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Description of the data path
OSCAR Technical Manual V2.4.0
63
Automatic white balance
The auto white balance feature continuously optimizes the color characteris-
tics of the image.
As a reference, it uses a grid of at least 300 samples equally spread over the
area of interest or a fraction of it.
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 represent the current active
image size.
Within this area, the R-G-B component values of the samples are added and
used as current values for the feedback.
The following drawing illustrates the AUTOFNC_AOI settings in greater detail.
Note
L
Configuration
To set position and size of the control area
(Auto_Function_AOI) in an advanced register: see Table 95:
Advanced register: Autofunction AOI on page 193.
Figure 29: AUTOFNC_AOI positioning
AOI: Y-size
AOI: X-size
AF_AREA_SIZE: Width: n x 128
AF_AREA_SIZE: Height: n x 128
0,0
AF_AREA_POSITION: Left,Top
Sampling grid for Auto-Function