ALLIED Vision Technologies Marlin F-201 - Manual (Page 73)

Description of the data path
MARLIN Technical Manual V2.4.0
73
Automatic 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 process is aborted.
The following flow diagram illustrates the automatic white balance sequence.
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 a grid is used 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 follow the current active image
size.
Figure 38: Automatic white balance sequence
Note
L
Configuration
To set position and size of the control area
(Auto_Function_AOI) in an advanced register: see
Table 117:
Advanced register: Autofunction AOI on page 222.
Pause image
capture
Capture image
via One_shot
Calculate and
set correction
values
Restart image
capture if
necessary
Repeat steps
six times