® 8k/4k CL
36
UM 8k/4k CL – REVA – 01/13
e2v semiconductors SAS 2013
6.3.5.3
Manual Flat Field Correction
The FFC Coefficients can also be processed outside of the Camera or changed manually by accessing directly
their values in the Camera : This is the “Manual” FFC.
In CommCam, the User can access to a specific interface by clicking on “click for extended control” in both
“Manual FFC calibration” and “Manual FPN calibration sections” :
This will allow the user to upload/download out/in the Camera the FFC coefficients in/from a binary or text
file that can be processed externally.
It is recommended to setup the baud rate at the maximum value possible (115000 for example)
otherwise the transfer can take a long time.
•
FPN coefficients modification
:
Direct access to the FPN coefficients for reading or writing
.
The FPN coefficients are read packets of x128 coefficients :
Read function : “
r ffco <addr>
” : Read 128 consecutive FPN user coefficients starting from
<addr>
address. Returned value is in hexadecimal, without space between values (one unsigned short per
coefficient).
Write function :”
w ffco <addr><val>
: Write
128
consecutive FPN user coefficients starting from
the
<addr>
address.
<val>
is the concatenation of individual FPN values, without space between the
values (one unsigned short per coefficient).
•
PRNU coefficients modification
:
Direct access to the PRNU coefficients for reading or writing
.
The PRNU coefficients are read packets of x128 coefficients :
Read function : “
r ffcg <addr>
” : Read 128 consecutive PRNU user coefficients starting from
<addr>
address. Returned value is in hexadecimal, without space between values (one unsigned short per
coefficient).
Write function :”
w ffcg <addr><val>
: Write
128
consecutive PRNU user coefficients starting from
the
<addr>
address.
<val>
is the concatenation of individual PRNU values, without space between the
values (one unsigned short per coefficient).
