weather recognition based on images captured

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1、WeatherRecognitionBasedonImagesCapturedbyVisionSysteminVehicleXunshiYan1,YupinLuo1,andXiaomingZheng21TsinghuaNationalLaboratoryforInformationScienceandTechnology(TNList),DepartmentofAutomation,TsinghuaUniversity,Beijing100084,China2INFTechnologies,Ltd.,Beijing100086,C

2、hinayanxs06@mails.thu.edu.cn,luo@tsinghua.edu.cn,zheng@tsinghua.edu.cnAbstract.Weatherrecognitioniswidelyrequiredinmanyareas,anditisalsoachallengingandbrand-newsubject.Thispaperproposesanapproachtorecognizeweatherbasedonimagescapturedbyin-vehiclevisionsystem.Webringth

3、reegroupsoffeatures,includinghistogramofgradientamplitude,HSVcolorhistogram,roadinformation,andemployanalgorithmbasedonRealAdaBoost,makinguseofthecategorystruc-turetoachievethetaskofclassification.Experimentsconfirmsuperiorperformancesonourdatasetcollectedfromimagescapt

4、uredbyvisionsystem.Keywords:Weatherrecognition,Visionsystem,RealAdaBoost,HSVcolorspace,Categorystructure.1IntroductionComputervisionsystemhasachievedgreatsuccessinmanyareas,suchassurveillance,navigation,driverassistancesystem.However,thecamerasexposedoutsideareeasilyi

5、nfluencedbybadweather.Forexample,pedestriandetectionsysteminvehiclecouldnotworkatallwhenraindropfallsonthecamera,evenresultsseriousfalse-detection.Manyvisionsystemsalsoneedtoresetparameterssuchaslighting,rainwiper,underdifferentweatherconditions.Hence,researchofweatherr

6、ecognitioninvisionsystemisinurgentdemand.Weatherrecognitionisabrand-newsubjectandonlyafewofpreviousworkhasaddressedthisissue.GargandNaya[1]inColumbiaUniversityfocusondetectingandremovingrainstreaksfromvideos.Theideacomesfrommovingobjectdetection.Itmakesadifferencebetwe

7、enthetwoadjacentframes,andcangivesomeperfectresultsundercertainscenarios,butitishardtosatisfythedynamicbackgroundorthesituationofraindropsadherentonthecam-era.KurihataandandTakahashi[2][3]inNagoyaUniversitycollectlargemountofraindroppatches,utilizeprincipalcomponentan

8、alysistomakearaindroptemplate.Theysearchtheglobalorpartofimagesbycomputingthesimilar-itybetweentheraindroptemplateandthepatc