Download P2-80-12K40 - Stemmer Imaging

PRELIMINARY
P2-80-12K40 User’s Manual
48
To perform PRNU calibration to a camera calculated peak value, use the command:
Purpose:
Performs PRNU calibration and eliminates the difference in
responsivity between the most and least sensitive pixel creating a
uniform response to light. Using this command, you do not have to
provide a calibration target.
Syntax:
ccp [i]
Syntax Elements:
[i]
When the optional parameter is provided, each tap’s analog gain
so that 8-13% of pixels within a tap are above the value specified
in the target value. This command sets the analog gain first to i
before calculating the PRNU coefficients range from 256 to
1004DN. If value is left blank, current gain values are used.
•
Notes:
•
•
Example:
This command performs the same function as the cpa 1 i
command but does not force you to enter a target value.
Perform all analog and digital adjustments before calibrating
PRNU.
Calibrate FPN before calibrating PRNU.
ccp
Figure 15: PRNU Calibration (ROI=1-12288) (ccp 800 or cpa 1 800)
Video
Gain
clipped
to 3.99
1023DN
800DN
After PRNU correction
511DN
Before PRNU correction
400DN
200DN
100DN
0
12288
Tap 1 odd
Tap 2 even
Tap 5 odd
Tap 6 even
Tap 3 odd
Tap 4 even
Tap 7 odd
Tap 8 even
Pixel Number
DALSA
03-32-10128-03