极光图像分类与极光视频事件检测的探索分析

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1、万方数据AbstractAbstractAuroraisamassdischargeprocessaroundEarth.Whenthechargedparticlesfromthesunareneartheearth,partofthemwillbeforcedbyearthmagneticfieldalongthefieldlinetothenorthandsouthpoles.Thentheygettotheupperatmosphereofpolar,collidewiththeatomsandmoleculesint

2、heatmosphereandformtheaurora.Auroraphenomenonisverybeautiful,itoftenaffectsradiocommunication,longcablecommunication,etc.Besides,auroracanalsoaffecttheclimateandbiologicalprocesses.Therearedifferentphysicalmeaningfordifferentshapesofaurora,whichmakeauroraimageclassi

3、ficationandauroravideoeventdetectionareofgreatsignificanceinscientificresearchBecauseofthefilmingequipmentdarkcurrentandtheinfluenceoftheatmosphereintheprocessoffilmingtheauroraimages,thebrightnessofauroraimagesareuneven.Top-hattransformisusedtoimprovethisinthispape

4、r.Accordingtotheshapefeaturesofauroraarenotfixed,BoW(BagofWords,BoW)isusedtomodeltheauroraimageswhichcanavoidextractingfeaturesfromauroramorphology.InviewofthedefectsofBoW,anauroraimageclassificationmethodbasedonLDAwithsaliencyinformationisproposed.Whichmeansthismet

5、hod,usingSR(SpectralResidual,SR)saliencymapsintheprocessofLDA(LatentDirichletAllocation,LDA)modelingfortheauroraimages.SVMisutilizedtoconducttheexperimentofauroraimageclassification.Thefindingshowsthatthismethodcanachievefavorableclassification.Besides,thispaperstud

6、iesdeeplytheapplicationofperceptualhashalgorithminimageretrievalandusesthisalgorithmtoconductauroraeventdetection.Usingthehashcodesimilarityofauroraimagescanmakeauroraeventdetectionmorefastandeffective.Theexperimentshowstheeffectivityofthisalgorithm.Keywords:Aurorai

7、mageclassificationBagofwordsmodelLatentdirichletallocationSaliencymapPerceptualhashEventdetection万方数据目录1目录第一章绪论.....................................................................................................................11.1研究背景及意义...........................

8、.....................................................................11.2国内外研究进展及现状.......................................................