Axis Communications P5512 Manuel d'utilisateur Page 18

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AXISP5512-EPTZDomeNetworkCamera
Video
Forquicksetup,useoneofthepredenedstreamproles.Eachpredenedprolehasadescriptivename,indicatingitspurpose.If
required,thepredenedstreamprolescanbemodiedandnewcustomizedstreamprolescanbecreated.
Tocreateanewproleormodifyanexistingprole,gotoSetup>Video>StreamProles.
ToselectadefaultstreamprolefortheLiveViewpage,gotoSetup>LiveViewCong.
CameraSettings
TheVideo>CameraSettingspageprovidesaccesstoadvancedimagesettingsfortheAxisproduct.
ImageAppearance
IncreasingtheColorlevelincreasesthecolorsaturation.Thevalue100givesmaximumcolorsaturation.Thevalue0givesa
blackandwhiteimage.
TheimageBrightnesscanbeadjustedintherange0–100,whereahighervalueproducesabrighterimage.
IncreasingtheSharpnesscanincreasebandwidthusage.Asharperimagemightincreaseimagenoiseespeciallyinlowlight
conditions.Alowersettingreducesimagenoise,butthewholeimagewillappearlesssharp.
TheContrastchangestherelativedifferencebetweenlightanddark.Itcanbeadjustedusingtheslidebar.
LocalContrastappliescontrasttoaspecicareaoftheimage.Usetheslidertoadjustthecontrast,whereahighervalueproduces
animagewithhighcontrastbetweenthedarkandlightareas.
WhiteBalance
Whitebalanceisusedtomakecolorsintheimageappearthesameregardlessofthecolortemperatureofthelightsource.TheAxis
productcanbesettoautomaticallyidentifythelightsourceandcompensateforitscolor.Alternatively,selectthetypeoflight
sourcefromthedrop-downlist.Foradescriptionofeachavailablesetting,seetheonlinehelp
.
ExposureSettings
Conguretheexposuresettingstosuittheimagequalityrequirementsinrelationtolighting,framerateandbandwidth
considerations.
Exposurecontrol-Thesesettingsisusedtoadapttotheamountoflightused.Automaticisthedefaultsettingscanbeusedinmost
situations.Theshutterspeedisautomaticallysettoproduceoptimumimagequality.
Maxexposuretime-Selectthemaximumexposuretimefromthedrop-downlist.Increasingtheexposuretimewillimprove
imagequality,butdecreasetheframerate.Theremayalsobeanincreaseinmotionblur.CheckingAllowslowshutterdecreases
theshutterspeedinlowlighttoimproveimagebrightness.
EnableBacklightcompensation-Enablethisoptionifabrightspotoflight,forexamplealightbulb,causesotherareasin
theimagetoappeartoodark.
Maxgain-Measuredindecibels(dB),gaindescribestheamountofamplicationappliedtoasignal,inthiscasethevisual
informationintheimage.Ahighlevelofamplicationmayprovideabetterimageinverylowlightsituations.Ahighgainwillalso
increasetheamountofimagenoise.
IRcutlter
TheIRcutlterpreventsinfrared(IR)lightfromreachingtheimagesensor.Inpoorlightingconditions,forexampleatnight,or
whenusinganIRlamp,settheIRcutltertoOff.Thisincreaseslightsensitivityandallowstheproductto“see”infraredlight.The
imageisshowninblackandwhitewhentheIRcutlterisoff.
IfusingautomaticExposurecontrol,settheIRcutltertoAutotoautomaticallyswitchbetweenOnandOffaccordingtothe
lightingconditions.
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