
® 16k CXP
39
UM 16k CXP – Indice E - 06/13
e2v semiconductors SAS 2013
Feature
Description
FFCEnable
- Disable Flat Field Correction
- Enable Flat Field Correction
FPNReset
Reset FPN coefficients of the RAM memory
PRNUReset
Reset PRNU coefficients of the RAM memory
FPNValueAll
Memory containing FPN
Format: S9.1 => -256..+255.5 step ½
FPNValueSize
Integer providing FPN value size in byte
PRNUValueAll
Memory containing PRNU
Value from 0 to 4095
Format: U2.10 : (1+coeff/1024) => x1..x4.999877 step 1/1024
PRNUValueSize
Integer providing PRNU value size in byte
FFCCalibrationCtrl
FFC calibration
0
= Abort PRNU calibration by setting it to “Off” (no effect if already stopped)
1
= Launch PRNU calibration by setting it to “Once” (no effect if already launched)
FPNCalibrationCtrl
FPN calibration
0
= Abort FPN calibration by setting it to “Off” (no effect if already stopped)
1
= Launch FPN calibration by setting it to “Once” (no effect if already launched)
FFCAdjust
- Disable FFC adjust
- Enable FFC adjust
FFCAutoTargetLevel
Set FFC target adjust level, from 0 to 4095, step 1
FFCGainAdjust
FFC Gain Adjust
FFC Adjust : A good usage.
When there are several Cameras to set up in a system on a single line, the most difficult is to have a
uniform lightning whole along the line.
If each Camera performs its own Flat field correction, relative to the max of each pixel line, the result
will be a succession of Camera lines at different levels.
=> The FFC Adjust function allows to set the same target value for all the Cameras in the system and
then to get a perfect uniform line whole along the system with a precision of 1 LSB to the Target.
The Maximum correction is x2 the highest value of the line.
The reasonable value for the User Target is not more than around 20% of the max value of the line.
6.2.7.1
Automatic Calibration
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 Device Control Status section.