User`s manual

AW00049313000 Standard Features
Basler runner 169
11 Standard Features
This chapter provides detailed information about the standard features available on each camera.
It also includes an explanation of their operation and the parameters associated with each feature.
11.1 Gain and Black Level on
Monochrome Cameras
11.1.1 Gain
The camera’s gain is adjustable. As shown in
Figure 58, increasing the gain increases the
slope of the response curve for the camera.
This results in an increase in the gray values
output from the camera for a given amount of
output from the imaging sensor. Decreasing
the gain decreases the slope of the response
curve and results in lower gray values for a
given amount of sensor output.
Increasing the gain is useful when at your
brightest exposure, the highest gray values
achieved are lower than 255 (for pixel data
formats with 8 bit depth) or 4095 (for pixel
data formats with 12 bit depth). For example,
if you found that at your brightest exposure
the gray values output by the camera were no
higher than 127 (in an 8 bit format), you could
increase the gain to 6 dB (an amplification
factor of 2) and thus reach gray values of 254.
As mentioned in the "Functional Description" section of this manual, the sensor uses two different
taps to read pixel data out of the imaging sensor. One tap is used to read out values for the even
numbered pixels in the sensor and one is used to read out values for the odd numbered pixels. As
a result of this design, there are three gain parameters available: Gain Raw All, Gain Raw Tap 1,
and Gain Raw Tap 2.
Gain Raw All is a global adjustment, i.e., its setting affects both the odd numbered and the even
numbered pixels in the sensor.
Fig. 58: Gain in dB
Gray Values
(12-bit)
(8-bit)
Sensor Output Signal (%)