Dalsa Piranha 3 P3-80-08k40-00-R, Руководство пользователя

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Piranha 3 User Manual
03-032-10216-06 Teledyne DALSA
78
Command Syntax Parameters Description
calcu late PRN U
algorithm
cpa
i i
Perform s PRN U calibration accord ing to
the selected algorithm .
The first p aram eter is the algorithm
w here
i
is:
1
= This algorithm first ad ju sts each tap ’s
analog gain so that 8-13% of p ixels
w ithin a tap are above the valu e sp ecified
in the target valu e p aram eter. PRN U
calibration then occu rs u sing the p eak
p ixel in the region of interest. (Id entical
to
ccp i
)
2
= Calcu lates the PRN U coefficients
u sing the entered target valu e as show n
below :
PRNU Coefficient =
Target
(AVG Pixel Value) - (FPN+ value) sdo
The
calcu lation is p erform ed for all sensor
p ixels bu t w arnings are only ap p lied to
p ixels in the region of interest. This
algorithm is u sefu l for achieving u niform
ou tp u t across m u ltip le cam eras.
3
= This algorithm inclu d es an analog
gain ad ju stm ent p rior to PRN U
calibration. Analog gain is first ad ju sted
so that the p eak p ixel valu e in tap ’s ROI
is w ithin 97 to 99% of the sp ecified target
valu e. It then calcu lates the PRN U
coefficients u sing the target valu e as
show n below :
PRNU Coefficient =
Target
(AVG Pixel Value ) - (FPN + value)
sdo
i i
i
The calcu lation is p erform ed for all
sensor p ixels bu t w arnings are only
ap p lied to p ixels in the region of interest.
This algorithm is u sefu l for achieving
u niform ou tp u t across m u ltip le cam eras.
The second p aram eter is the target valu e
to u se in a range from
1024
to
4055
DN .
section 3.4.2 Analog and Digital Signal
Processing Chain
4 = This algorithm is the sam e as 2 w ith
the excep tion that it only calcu lates
PRN U for the p ixels w ithin the cu rrent
Region of Interest (ROI).
The second p aram eter is the target valu e
to u se in a range from
1024
to
4055
DN .
correction set sam p le
css m
Set nu m ber of line sam p les averaged for
p ixel coefficient calcu lations or for
ou tp u t of
gla
com m and . Valu es:
256
,
512
,
1024
.
Refer to Retu rning Averaged Lines of
Vid eo on p age 55 for d etails.
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