Pike
Technical
Manual
V5.2.3
125
Description of the data path
Description
of
the
data
path
•
On
the
left
you
see
the
image
after
shading
correction.
•
The
surface
plot
on
the
right
clearly
shows
nearly
no
more
gradient
of
the
brightness
(0:
brightest
255:
darkest
pixels).
The
remaining
gradient
is
related
to
the
fact
that
the
source
image
is
lower
than
50%
on
the
right
hand
side.
•
The
histogram
shows
a
peak
with
very
few
different
gray
values.
Loading a shading image out of the camera
GPDATA_BUFFER
is
used
to
load
a
shading
image
out
of
the
camera.
Because
the
size
of
a
shading
image
is
larger
than
GPDATA_BUFFER,
input
must
be
handled
in
several
steps:
Figure 46: Example of shaded image
surface plot
histogram
255.0
0.0
48
0.0
p
ix
els
640.
0 pix
els
256
0
Count: 307200
Min: 139
Mean: 157.039
Max: 162
StdDev: 2.629
Mode: 158 (84449)