Teledyne EV71YC1MCL2010-BA0, User Manual, Page: 36 / 59

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7.8.1 Activation, Auto-Adjust

FFC Activation ( FFCEnable ) : Enable/disable the Flat Field Correction. This command is available in
the
CommCam “Flat Field Correction” section :

Read function (ASCII): “ r ffcp ” : Returns the FFC Status (0 if disabled, 1 if enabled)

Write function (ASCII):

“ w ffcp 1 ” (ASCII): Enable the FFC.

“ w ffcp 0 ” (ASCII) : Disabled the FFC

FFC Adjust Function : This Feature is available in the CommCam “Flat Field Correction/
Automatic Calibration” section :
o
Gains adjust ( FFCAdjust ) : Enable/Disable the function

Read function (ASCII): “ r ffad ”. Returns the status of the function (0 if disabled)

Write function(ASCII) :

“ w ffad 0 ” (ASCII): Disable the FFC Adjust function.

“ w ffad 1 ” (ASCII) : Enable the FFC Adjust function.
o
Auto Adjust Target Level ( FFCAutoTargetLevel ) : set the value for the User Target.

Read function (ASCII): “ r tfad ”. Returns the Target value (from 0 to 4095)

Write function (ASCII): “ w tfad <value> ” : Set the Target Value (in 12bits)
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.