Axis Q8685-E - Page 25

AXISQ8685-EPTZNetworkCamera
Aboutvideosettings
LocalContrastappliescontrasttoaspecicareaoftheimage.Usetheslidertoadjustthecontrast,whereahighervalueproduces
animagewithhighcontrastbetweenthedarkandlightareasandissuitableforsceneswithwidedynamicrange.
Aboutwhitebalance
TochangethissettinggotoSetup>Video>CameraSettings
Whitebalanceisusedtomakecolorsintheimageappearthesameregardlessofthecolortemperatureofthelightsource.TheAxis
productcanbesettoautomaticallyidentifythelightsourceandcompensateforitscolor.Alternatively,selectthetypeoflight
sourcefromthedrop-downlist.Foradescriptionofeachavailablesetting,seetheonlinehelp
.
WideDynamicRange
Widedynamicrange(WDR-ForensicCapture)providesbalancedimagesinsceneswhenthereisaconsiderablecontrastbetween
lightanddarkareasintheimage.Thecameraautomaticallyhandlesthetransitionbetweensuchscenesandlow-lightconditions.In
complexlightconditionsdisablingWDRmightgiveabetterimage.
Important
UseWDRincombinationwithautomaticexposurecontrol.Otherexposuresettingscouldproduceundesirableresults.
ExposureSettings
Exposureistheamountoflightthecamera’ssensorcapturesforascene.Toomuchlightresultsinawashedoutimageandtoo
littlelightresultsinadarkimage.
Exposurevalue-UsetheExposurevalueslidertoadjusttheoverallbrightnessoftheimage.
Exposurezones-Thissettingdetermineswhichpartoftheimageisusedtocalculatetheexposure.Formostsituations,theAuto
settingcanbeused.
YoucanselectapredenedareabydeningIncludeandExcludewindowswithintheimage.Excludewindowsexcludeareasthatare
toobrightordark,andIncludewindowsincludeareasinthescenethathavebetterlightingwhichwillcontributetotheexposuredata.
TheremustbeatleastoneIncludewindow.TherecanbeatotaloftenIncludeandExcludewindowstotailortheexposurezone.
NotethatanExcludewindowiseffectiveonlywhenplacedinsideanincludewindow.
Tip:Ifanareaisextremelybright,drawanIncludewindowtocoverthewholeareaanddeneExcludewindowswithinitto
blockoutthebrightareas.
Shutter&Gain
Theshutterandgainsettingsaffecttheamountofmotionblurandnoiseintheimage.Toadapttodifferentlightingconditions,
availablestoragespaceandbandwidth,itisoftennecessarytoprioritizeeitherlowmotionblurorlownoise.TheAxisproductallows
differentprioritizationsinnormalandlowlight.
Shutterspeedisrelatedtotheamountoftimetheshutterisopenedandismeasuredinseconds(s).Aslowshutterspeedallows
morelighttoreachthesensorandcanhelpproduceabrighterimageinlowlight.Ontheotherhand,aslowshutterspeedcan
causemovingobjectstoappearblurry.
SetShutterto:
Note
SettheWideDynamicRangetoWDROffbeforechangingtheshutterspeed.
•Autotosettheshutterspeedautomatically.Ifrequired,useMaxshuttertolimittheshutterspeedtopreventtheframe
ratefrombeingreduced.
Forexample,toget30fps,setMaxshutterto1/30.
•Fixedtouseaxedshutterspeed.
Gain,measuredindecibel(dB),istheamountofamplicationappliedtotheimage.Ahighgainmayprovideabetterimageinlow
lightbutwillincreasetheamountofimagenoise.
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