White Balance (Applies To All Color Cameras) - Basler GIGE VISION ace acA640-100gm/gc Manual

Area scan cameras

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Color Creation and Adjustment

7.2

White balance capability has been implemented on color models of the camera. White balancing

can be used to adjust the color balance of the images transmitted from the camera.

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.

To set the Balance Ratio parameter for a color:

Set the Balance Ratio Selector to red, green, or blue.

Set the Balance Ratio Abs parameter to the desired value for the selected color.

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White Balance

(Applies to All Color Cameras)

Note

The white balance parameters can be set manually as described below, or they

can also be set for automatic adjustment.

The Balance White Auto feature is an auto function and is the "automatic"

counterpart to manually setting the Balance Ratio Abs parameter for red, green,

and blue as described below. The exposure auto function automatically adjusts

the Balance Ratio Abs parameter values.

Manual adjustment of the Balance Ratio Abs parameter 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 10.10 on

page

165.

For more information about the Balance White Auto function, see Section 10.10.5

page

177.

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White Balance (Applies To All Color Cameras) - Basler GIGE VISION ace acA640-100gm/gc Manual

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