Piranha Color Camera User’s Manual
44
DALSA
03-032-10211-01
5/9/2007
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
withOK>
(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
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.
Digital offset and digital system gain, and background subtract and
add values should be set to zero (
,
,
,
)
ssb 0 0sdo 0 0ssg 0 0sab 0 0
FPN Measurement
Performing FPN Measurement
Purpose:
Measures fixed pattern noise (FPN).
Syntax:
ccf
Notes:
•
Before sending this command, use the
scl
command to
select the color or colors you want to adjust. This allows
you to limit the calibration to a single color.
•
Perform all analog and digital adjustments before
performing FPN correction.
•
Perform FPN correction before PRNU correction.
To save FPN coefficients after calibration, use the
command.
Summary of Contents for PC-30-02K60
Page 6: ...Piranha Color Camera User s Manual 6 DALSA 03 032 10211 01 5 9 2007 ...
Page 32: ...Piranha Color Camera User s Manual 32 DALSA 03 032 10211 01 5 9 2007 Exposure Modes in Detail ...
Page 72: ...Piranha Color Camera User s Manual 72 DALSA 03 032 10211 01 5 9 2007 ...
Page 88: ...Piranha Color Camera User s Manual 88 DALSA 03 032 10211 01 5 9 2007 ...
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