Spyder3 GigE Vision User Manual
03-032-20027-02 DALSA
76
Mnemonic Syntax Parameters
Description
calculate PRNU
algorithm
cpa
i i
Performs PRNU calibration according
to the selected algorithm.
The first parameter is the algorithm
where i is:
1 = This algorithm first adjusts each
tap’s analog gain so that 8-13% of pixels
within a tap are above the value
specified in the target value parameter.
PRNU calibration then occurs using the
peak pixel in the region of interest.
(Identical to ccp).
2 = Calculates the PRNU coefficients
using the entered target value as shown
below:
PRNU Coefficient =
Targ e
(AVG Pixel Value) - (FPN+ value
sdo
The calculation is performed for all
sensor pixels but warnings are only
applied to pixels in the region of
interest. This algorithm is useful for
achieving uniform output across
multiple cameras.
3 = This algorithm includes an analog
gain adjustment prior to PRNU
calibration. Analog gain is first adjusted
so that the peak pixel value in tap’s ROI
is within 97 to 99% of the specified
target value. It then calculates the
PRNU coefficients using the target
value as shown below:
PRNUCoefficient=
Target
(AVGPixelValue)‐(FPN+value)
sdo
i
i
i
The calculation is performed for all
sensor pixels but warnings are only
applied to pixels in the region of
interest. This algorithm is useful for
achieving uniform output across
multiple cameras.
The second parameter is the target
value to use in a range from 1024 to
4055DN.
correction set sample
css
m
Sets the number of lines to sample
when using the gla command or when
performing FPN and PRNU calibration
where m is 256, 512, or 1024
display gpio
configuration
dgc
Displays the current configuration of
the GPIO connector.
display pixel coeffs
dpc
x1 x2
Displays the pixel coefficients in the
order FPN, PRNU, FPN, PRNU, …
x1 = Pixel start number
x2= Pixel end number
in a range from 1 to 1024 or 2048
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