Instruction manual

Guppy Technical ManualV7.4.0
96
Description of the data path
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 characteristics
of the image.
As a reference, it uses a grid of at least 65535 (2
16
) samples equally spread over
the area of interest or a fraction of it.
Auto white balance (AWB) 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.
Figure 59: One-push white balance sequence
Note

The following ancillary conditions should be observed for suc-
cessful white balance:
• There are no stringent or special requirements on the
image content, it requires only the presence of equally
weighted RGB pixels in the image.
• Auto white balance can be started both during active
image capture and when the camera is in idle state.
Pause image
capture
Capture image
via one-shot
Calculate and
set correction
values
Restart image
capture if
necessary
Repeat steps
nine times