Dalsa Piranha ES Series, User Manual

Page: 57 / 106

Piranha ES-xx User Manual
Teledyne DALSA 03-032-20070-02
57
In the follow ing exam p le, analog gain is set for all tap s. The p eak valu e of each tap w ithin
the region of interest is calibrated to the sp ecified target valu e. All tap s com p letely
ou tsid e the region of interest are calibrated to the average analog gain valu e of the tap s
insid e the region of interest.
Figure 22: Calculating Analog Gain for all Taps
Video
Region of Interest
V
id
e
o
0
8192 2600
6400
3040
After analog gain calibration
Before analog gain calibration
0
4095
Scenario 3:
ccg 1 0 3040
When calibrating all taps, taps completely outside the region
of interest (in this example, taps 1to 4 and 14 to 16) are calibrated to the
average analog gain of taps within the region of interest. Taps
within the region of interest calibrate to the target value. Note: Seams
between taps will be visible until you perform PRNU calculation using
the ccp command.
Pixel Number
Setting Analog Offset
Pu rp ose: Sets the analog offset. The analog offset shou ld be set so that it is
at least 3 tim es the rm s noise valu e at the cu rrent gain. The analog
offset is configu red for noise at the m axim u m sp ecified gain and
as a resu lt you shou ld not need to ad ju st the analog offset.
Syntax:
sao t i
Syntax Elem ents: t
Tap selection. Use
0
for all tap s or
1
to nu m ber of CCD tap s
for ind ivid u al tap selection.
i
Offset valu e in a range from
0
to
255
DN (12 bit LSB).
Exam p le:
sao 3 35