U
SER
M
ANUAL
C
OLOR
–
R
EV
I
–
09/2016
P
A G E
|
41
How to perform the Flat Field Correction ?
FPN/DSNU Calibration
Cover the lens
Launch the FPN Calibration : Grab and calculation is performed in few seconds
PRNU Calibration
The User must propose a white/grey uniform target to the Camera (not a fixed paper).
The Gain/Light conditions must give a non saturated image in any Line.
The Camera must be set in the final conditions of Light/ Gain and in the final position in the
System.
I f required, set a user target for the FFC adjust and enable it.
White uniform (moving) target. Use The FFC Low Band Filter if the Target can’t
move. This will remove the defects of the target itself
Launch the FFC
Enable the FFC
You can save the FFC result (both FPN+PRNU in the same time) in one of the 4 x
FFC User Banks.
The user target and Gain are saved with the associated FFC in the same memory.
Remove the FFC Low Band filter (set to 0) if used during the Process.
Advices
The Cameras have 4 x FFC Banks to save 4 x different FFC calibrations. You can
use this feature if your system needs some different conditions of lightning and/or Gain
because of the inspection of different objects : You can perform one FFC to be associated
with one condition of Gain/setting of the Camera ( 4 Max) and recall one of the four global
settings (Camera Configu FFC + Line Quarters Balance) when required.
Standard FFC computed on the max of the line for each color (Green
Blue
and Green
Red
are
treated separately). Then the White Balance will overlay the colors
Pixels
