aster卫星数据在林业上的应用分析——在提取主要树种分布信息和高程信息中的探讨

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1、befound．Itisveryeasytofindthedistributionofpixelsalongthegrayaxis．Doingthisstep，thepathradiationisremoved．Theimagescontrastisenhanced．(3)Imagegeometryrectifyingprocedurehasbeendesignedforresearcharea．Thepolynomialregressionequationhasbeenusedtomatchthesourceimagetodestinationimage．ASTER15mresolu

2、tionimageshavebeenre-sampledto20mresolution．So。eachbandissuitabletomatch20mdestinationimage．Theaccuratenessofmatchingaveragedoutlessthan1pixel．(4)TheRGBsyntheticallyimageprocedurehasbeendesigned．InordertosynthesizeBandl。Band2andBand3NasRGB24bitsimage，ordinarysubprocedurehasbeendesignedtocovert8b

3、itsimageto24bitsbitmapimage．(5)AprocedurewasusedtoconvertRGBcolormodetoHLScolormode．Learningfromrecognizingcategoriesoflanddependingonhumaneyes，thedifferentobjectsoflandisalwaysextractedthroughthesecharacters。suchasbrightness，contrast，colorandtexturesofthetarget．HLScolormodeismoresuitablewiththe

4、wayhowhumaneyesdoing．Ldenotesthereflectionofdifferentlandobjects．ThespectrumofcertaincolorisembodiedbyH．Generally,whentheshadowofimageisinevidence，HLSmodeisalwaysusedtoprocesstheimage．BasedonMatlab7．1，aPCAprocedurewasdesignedtoenhancethespectrumofimage．Itiseasiertorecognizeusingthesynthesizedima

5、gewithPCI，PC2andPC3．(6)Twoimagesupervisorclassificationprocedurehavebeendesignedandtheeffectofclassificationhavebeenchecking．TheeffectofLeast—DistancemethodisnotgoodasBayesmethodthroughtheaccuratetable．Inthispaper,theauthorsurroundsthesecondresearchcontents----extractingDigitalEvolutionM印fromAST

6、ERstereoimages，severalresearchworksalsohavebeendonewithVisualC++IntegratedDevelopmentEnvironment．(1)Thestereopairshavebeenprocessedbyepipolarlinerectifyingmethod．TheresultsareexcellentwhilewiththesupportofNASA—ASTERrectifyingmodule．(2)Thedetachingandequilibriumprocedurehasbeendesignedstereo‘pair

7、s．Imageequilibriumisamethodwhichcouldenhancetheinformationinimages．ThemethodcouldVImakethegrayimagesmorelegible．Itisgoodtoexecutecomparingoperationbetweentwoimages．NeitherSSDalgorithmnorSMWalgnrithmwouldsucceedunlessthestere