Auto white balance (awb), Auto white balance – ALLIED Vision Technologies Stingray F-504 User Manual
Page 122
Description of the data path
STINGRAY Technical Manual V4.4.4
120
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.
The following flow diagram illustrates the one-push white balance
sequence.
Finally, the calculated correction values can be read from the
WHITE_BALANCE register 80Ch.
Auto white balance (AWB)
The auto white balance feature continuously optimizes the color character-
istics of the image.
For the white balance algorithm the whole image or a subset of it is used.
Note
The following ancillary conditions should be observed for
successful white balance:
•
There are no stringent or special requirements on the
image content, it requires only the presence of mono-
chrome pixels in the image.
Figure 55: One-push white balance sequence
Pause image
capture
Capture image
via one-shot
Calculate and
set correction
values
Restart image
capture if
necessary
Repeat steps
nine times