Mercury Series USB2.0 Cameras User Manual
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Figure 4- 1 VGA Gain
4.4.2.
Digital Gain
The camera also provides a hardware digital gain when outputting 8bit images.
Table4- 6 Digital Gain
Mode
Hardware digital Gain
MER-500-7Ux
MER-030-120Ux
MER-125-30Ux
MER-132-30Ux
ADC Level 0: Original brightness
×
1
ADC Level 1
：
Original brightness ÷ 2
ADC Level 2
：
Original brightness ÷ 4
ADC Level 3
：
Original brightness ÷ 8
ADC Level 4
：
Original brightness ÷ 16
MER-040-60Ux
MER-130-30Ux
MER-310-12Ux
ADC Level 0: Original brightness
×
2
ADC Level 1: Original brightness
×
1
ADC Level 2: Original brightness
÷
2
ADC Level 3: Original brightness
÷
4
4.5.
Black Level
The MER series USB interface camera is all with black level adjustable function. When the user needs to
adjust the black level manually, he should disable the automatic black level calibration function, otherwise
the camera may adjust it automatically.
For CMOS cameras, if the automatic black level calibration function is disabled, some problems will appear
in some situations, especially when using the Mono cameras, some fine grid will appear in the image. Then