4 01 JOURNALOFXI ANJIAOTONG UNIVERSITY Vo.4 No. Jun.01,"# (;$.%<=>.?,710049,;)!":!"#$%&' ()*+,-.,/01!"#$&.31 45789:;,8< =93>?@ABCDE,( 45",FGH(1H,I=JKLH,M"#$NO 45@A,= PQ&@APQ.RS;TU,V/& 4578WXYT, =>45@A45!"#$%&9,45;9:Z[\]/^_ 0.08,3)()*`a_b5c. #$%: 45;!"#$;; &':TN911.73 :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. :faceimage;superresoution;sparserepresentation;positiondictionary @ABCDEFGHIJKCD E@A,LMNOPQRSJ CDE@AJTU.VW@ABCDE@A BCDETUXVWYJN, XZ[ \]^_`abcjn. (VW@ABCDEO: J [1?].J [3?]. JQKCDE@A CDE@A,XJ, :011?10?. :(1987-),,!;"#($%),&,',!. (:)* +,-./0((09714);'1..--/0((01100111001). 34578:01?03?0 3459::tp: нwww.cnki.net/kcms/detai/1.109.t.01030.1705.00.tm
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