图像融合在地面目标检测及特征提取中的应用研究

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1、国防科学技术大学硕士学位论文图像融合在地面目标检测及特征提取中的应用研究姓名：罗有敢申请学位级别：硕士专业：信息与通信工程指导教师：庄钊文20091101国防科学技术大学研究生院硕十学位论文ABSTRACTWiththerapiddevelopmentofsensortechnologyanditswideuseinmilitaryaffairs，remotesensingandindustry,themultisensordatafusionhasbecometheresearch’Shottopic．Asanimportan

2、tbranchofdatafusion，thepurposeofimagefusionistoreduceuncertaintyandtominimizeredundancyintheoutputwhilemaximizingusefulinformation．Thisdissertationfocusesongroundtargetdetectionandfeatureextractionbasedonimagefusion．Themajorworkandconclusionsareasfollows：1．Thecompari

3、sonaboutdifferentimagefusionalgorithmsarestudied．Thesealgorithmsareappliedinmulti-focusimagefusion，multi-spectralimagefusion，aswellasIRandvisibleimagefusion．Experimentalresultshowsthatmulti-resolutionanalysisismoreuniversalandreliableinimagefusiontoimproveimagedefini

4、tion，entropyandSNR．Finally,itisconcludedthatthewavelettransformwasthekeydirectiontobeinvestigated．2．Smallgroundtargetdetectionbasedonimagefusionisresearched．Itisdimculttodetectsmallgroundmovingtargetbysingleframe’imageduetoitslowSNRandbeinglackoftexturefeature．Subseq

5、uently,anapplicationsystembasedondifferentialimagefusionispresented，whichWasusedindualbandinfraredsmallgroundtargetdetectionundercomplexbackground．Thismethoddecomposedthedifferentialimageintomultistagelevelbywavelettransform．Thenthedetectionresultswereacquiredbyrecon

6、structeddifferentialimages．ExperimentalresultshowsthatthemethodcanbemoreefficienttodetectlowSNRmovingsmalltargetsundercomplexbackgroundandreducefalsealarm．3．Featureextractionbasedonregionimagefusionisresearched．Toke印thespatialresolutionandtexturedetailinformationofvi

7、sibleimagesandsensitivityofIRimage，astationarywaveletmethodbasedonROIisproposed．Forhi．曲-frequencypartinwavelettransformationdomain，weadoptthefusionruleofchoosingthemaxcoefficientvalue，whileforlow—frequencypart，adoptthefusionruleoflocalenergybasedonneighborhoodpixelgr

8、ay．ThenthefeatureextractionresultsareacquiredinthereconstructedROIimage．Experimentalresultshowsthatit’Smoreefficienttogettheobjectf