Dalsa Falcon 1.4M100 HG Monochrome, User Manual

Page: 56 / 95

DALSA Falcon XDR and HG Series Camera User's Manual
56 Serial Interface: How to Control the Camera
the user coefficient set (
csn 1
) before you can perform FPN
calibration. An error message is returned if you attempt to
perform FPN calibration when using
csn 0
.
Example: •
sfc 10 50
3.9.6 Performing PRNU Calibration
Serial Commands: cpa, spc
Purpose: Performs PRNU calibration to a targeted, user defined value
and eliminates the difference in responsivity between the most
and least sensitive pixel creating a uniform response to light.
To use this command, you must provide a calibration target.
Executing these algorithms causes the
ssb
command to be
set to 0 (no background subtraction) and the
ssg
command to
4096 (unity 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.
Syntax: •
cpa i1 i2
Syntax
Elements:
•
i1
PRNU calibration algorithm to use:
2
= Calculates the PRNU coefficients using the entered
target value as shown below:
PRNU Coefficient =
Target
(AVG Pixel Value ) ‐ (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. It is important that the
target value (set with the next parameter) is set to be at
least equal to the highest pixel across all cameras so that
all pixels can reach the highest pixel value during
calibration.
•
i2
Peak target value in a range from 256 to 1013 DN. The
target value must be greater than the current peak output
value.