Description of the data path
STINGRAY Technical Manual
V2.2.0
100
Finally, the calculated correction values can be read from the
WHITE_BALANCE register 80Ch.
Automatic white balance
The auto white balance feature continuously optimizes the color characteris-
tics of the image.
For the white balance algorithm the whole image or a subset of it is used.
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 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 132:
Advanced register: Autofunction AOI
on page 275.
Figure 55: AUTOFNC_AOI positioning
AF
_AREA_
SIZE
: Heigh
t: n x
4
AO
I: Y-
siz
e
AOI: X-size
AF_AREA_SIZE: Width: n x 4
0,0
AF_AREA_POSITION: Left,Top
Sampling grid for Auto-Function