42 NED
XCM
4085TLCT6
UME-0062-01
4.9 Digital Gain / Offset Settings
4.9.1 Setting Digital Gain (1)
Digital gain is set with the following commands: Digital Gain (Common) “gdx”; digital
ga
in (R) “gdxr”; digital gain (G) “gdxg”; digital gain (B) “gdxb”. RGB (Common)
digital gain setting should be used when making small adjustments to multiple
cameras.
Individual colours’ digital gain should be used for adjusting white balance
etc.
Note :
Gain and noise are proportionally related. Adjust the amount of gain in
accordance with the requirements of your camera system.
4.9.2 Setting Digital Gain (2) Automatic White Balance
By automatically adjusting R, G, B gain, white balance can be adjusted. Setting is
done by sending the command “awb”. The camera calculates the average value of
the central 256 pixels, then adjusts the other 2 colours to the level of the brightest
colour. To return to the previous value, send the command “rwb” to reset each gain
level to x1.
Note :
If the data change is too large, the image is saturated, or the maximum level
is exceeded, an error will occur and adjustment will be cancelled.
。
4.9.3 Setting Digital Offset
Through the RGB (Common) setting, offset can be set within the range of -40 ~ +40
(DN) for 8-bit, or -160 ~ +160 (DN) for 10-bit output. Through the individual R, G, B
settings, offset can be set within the range of -20 ~ +20 (DN) for 8-bit or -80 ~ +80
(DN) for 10-bit output. Offset is set with the following commands: Offset RGB
(Common) “odx”; Offset R “odxr”; Offset G “odxg”; Offset B “odxb”.
Figure 4-9-3 Saturation Exposure and Dark Current Output
Se
Volume of Light（lx・s）
Output(DN)
Fs
：Saturation Output (DN)
Df
：Dark Current (DN)
Se
：Saturation Exposure (DN)
Fs
0
Minus offset
Plus offset
Df
