Pike
Technical
Manual
V5.2.3
109
Description of the data path
Description
of
the
data
path
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
IEEE1394
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)
There
is
also
an
auto
white
balance
feature
available
which
continuously
optimizes
the
color
characteristics
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
equally
weighted
RGB
pixels
in
the
image.
Figure 41:
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
