›› 2016, Vol. 36 ›› Issue (2): 50-.doi: 10.16708/j.cnki.1000-758X.2016.0024

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Anewdefinitionevaluationmethodforremotesensingimagesofsatellite

TAN  Wei, YANG  Bing-Xin, HE  Hong-Yan   

  1. BeijingInstituteofSpaceMechanics&Electricity,Beijing100094,China
  • Received:2015-03-27 Revised:2015-06-27 Online:2016-04-25 Published:2016-02-26

Abstract: Anewevaluationfunctiontocomputeremotesensingimagedefinitionwasproposedaccordingtoengineeringapplicationsandfeaturesofremotesensingimage,toovercometheshortagesoftraditionalimagedefinitionevaluationfunctions.Forlargedataanddifferentscenerydensityanddistributionofremotesensingimages,thedefinitionevaluatingprocesswasseparatedastargetareadetectionandcharacteristicparameterextraction.Firstly,detectionfunctiondetectedwholeimagetogettherichsceneryandobviousedgeareaastargetarea.Thenagraygradientfunctionmadeimagegraypretreatmentandextracteddefinitioncharacteristicparameterstoevaluateimagedefinition.Threedifferentkindsofremotesensingimages,namely,emulateddefocusingimage,emulatednoiseimageandonorbitsatelliteimagewereusedintheproposedmethod,toverifyitseffectivenessandaccuratenessbycomparingitwithfourtraditionalmethods.Theanalysisandemulationresultsshowthattheproposedmethodcanmeetthefourbasicdemandstoevaluatingremotesensingimagedefinitionandtacklethedeficienciesoftraditionalfunctionsinevaluatingdifferentremotesensingimages,itisavailabletoevaluateremotesensingimagedefinition.

Key words: imagedefinition, targetarea, characteristicparameter, pretreatment, imageevaluation, spaceremotesensing