Instruction manual

Guppy PRO Technical ManualV4.1.0
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Description of the data path
Auto white balance (AWB)
The auto white balance feature continuously optimizes the color characteristics
of the image. For the white balance algorithm the whole image or a subset of it
is used.
Auto white balance can also be enabled by using an external trigger. However,
if there is a pause of >10 seconds between capturing individual frames this pro-
cess is aborted.
AUTOFNC_AOI affects the auto shutter, auto gain and auto white balance fea-
tures and is independent of the Format_7 AOI settings. If this feature is switched
off the work area position and size will follow the current active image size.
Within this area, the R-G-B component values of the samples are added and used
as actual values for the feedback. The following drawing illustrates the AUTOF-
NC_AOI settings in greater detail.
Note

The following ancillary conditions should be observed for suc-
cessful white balance:
• There are no stringent or special requirements on the
image content, it requires only the presence of equally
weighted RGB pixels in the image.
• Auto white balance can be started both during active
image capture and when the camera is in idle state.
Note

Configuration
To set position and size of the control area (Auto_Func-
tion_AOI) in an advanced register: see table 140.
Figure 38: AUTOFNC_AOI positioning
AF_AREA_SIZE: Height: n x 4
AOI: X-Size
AF_AREA_POSITION: Left, Top
Sampling grid for Auto-Function
AOI: Y-Size
AF_AREA_SIZE: Width: n x 4
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