NED
NUCLi7370AT6
UME-0069-03
46
4.10 Setting Gain
The camera can adjust the gain (x1 to x 2.5). As shown in the figure below,
increasing the gain setting increases the gradient of the camera
’s response curve and
results in a higher camera output for a given amount of light.
Figure 4-10-1 PGA Gain Adjustment
Gain and noise values are proportionally related.
Adjust the amount of gain in accordance with the requirements of your camera
system.
The relations with VAL(Gain set value) and Gain(magnification) are as following
formulas.
Gain initial set value : initVAL
Gain
=
(283
-
initVAL)
/
(283
-
VAL)
VAL
=
283
-
{(283
-
initVAL)
/
Gain}
For example;
When
“initVAL” of Gain initial set value at red channel is 91 and you want to get
VAL for two times (x 2.00) of Gain, the VAL is as follows.
VAL
=
283
-
{(283
-
91)
/
2}
=
187
Gain set commend: r187
Fs
Fs : Saturation Output
Gain a
Amount of Incident
Light (lx
・
s)
(a<b<c)
Gain b
Gain c