User`s manual
Features
104 Basler aviator Camera Link
7.3 Gain
The camera’s gain setting is adjustable. As
shown in Figure 32, increasing the gain
increases the slope of the response curve
for the camera. This results in a higher gray
value 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 a lower
gray value for a given amount of sensor
output.
Increasing the gain is useful when at your
brightest exposure, a gray value lower than
255 (in modes that output 8 bits per pixel),
1023 (in modes that output 10 bits per pixel),
or 4095 (in modes that output 12 bits per
pixels) is reached. 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 mode), you could
increase the gain to 6 dB (an amplification factor of 2) and thus reach gray values of 254.
This section (Section 7.3) describes the basic theory of gain and how gain can be
adjusted "manually", i.e., by setting the value of the individual gain related
parameters.
The camera also has a Gain Auto function that can automatically adjust the gain.
Manual adjustment of the gain parameters will only work correctly if the
Gain Auto function is disabled. For more information about auto functions in
general, see Section 7.8 on page 116. For more information about the Gain Auto
function in particular, see Section 7.8.4 on page 124.
Note that on cameras delivered from the factory, the exposure auto, gain auto, and
white balance auto (on color cameras) functions will all become enabled
whenever you power on or reset the camera. This behavior happens due to the
way that the camera’s configuration sets are set in the factory. More specifically, it
happens because the auto functions factory setup is selected as the default
configuration set and the default configuration set is designated as the "startup"
set. To change this behavior, you must change the configuration set settings. For
more information about configuration sets, see Section 7.19 on page 170.
Fig. 32: Gain in dB
Gray Values
(12-bit) (8-bit)
Sensor Output Signal (%)
(10-bit)
4095 1023 255
12 dB 6 dB 0 dB
0 25 50 100
0