62 PRELIMINARY Spyder 3 CL User's Manual
03-032-20008-03 DALSA
Digital Signal Processing
To optimize camera performance, digital signal processing should be completed after any
analog adjustments.
FPN Correction
Performing FPN Correction
Syntax: Performs FPN correction and eliminates FPN noise by removing
individual pixel dark current.
Syntax:
ccf
Notes:
• Perform all analog and digital adjustments before
performing FPN correction.
• Perform FPN correction before PRNU correction.
• Refer to
Calibrating the Camera to Remove Non-Uniformity
(Flat Field Correction) on page
59 for a procedural overview
on performing flat field correction.
• To save FPN coefficients after calibration, use the
wfc
command. Refer to section
7.9 Saving and Restoring PRNU
and FPN Coefficients for details.
Related Commands:
ccp, wfc
Example:
ccf
Setting a Pixel’s FPN Coefficient
Purpose: Sets an individual pixel’s FPN coefficient.
Syntax
sfc x i
Syntax Elements:
x
The pixel number from 1 to sensor pixel count.
Coefficient value in a range from 0 to 2047 (12 bit LSB).
Example:
sfc 10 50
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