Dalsa spyder SG-10-01k80, Руководство пользователя

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Spyder3 GigE User’s Manual PRELIMINARY
DALSA 03-032-10158-04
75
•
Perform all analog adjustments before calibrating PRNU.
•
This command performs the same function as the
cpp
command but forces you to enter a target value.
•
Calibrate FPN before calibrating PRNU. If you are not
performing FPN calibration then issue the
rpc
(reset pixel
coefficients) command and set the
sdo
(set digital offset)
value so that the output is near zero under dark.
•
Note: Refer to
288H
Calibrating the Camera to Remove Non-
Uniformity (Flat Field Correction)on page
289H
68 for a procedural
overview on performing flat field correction.
Setting a Pixel’s PRNU Coefficient
Purpose: Sets an individual pixel’s PRNU coefficient.
Syntax:
spc i i
Syntax Elements:
i
The pixel number from
1
to
sensor pixel count
.
i
Coefficient value in a range from
0
to
28671
where:
Example:
spc 1024 10000
Subtracting Background
Purpose: Use the background subtract command after performing flat field
correction if you want to improve your image in a low contrast
scene. It is useful for systems that process 8 bit data but want to
take advantage of the camera’s 12 bit digital processing chain.
You should try to make your darkest pixel in the scene equal to
zero.
Syntax:
ssb t i
Syntax Elements:
t
Tap selection. Allowable range is
1
to
2
depending on
camera model, or
0
for all taps.
i
Subtracted value in a range in DN from
0
to
4095
.
Notes:
•
When subtracting a digital value from the digital video signal
the output can no longer reach its maximum. Use the
98H
ssg
command to correct for this where:
ssg value =
max output value
max output value ‐ ssb value
See the following section for details on the
99H
ssg
command.
Related Commands:
100H
ssg
Example
ssb 0 25
PRNU coefficient
1 +
i
4096