Axis P1425-LE Mk II - Page 21

AXISP1425-LEMkIINetworkCamera
Video
Important
UseWDRincombinationwithautomaticexposurecontrol.Otherexposuresettingscouldgiveundesirableresults.
ExposureSettings
Exposureistheamountoflightthecamera’ssensorcapturesforascene.Toomuchlightresultsinawashedoutimageandtoo
littlelightresultsinadarkimage.
Exposurevalue-UsetheExposurevalueslidertoadjusttheoverallbrightnessoftheimage.
Exposurecontrol-Selectasuitableoptiontocontrolexposure.
FormostscenestheAutomaticoptionwillprovidethebestresults.Theshutterspeedisautomaticallysettoproduceoptimum
imagequality.
Iftheimageickersthatcanbecausedbyuorescentlampsorotherlightsources.Toreduceickerintheimage,selecttheFlicker
optionthatmatchesthepowerlinefrequency.
TheHoldcurrentoptionlocksthecurrentexposuresettings.
Maxexposuretime-Shutterspeed,alsocalled‘exposuretime’standsforthelengthoftimethecamerashutterisopen,thereby
exposingthecamerasensortolight.Ifshutterspeedisfastitcanfreezeactioneffectively.Ifshutterspeedisslow,itcancause
movingobjectstoappearblurred.Decreasingtheexposuretimewillreducemotionblur.
Exposurezones-Thissettingdetermineswhichpartoftheimageisusedtocalculatetheexposure.Formostsituations,theAuto
settingcanbeused.
YoucanselectapredenedareabydeningIncludeandExcludewindowswithintheimage.Excludewindowsexcludeareasthatare
toobrightordark,andIncludewindowsincludeareasinthescenethathavebetterlightingwhichwillcontributetotheexposuredata.
TheremustbeatleastoneIncludewindow.TherecanbeatotaloftenIncludeandExcludewindowstotailortheexposurezone.
NotethatanExcludewindowiseffectiveonlywhenplacedinsideanincludewindow.
Tip:IfanareaisextremelybrightdrawanIncludewindowtocoverthewholeareaanddeneExcludewindowswithinitto
blockoutthebrightareas.
Shutter&Gain
Theshutterandgainsettingsaffecttheamountofmotionblurandnoiseintheimage.Toadapttodifferentlighting,available
storagespaceandbandwidth,itisoftennecessarytoprioritizeeitherlowmotionblurorlownoise.TheAxisproductallows
usingdifferentprioritizationinnormallightandinlowlight.
Shutterspeedisrelatedtotheamountoftimetheshutterisopenedandismeasuredinseconds(s).Aslowshutterspeedallows
morelighttoreachthesensorandcanhelpproduceabrighterimageinlowlightsituations.Ontheotherhand,aslowshutter
speedcancausemovingobjectstoappearblurry.
SetWideDynamicRangetoWDROffandsetShutterto
•Autotosettheshutterspeedautomatically.Ifrequired,useMaxshuttertolimittheshutterspeedtopreventtheframe
ratefrombeingreduced.
Forexample,toget30fps,setMaxshutterto1/30.
•Fixedtouseaxedshutterspeed.
Gain,measuredindecibel(dB),istheamountofamplicationappliedtotheimage.Ahighgainmayprovideabetterimageinlow
lightsituationsbutwillincreasetheamountofimagenoise.
SetGainto
•Autotosetthegainautomatically.Ifrequired,useMaxgaintolimittheappliedgain.
•Fixedtouseaxedgain.
WhenShutterandGainarebothsettoAuto,itispossibletosetthePrioritybetweenlowmotionblurandlownoisemanuallyandto
useadifferentPriorityinNormalLightandinLowLight.
Example
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