® 8k/4k CL
35
UM 8k/4k CL – REVA – 01/13
e2v semiconductors SAS 2013
6.3.5.2
Automatic Calibration
•
FPN/DSNU Calibration
:
o
FPN Calibration Control
(
FPNCalibrationCtrl
) : Launch or abort of the FPN process for the Offsets
calculation
.
These commands are available in the CommCam “Flat Field Correction / Automatic
Calibration ” section :
Read function : “
r calo
” : Returns the FPN Calculation Process Status (0 if finished, 1 if
processing)
Write function :
“
w calo 1
” : Launch the FPN Calibration Process.
“
w calo 0
” : Abort the FPN Calibration Process.
o
FPN Coefficient Reset
(
FPNReset
) : Reset the FPN (Offsets) coefficient in Memory
.
This command
is available in the CommCam “Flat Field Correction / Manual Calibration ” section :
Write function : “
w rsto 0
” : Reset (set to 0) the FPN coefficients in memory. This doesn’t affect
the FFC User Memory Bank but only the active coefficients in Memory.
•
PRNU Calibration
:
o
PRNU Calibration Control
(
FFCCalibrationCtrl
) : Launch or abort of the PRNU process for the Gains
calculation
.
This command is available in the CommCam “Flat Field Correction / Automatic Calibration ”
section :
Read function : “
r calg
” : Returns the PRNU Calculation Process Status (0 if finished, 1 if
processing)
Write function :
“
w calg 1
” : Launch the PRNU Calibration Process.
“
w calg 0
” : Abort the PRNU Calibration Process.
o
PRNU coefficient Reset
(
PRNUReset
) : Reset the PRNU
(Gains) coefficient in Memory
.
This
command is available in the CommCam “Flat Field Correction / Manual Calibration ” section :
Write function : “
w rstg 0
” : Reset (set to “x1”) the PRNU coefficients in memory. This doesn’t
affect the FFC User Memory Bank but only the active coefficients in Memory.
Some Warnings can be issued from the PRNU/FPN Calibration Process as “pixel Overflow” of “Pixel
Underflow” because some pixels have been detected as too high or too low in the source image to be
corrected efficiently.
The Calculation result will be proposed anyway as it’s just a warning message.
The Status Register is the changed and displayed in CommCam “Status” section :
Register status is detailed chap §6.3.3.
