Dalsa S3-10-01k40-R - Page 62

62 Spyder 3 CL User's Manual
03-032-20008-00 DALSA
Set up the camera operating environment
(i.e. line rate, exposure, offset, gain, etc.)
Set the calibration sample size using
the command css. It is recommended that
you use the default setting.
Perform FPN calculation
Perform PRNU calculation
1.Stopalllightfromenteringthecamera.(Tip:Coverlenswithalenscap.)
2.Verifythattheoutputsignalleveliswithinrangebyissuingthecommand
 or . Iftherearetoomanyzerosintheoutputdata(morethan6.25%
ofoutputdatawithintheroi),
increasetheanalogoffset()orusethe 
automatedalgorithm .Iftheaverageofthepixelsistoohighforyour
app lication,reducetheanalogoffsetorgainlevel().
3.Issuethecommand .ThecamerawillrespondwithOK>(ifnoerroroccurs).
FPNcalculationautomaticallycalibratesFPN
coefficientsanddigitaloffset.
4.Afterthecalibrationiscomplete,youshouldsavethesesettingstonon‐volatile
memorysotheybereusableonreboot.Todoso,issuethecommandsand
 .
5.Toverifyoutput,enabletheFPNcoefficientsusingthecommand .
Youshouldseeclosetozero
output.
gl gla
sao
cao0
sag
ccf
wfc
wus
epc10
i
1.Placeawhitereferenceinfrontofthecamera.
2.Verifythattheoutputsignalleveliswithinrangebyissuingthecommand
or .Ifthesignallevelistoolow,increaseyourlightlevel,adjusttheanalog
gain()orusetheautomatedalgorithm .
DALSArecommendsa
targetvalueofabout80%ofsaturation.Ifyouchange
thegain,FPNcoefficientsshouldberecalculated.
3.Issuethecommand .ThecamerawillrespondwithOK>(ifnoerroroccurs).
4.Afterthecalculationiscomplete,youcansavethesesettingstonon‐volatile
memorysotheywill
berememberedafterpower‐downanddirectionchange.
Todoso,issuethecommandsand
5
gl
gla
sag ccgi0i
ccp
wpc wus.
.Enablethecoefficientsusingthecommand, . epc11
PerformPRNUcalculationnexttodeterminethemultiplication
factorsrequiredtobringeachpixeltotherequiredvalue(balancetarget)for
flat,whiteoutput.
Set the region of interest to include all
of the image’s pixels of importance using
the command roi x1 y1 x2 y2. You can use
the default if you want to calibrate all pixels.
Note: All commands listed above are described in detail in the following sections.