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1、AbstractAbstractSyntheticApertureRadar,foritsgoodabilityonidentificationofthetargetsandcharacteristicofhighresolution,all-weather,all-day,hasimportantapplicationsinmilitary,environmentalmonitoring,etc.BeforeprocessingonSARimage,suchasmosaic,fusion,changedetection,oneshouldregistratetheima
2、gestakedfromdifferentviewpointsinthesamearea,atthesametimeorthesamesensoratdifferenttimeinspace,inordertoliminatetheproblemsuchastranslation,rotation,scaleandlocaldeformation,derivedfromthetimeoftakingimage,theangle,theenvironment.Therefore,imageregistration,isaveryimportantfieldofimagepr
3、ocessing.Dependingonthespaceofimagefeaturetobeprocessed,registrationalgorithmscanbedividedintotwokinds:areabasedandfeaturebased.Featurematchingcanbasedonspatialrelationorsimilarityoffeaturedescriptors.Featurebasedregistrationmethods,whichdescriptandmatchextractedfeatures,aremorerobustandr
4、eliablethanareabasedmethodsandarewidelyappliedinimageregistration.AimattheregistrationofSARimagewithchangedareas,thispaperfocusesonthefeaturebasedregistrationofSARimage,andthemainlyworkfollowed.(1)AmethodbasedontheconstraintsofmatchingpointsandTINwasproposedfortheregistrationofSARimagewit
5、hchangedareas.Thismethodfirstlyusingimprovedfeaturepointsmatchingstrategytoextractthefeaturepointsfortheinitialmatching;thenuseTIN,whichhasastructurethatdoesnotdependonthenatureofthespecificimagestructure,tothematchingfeaturepointsandoptimizationwithconstraints,indetail,usematchedfeaturep
6、ointswhichcorrespondingtotwoimagestoconstructTINsrespectively,andsearchforapairoftriangleswiththeminimumsamplederror,thentheapexofwhichcorrespondstotheasthecontrolpointsforsolvingthetransformationmatrix.Theexperimentsshowsthatthealgorithmnotonlyincreasedthequalityofmatchingfeaturesbutalso
7、,raisedtheregistrationaccuracythroughtheanalysisofpartialvirtualstructureatthesametime.(2)ThemethodofextractionofchiefedgesisproposedbasedonphaseinformationandanalgorithmofSARimageregistrationbasedonmatchingpairsoflinesegmentsonedgewasproposed.Methodcombinedwithimpr
