Piranha4 4K Color Camera User's Manual
53
Teledyne DALSA
03-032-20180-00
Calibrating the Camera
Important Note
:
to ensu re best resu lts, the cond itions u nd er w hich you calibrate the cam era (e.g.
tem p eratu re and illu m ination) shou ld be as close to the actu al op erating cond itions as p ossible.
Figure 17: Flat Field Calibration in CamExpert
Overview
The follow ing d iagram and accom p anying d escrip tion exp lain the cam eras signal p rocessing chain. Each
elem ent show n, w ith the excep tion of color interp olation, is u ser p rogram m able.
Figure 18: Camera Calibration Process.
D igital Processing
1.
Fixed p attern noise (FPN ) calibration is u sed to su btract any resid u al d ark level that m ay occu r in
the ap p lication.
2.
Photo resp onse non u niform ity (PRN U) calibration is u sed to cor rect for variations in the
illu m ination intensity and / or lens vignetting. When p erform ed , this calibration w ill cau se the
Video
Gain
Output
Video
Digital Processing (color)
-
+
Offset
BlackLevel
(ssb)
x
Gain
(ssg 3)
-
Calibrate FPN
flatfieldCalibrationFPN
(ccf)
xR
xG xB
White
Balancing
BalanceWhiteAuto
(bwa,
ssg(0,1,2))
X X X X
X X X X
X X X X
Color
Correction
colorCorrectionMode
(ctv)
x
Calibrate
PRNU
flatfieldCorrectionMode
flatfieldCalibrationPRNU
flatfieldCorrectionAlgorithm
(cpa,ffm)
