Spyder3 GigE Vision User’s Manual
DALSA 03-032-20027-02
49
Set up the camera operating environment
(i.e. line rate, exposure, offset, gain, etc.)
Set the calibration sample size using
the command css. It is recommended that
you use the default setting.
Perform FPN calculation
Perform PRNU calculation
1.
Stop
all
light
from
entering
the
camera.
(Tip:
Cover
lens
with
a
lens
cap.)
2.
Verify
that
the
output
signal
level
is
within
range
by
issuing
the
command
or
.
If
there
are
too
many
zeros
in
the
output
data
(more
than
6.25%
of
output
data
within
the
roi)
,
increase
the
analog
offset
(
)
or
use
the
automated
algorithm
.
If
the
average
of
the
pixels
is
too
high
for
your
application,
reduce
the
analog
offset
or
gain
level
(
).
3.
Issue
the
command
.
The
camera
will
respond
with
OK>
(if
no
error
occurs).
FPN
calculation
automatically
calibrates
FPN
coefficients
and
digital
offset.
4.
After
the
calibration
is
complete,
you
should
save
these
settings
to
non
‐
volatile
memory
so
they
be
reusable
on
reboot.
To
do
so,
issue
the
commands
and
.
5.
To
verify
output,
enable
the
FPN
coefficients
using
the
command
.
You
should
see
close
to
zero
output.
gl
gla
sao
cao
0
sag
ccf
wfc
wus
epc
1
0
i
1.
Place
a
white
reference
in
front
of
the
camera.
2.
Verify
that
the
output
signal
level
is
within
range
by
issuing
the
command
or
.
If
the
signal
level
is
too
low,
increase
your
light
level,
adjust
the
analog
gain
(
)
or
use
the
automated
algorithm
.
DALSA
recommends
a
target
value
of
about
80%
of
saturation.
If
you
change
the
gain,
FPN
coefficients
should
be
recalculated.
3.
Issue
the
command
.
The
camera
will
respond
with
OK>(
if
no
error
occurs).
4.
After
the
calculation
is
complete,
you
can
save
these
settings
to
non
‐
volatile
memory
so
they
will
be
remembered
after
power
‐
down
and
direction
change.
To
do
so,
issue
the
commands
and
5
gl
gla
sag
ccg
i
0
i
ccp
wpc
wus.
.
Enable
the
coefficients
using
the
command,
.
epc
1
1
Perform
PRNU
calculation
next
to
determine
the
multiplication
factors
required
to
bring
each
pixel
to
the
required
value
(balance
target)
for
flat,
white
output.
Set the region of interest to include all
of the image’s pixels of importance using
the command roi x1 y1 x2 y2. You can use
the default if you want to calibrate all pixels.
Note: All commands listed above are described in detail in the following sections in the order
that they should be performed.
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