Color Enhancement Features On Aca640-90Gc, Aca640-100Gc And Aca1300-30Gc; Cameras; White Balance - Basler ace acA640-90gm User Manual

8.4 Color Enhancement Features on
acA640-90gc, acA640-100gc and
acA1300-30gc Cameras
8.4.1

White Balance

White balance capability has been implemented on color cameras. White balancing can be used to
adjust the color balance of the images transmitted from the cameras.
Setting the White Balance
This section (Section 8.4) 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 correctly if the Balance White Auto
function is disabled.
For more information about auto functions in general, see Section 10.9 on
page 211.
For more information about the Balance White Auto function, see Section 10.9.5
on page
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 15.98. 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.
Basler ace GigE
223.
Color Creation and Enhancement
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