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1 4 01 JOURNALOFXI ANJIAOTONG UNIVERSITY Vo.4 No. Jun.01,"# (;$.%<=>.?,710049,;)!":!"#$%&' ()*+,-.,/01!"#$& :;,8< 45",FGH(1H,I=JKLH,M"#$NO 4578WXYT, 0.08,3)()*`a_b5c. #$%: 45;!"#$;; &':TN :A ():053?987X(01)0?0007?05 LIYuua,QICun (ScooofEectronicsandInformationEngineering,Xi anjiaotonguniversity,xi an710049,cina) :A nove metodusingpositiondictionarypairsisproposedtoreconstructaig resoutionfrontafaceimagefrom asingeow resoution version.sincetecontentsand structuresintesamepositionoffaceimagepatcesaresimiarandaremoreikeytobebeter representedbytecombinationoftesamedictionaryatoms,faceimagesusedfortrainingare bockedintooverappedpositionpatces.tenasmapositiondictionarypairistrainedforeac position.abasicigresoutionimagecanberecoveredforeacowresoutioninputbyusing tesepositiondictionarypairs.finay,tevisuaquaityoftereconstructedimageisimproved by using a residua compensation metod. Experimenta resuts sow tat face images reconstructedbyteproposedmetodavebetervisuaefect.acomparisonwitteagoritm ofimagesuperresoutionviarawimagepatcesbasedsparserepresentationsowtattessim ofteproposedmetodis0.08iger;wietetrainingtimeissortenedabout5times. E@A,LMNOPQRSJ [email protected]@ABCDE@A BCDETUXVWYJN, XZ[ \]^_`abcjn. (VW@ABCDEO: J [1?].J [3?]. JQKCDE@A CDE@A,XJ, :011?10?. :(1987-),,!;"#($%),&,',!. (:)* +,-./0((09714);'1..--/0(( ) :01?03?0 3459::tp: н

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