Dalsa P3-80-**k40-R, User Manual

Page: 45 / 91

Piranha 3 User Manual
DALSA 03-032-10216-02
45
Setting Digital Offset
Purpose: Sets the digital offset. Digital offset is set to zero when you
perform FPN correction (
ccf
command). If you are unable to
perform FPN correction, you can partially remove FPN by
adjusting the digital offset.
Syntax:
sdo t i
Syntax Elements:
t
Tap selection. Allowable range is
1
to
8
, or
0
for all taps.
i
Subtracted offset value in a range from
0
to
2048
where
FPN Coefficient= (12 bit LSB Justified) i
Notes:
•
When subtracting a digital value from the digital video
signal, the output can no longer reach its maximum unless
you apply digital gain using the
ssg
command. See the
previous section for details on the
ssg
command.
Related Commands:
ssg
Example:
sdo 0 100
PRNU Correction
Performing PRNU Correction to a Camera Calculated Value
Purpose: Performs PRNU correction and eliminates the difference in
responsivity between the most and least sensitive pixel creating a
uniform response to light.
Syntax
ccp
Notes:
•
Perform all analog adjustments before calculating PRNU.
•
Perform FPN correction before PRNU correction.
•
If FPN cannot be calibrated, use the
rpc
command to reset
all coefficients to zero, and save them to memory with the
wfc
command. You can then adjust the digital offset (
sdo
command) to remove some of the FPN.
•
Ensure camera is operating at its expected analog gain,
integration time, and temperature.
•
Refer to Calibrating the Camera to Remove Non-
Uniformity (Flat Field Correction)on page 35 for a
procedural overview on performing flat field correction.
Related Commands:
ccf