FLIR GRASSHOPPER 3 Series Technical Reference page 89

The user can adjust the red and blue values. Both values specify relative gain, with a value that is half the
maximum value being a relative gain of zero.
White Balance has two states:
State
Off
On/Manual
The following table illustrates the default gain settings for most cameras.
The camera can also implement Continuous and Once white balance. One use of Continuous and Once white
balance is to obtain a similar color balance between cameras that are slightly different from each other. In theory,
if different cameras are pointed at the same scene, using Continuous and Once results in a similar color balance
between the cameras.
Once only attempts to automatically adjust white balance for a set period of time before stopping. It uses a "white
detection" algorithm that looks for "whitish" pixels in the raw Bayer image data. Once adjusts the white balance
for a specific number of iterations; if it cannot locate any whitish pixels, it will gradually look at the whitest objects
in the scene and try to work off them. It will continue this until has completed its finite set of iterations.
Continuous is continually adjusting white balance. It differs from Once in that it works almost solely off the whitest
objects in the scene.
For the GS3-PGE-23S6C model, when using the Raw pixel format only manual white balance is supported.
To adjust white balance:
GenICam—Analog Control
n
FlyCapture API—Setting White Balance Using the FlyCapture API
n
2/10/2017
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FLIR Integrated Imaging
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The same gain is applied to all pixels in the Bayer tiling.
The Red value is applied to the red pixels of the Bayer tiling and the Blue value is applied to
the blue pixels of the Bayer tiling.
Black and White
Color
Note: The white balance of the camera before using Continuous
and Once must already be relatively close; that is, if Red is set to
0 and Blue is at maximum (two extremes), Continuous and Once
will not function as expected. However, if the camera is already
close to being color balanced, then Continuous and Once will
function properly.
Note: The term Continuous is the same as Auto and the term
Once is the same as One Push.
Grasshopper
8 Grasshopper3 PGE Attributes
Description
Red Blue
32 32
1023 1023
®
3 PGE Technical Reference
78