Performing Prnu Calibration - Dalsa Stop Action 4M30 User Manual

36
3.6.5 Per
Purpose:
Syntax:
Syntax Elemen
Notes:
Example:
03-32-10121-09
PRELIMINARY
form ing PRNU Calibration
Performs PRNU calibration to a targeted, u
eliminates the difference in resp
sensitive pixel creating a uniform response to l
command, you must provide a calibration targ
Executing these algorithms causes the ssb com
(no back
digital gain). The pixel coefficients are disabled (epc 0 0) during
the algorithm execution but returned to the state they were prior to
command execution.
cpa i i
ts:
i
PRNU calibration algorithm to use:
2 = Calculates the PRNU coefficients using the entered target
value as shown below:
PRNU Coefficient =
The calculation is performed for all senso
are only
algorithm is useful for achieving uniform output across multiple
cameras. It is important that the target v
parameter) is set to be at least equal to
all cameras so that all pixels can rea
during calibration.
i
Peak target value in a range from 256 to 101
value must be greater than the current peak
Calibrate FPN before calibrating PRNU
performing FPN calibration t
coefficients) command and set the sdo (set digital offset) value
so that the output is near zero under dark.
The cpa command is not available when the camera is using the
factory calibrated coefficients (csn 0). You must select the user
coefficient set (csn 1) before you can perform PRNU
calibration. An error message is returned if you attempt to
perform PRNU calibration when using csn 0.
cpa 2 700
onsivity between the most and least
ground subtraction) and the ssg command to 4096 (unity
i
(AVG Pixel Value )
applied to pixels in the region of interest. This
hen issue the rpc (reset pixel
4M Stop Action Camera Manual
ser defined value and
ight. Using this
et.
mand to be set to 0
Target
‐ (FPN + value)
sdo
i i
r pixels but warnings
alue (set with the next
the highest pixel across
ch the highest pixel value
3DN. The target
output value.
. If you are not
DALSA