHITE_BALANCE register 80Ch.
8.4 Manual gain
The following ranges can be used when manually setting the gain for the analog video signal:
B/W CCD-cameras: 0 … 24 dB Color CCD-cameras: 0 … 16 dB
B/W CMOS camera: 0 … 13.5 dB
The increment length is ~0.0354 dB/step for CCD-models and 1.25 dB for CMOS.
Thus the values to be entered will be within the following ranges:
B/W CCD-cameras: 0 ... 680 Color CCD-cameras: 0 ... 450
B/W CMOS camera: 0 … 8
 Setting the gain does not change the offset (black value).
 Higher gain also produces greater image noise. This reduces image quality. For this reason,
try to increase the brightness first, using the aperture of the camera optics and shutter
settings.