Dalsa Piranha ES Series, User Manual

Page: 62 / 106

Piranha ES-xx User Manual
03-032-20070-02 Teledyne DALSA
62
Setting Digital Offset
Pu rp ose: Sets the d igital offset. Digital offset is set to zero w hen you
p erform FPN correction (
ccf
com m and ). If you are u nable to
p erform FPN correction, you can p artially rem ove FPN by
ad ju sting the d igital offset.
Syntax: sdo t i
Syntax Elem ents:
t
Tap selection. Allow able range is 1 to nu m ber of CCD tap s,
or 0 for all tap s.
i
Su btracted offset valu e in a range from 0 to 511 (12-bit LSB).
N otes:

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 u nless
you ap p ly d igital gain u sing the
ssg
com m and . See the
p reviou s section for d etails on the
ssg
com m and .
Related Com m and s:
ssg , ccf
Exam p le:
sdo 0 100
FPN Correction
Performing FPN Correction
Syntax: Perform s FPN correction and elim inates FPN noise by su btracting
aw ay ind ivid u al p ixel d ark cu rrent. For a com p lete d escrip tion on
how to u se this com m and , see the Flat Field Correction Overview
on p age 58.
Syntax:
ccf
N otes:

Before p erform ing this com m and , stop all light from
entering the cam era. (Tip : cover lens w ith a lens cap .)

Perform all analog and d igital ad ju stm ents before
p erform ing FPN correction .

Perform FPN correction before PRN U correction .

The
ccf
com m and is not available w hen the CCD d irection
is externally controlled (
scd 2
) (see Direction Control on
p age 26). Direction control m u st be stable w hile the cam era
is calcu lating coefficients.

Available in TDI Mod e only.

Save coefficients before changing d irections, changing
op erating m od e, or p ow ering off.
Related Com m and s: ccp , cpa
Exam p le:
ccf