Piranha Color Camera User’s Manual 41
DALSA 03-032-10211-01 5/9/2007
4 = This algorithm adjusts the analog gain so that the peak tap ROI pixels are
adjusted to the specified target.
Peak
arget
Before
Calibration
lgorithm Four
t
Tap value. Use 0 for all taps. Color selection limits the taps that may be
selected by this command. See scl for further information.
i
Calculation target value in a range from 1024 to 4055DN (12 bit LSB).
Notes: Analog gain calibration requires constant light on a clean, white reference. White
plastic or white ceramic is ideal.
If very few tap pixels are within the ROI, gain calculation may not be optimal.
When all taps are selected, taps outside of the ROI are set to the average gain of the
taps that are within the ROI.
Perform analog gain algorithms before performing FPN and PRNU calibration.
All digital settings affect the analog gain calibration. If you do not want the digital
processing to have any effect on the camera gain calibration, then turn off all digital
settings by sending the commands:
sdo 0 0, epc 0 0, ssb 0 0, ssg 0
4096, and sab 0 0.
Example:
ccg 2 0 3040
Related
Commands:
sag, ssg
Setting Analog Offset
Purpose: Sets the analog offset. The analog offset should be set so that it
is at least 3 times the RMS noise value at the current gain.
DALSA configures the analog offset for the noise at the
maximum specified gain and as a result you should not need to
adjust the analog offset.
Syntax:
sao t i
Syntax Elements:
t
Tap selection. Use 0 for all taps. Color selection limits the
taps that may be selected by this command. See scl for
further information.
i
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