Instruction manual

Description of the data path
PIKE Technical Manual V3.1.0
107
If the image capture is active (e.g. IsoEnable set in register 614h), the
frames used by the camera for white balance are also output on the 1394 bus.
Any previously active image capture is restarted after the completion of
white balance.
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 the whole image or a subset of it is used.
To set position and size of the control area (Auto_Function_AOI) in an
advanced register: see Table 126: Advanced register for autofunction AOI on
page 238.
AUTOFNC_AOI affects the auto shutter, auto gain and auto white balance fea-
tures and is independent of the Format7 AOI settings. If this feature is
switched off the work area position and size follow the current active image
size.
Figure 57: Automatic white balance sequence