Dalsa Spyder3 S3-14-01k40-00-R, Руководство пользователя

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58 Spyder3 S3-14 and S3-24 Monochrome Camera User's Manual
03-032-20117-01 Teledyne DALSA
Subtracting Background
Use the backgrou nd su btract com m and after p erform ing flat field correction if you w ant to im p rove you r
im age in a low contrast scene. It is u sefu l for system s that p rocess 8 bit d ata bu t w ant to take ad vantage of
the camera’s 12 bit d igital p rocessing chain. You shou ld try to m ake your d arkest pixel in the scene equal
to zero.
Camera Link Command
Parameter Description Notes
ssb t i t:
Tap selection. Allow able range is
1
to
2
d ep end ing on cam era m od el, or
0
for all
tap s.
i:
Su btracted valu e in a range in DN from
0
to
4095
.

When su btracting a d igital valu e from the d igital
vid eo signal the ou tp u t can no longer reach its
m axim u m . Use the
ssg
com m and to correct for
this w here:
ssg value =
max output value
max output value - ssb value
Example
ssb 0 25
Setting Digital System Gain
Im p roves signal ou tp u t sw ing after a backgrou nd su btract. When su btracting a d igital valu e from the d igital vid eo
signal, u sing the
ssb
com m and , the ou tp u t can no longer reach its m axim u m . Use this com m and to correct for this
w here:
ssg value =
max output value
max output value - ssb value
Camera Link Command
Parameter Description Notes
ssg t i t: Tap selection. Allow able range is
1
to
2
, or
0
for all tap s.
i:
Gain setting. The gain ranges are
0
to
65535
. The d igital vid eo valu es are
m u ltip lied by this valu e w here:
Use this com m and in conju nction w ith
the
ssb
com m and .
Example
ssg 1 15
Digital Gain=
4096
i