Page no. 26 | Appendix No. 1
3.
Choose one of Auto Gain modes: “Once” or “Continuous”. Under “Once” mode, the algorithm will adjust
the Analog Gain only once, and then the feature will be set to OFF. Respectively under “Continuous” mode,
the gain will be adjusted continuously.
Figure 17 – Auto Gain mode selection
The following tables specifies the auto exposure parameters:
Parameter
Description
Gen<i>Cam name
Type
Possible values
Remarks
Value
Gen<i>Cam name
Gen<i>Cam Category: AnalogControl
Auto Gain
Auto Gain Selector
GainAuto
Enumeration
0x00
Off
0x01
Continuous
0x02
Once
Auto Gain Min
Auto Gain Min Value
GainAutoMin
Float
Range: 1 to
Auto Gain Max
Auto Gain Max Auto Gain Max Value
GainAutoMax
Float
Range: Auto
Gain Min to 252
Auto Gain Filter
Ratio
Sets the Auto Gain filter
effective ratio
GainAutoFilterRatio
Float
Range: 0 to 1
Table 12 – Gain Auto control
10.3
Combined Auto Exposure & Auto Gain Mode
When operating in this mode, the camera tries to reach the preferred picture brightness by adjusting both
Exposure and Analog Gain values. If the camera’s image intensiveness is under desired brightness level, the
algorithm first increases exposure value to make the picture brighter. If exposure level is at maximum value, while
preferred brightness level is not reached yet, the algorithm starts to modify Gain Level and adjust exposure level
accordingly.
This mode is operational only when both Auto Exposure and Auto Gain are set to “Continues” mode.
Steps to set Combined Auto Exposure and Auto Gain Mode:
1.
Define the parameters for Auto Exposure, please see the related topic for detailed instructions.
2.
Set Auto Exposure to “Continuous” mode.
3.
Define the parameters for Auto Gain, please see the related topic for detailed instructions.
4.
Set Auto Exposure to “Continuous” mode.
