AW00011916000 Color Creation and Enhancement
Basler scout GigE 181
10.3 Color Enhancement Features
10.3.1 White Balance
The white balance feature lets you adjust the balance of red, green, and blue such that white objects
in the camera’s field of view appear white in the acquired images.
Setting the White Balance
With the white balancing scheme used on these cameras, the red intensity, green intensity, and blue
intensity can be individually adjusted. For each color, a Balance Ratio parameter is used to set the
intensity of the color. If the Balance Ratio parameter for a color is set to a value of 1, the intensity
of the color will be unaffected by the white balance mechanism. If the ratio is set to a value lower
than 1, the intensity of the color will be reduced. If the ratio is set to a value greater than 1, the
intensity of the color will be increased. The increase or decrease in intensity is proportional. For
example, if the balance ratio for a color is set to 1.2, the intensity of that color will be increased by
20%.
The balance ratio value can range from 0.00 to 3.98. But you should be aware that if you set the
balance ratio for a color to a value lower than 1, this will not only decrease the intensity of that color
relative to the other two colors, but will also decrease the maximum intensity that the color can
achieve. For this reason, we don’t normally recommend setting a balance ratio less than 1 unless
you want to correct for the strong predominance of one color.
This section (Section 10.3.1) describes how a color camera’s white balance can
be adjusted "manually", i.e., by setting the value of the Balance Ratio Abs
parameters for red, green, and blue.
The camera also has a White Balance Auto function that can automatically adjust
the white balance. Manual adjustment of the Balance Ratio Abs parameters
for red, green, and blue will only work if the Balance White Auto function is
disabled.
For more information about auto functions in general, see Section 12.9 on
page 287.
For more information about the Balance White Auto function, see Section 12.9.5
on page 299.
When you are using matrix color transformation and you set the Light Source
Selector parameter to match your light source characteristics, the camera will
automatically make adjustments to the white balance settings so that they are best
suited for the light source of the type you selected.
For more information about matrix color transformation, see Section 10.3.3 on
page 185.
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