User`s manual

Basic Operation & Standard Features
3-16
BASLER A600f
DRAFT
As shown in the top graph in Figure 3-8,
setting the brightness higher than the
default value of 725 moves the
response curve to the left. This would
increase the 8 bit value output from the
camera for any given 10 bit value from
the sensor and thus increase the
apparent brightness of the image.
As shown in the bottom graph, setting
the brightness lower than the default
value of 725 moves the response curve
to the right. This would decrease the 8
bit value output from the camera for any
given 10 bit value from the sensor and
thus decrease the apparent brightness
of the image.
Figure 3-8: Brightness Setting Changes Mapping
3.5.1 Setting the Gain
The camera’s gain setting is determined by the value field in the Gain control register (see page
4-9). The value can range from 0 to 255 (0x00 to 0xFF). Typical settings and the resulting
amplification are shown in Table 3-1.
Table 3-1: Gain Settings
Decimal Hex dB Amplification
Factor
Decimal Hex dB Amplification
Factor
0 0x00 0.0 x 1.0 128 0x7F 8.0 x 2.5
28
0x1C 2.5 x 1.3 170 0xAA 9.5 x 3.0
43
0x2A 3.5 x 1.5 213 0xD4 10.9 x 3.5
85
0x55 6.0 x 2.0 255 0xFF 12.0 x 4.0
L
Because the sensor used on the A600f has a direct digital output, the implementation
of the gain settings on
A600f cameras is different from the implementation on other
Basler cameras. This means that you can not directly compare the response of an
A600f camera to another Basler camera with the same gain setting. For example, if
you compare the response of an
A600f with the gain set to 100 and an A301f with the
same gain setting, you will see a significant difference. This happens because the
gain scales on the two cameras are implemented differently and are not directly com-
parable.
0 256 512 768 1023
64
128
192
255
10 Bit Sensor Output
Brightness Set to 850
Increasing Light
0 256 512 768 1023
64
128
192
255
10 Bit Sensor Output
Brightness Set to 600
Increasing Light