Digital Gain - Basler Racer User Manual

AW00118508000
For detailed information about using the pylon API, refer to the Basler pylon Programmer's Guide
and API Reference.
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon API and the pylon Viewer, see Section 3.1 on
To set the analog gain via direct register access:
Set the value of the Gain Analog All register.

For more information about direct register access, see Section 3.2 on
8.2.1.2

Digital Gain

Adjusting the camera's digital gain will digitally shift the group of bits that is output for the pixel
values from each ADC in the camera.
Increasing the digital gain parameter value will result in an amplified gain and therefore in higher
pixel values. Decreasing the digital gain setting will result in a decreased gain and therefore in lower
pixel values.
The digital gain parameter values can be set on an integer scale ranging from 256 to 2047. This
range of settings is linearly related to a range of amplification factors where a parameter value of
256 corresponds to 0 dB and gain will not be modified and a parameter value of 2047 corresponds
to 18.057 dB and an amplification factor of approximately 8.00.
You can use the formula below to calculate the dB of gain that will result from the GainRaw
parameter values:
Note that due to the nature of digital gain certain gray values will be absent in the image ("missing
codes") if digital gain is set to a value larger than 256.
You can use the remove parameter limits feature to remove to lower limit for digital gain parameter
values. When you use the remove parameter limits feature you can also set digital gain parameter
values in the range from 0 to 256. This corresponds to a range of amplification factors from 0 to
approximately 0.99.
For more information about the remove parameter limits feature, see Section 8.3 on
If the digital gain parameter value is set below 256 using the remove parameter
limits feature: In this case, regardless of the brightness of illumination, the camera
will not be able to reach the maximum gray values that otherwise could be
reached. For example, if the camera is set to a 12 bit pixel format, the maximum
gray value of 4095 can not be reached if the digital gain parameter value is set
below 256.
Basler racer Camera Link
×
=
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Gain dB 20 log
×
=
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Gain dB 20 log
page
Gain Raw
 
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 
256
10
–
( )
Gain Raw 48.165
10
Features
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