Pike
Technical
Manual
V5.2.3
121
Description of the data path
Description
of
the
data
path
Shading correction
Shading
correction
is
used
to
compensate
for
non-homogeneities
caused
by
lighting
or
optical
characteristics
within
specified
ranges.
To
correct
a
frame,
a
multiplier
from
1
to
2
is
calculated
for
each
pixel
in
1/256
steps:
this
allows
for
shading
to
be
compensated
by
up
to
50%.
Besides
generating
shading
data
off-line
and
downloading
it
to
the
camera,
the
camera
allows
correction
data
to
be
generated
automatically
in
the
camera
itself.
Building shading image in Format_7 modes
horizontal
Binning/sub-sampling
is
always
done
after
shading
correction.
Shading
is
always
done
on
full
horizontal
resolution.
Therefore
shading
image
has
always
to
be
built
in
full
horizontal
resolution.
vertical
Binning/sub-sampling
is
done
in
the
sensor,
before
shading
correction.
Therefore
shading
image
has
to
be
built
in
the
correct
vertical
resolution.
First example
4
×
horizontal
binning,
2
×
vertical
binning
build
shading
image
with
0
×
horizontal
binning
and
2
×
vertical
binning
Second example
2
out
of
16
horizontal
sub-sampling,
2
out
of
8
vertical
sub-sampling
build
shading
image
with
0
×
horizontal
binning
and
2
out
of
8
vertical
sub-
sampling
Note
•
Shading
correction
does
not
support
the
mirror
function.
•
If
you
use
shading
correction,
do
not
change
the
mirror
function.
•
Due
to
binning
and
sub-sampling
in
the
Format_7
modes
read
the
following
hints
to
build
shading
image
in
Format_7
modes.
Note
Build
shading
image
always
with
the
full
horizontal
resolution
(0
×
horizontal
binning
/
0
×
horizontal
sub-sampling),
but
with
the
desired
vertical
binning/sub-sampling.
