关键词: 清晰度, 目标区域, 特征参量, 预处理, 影像评估, 航天遥感

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