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Kim,Y.& Nam,J.(2009).Statisticalalgorithm andapplication forthenoisevarianceestimation.Journalofthe Korean Data & Information ScienceSociety,20,869?878.
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Kim,H.& Park,T.(2010).A urban main streetscapeanalysisusing imagedata.JournaloftheKoreanDataAnalysisSociety,12(2B),1009-1019.
Kim, Y. & Park, Y. (2013). Noise reduction by sigma filter applyingorientations of feature in image. Journal of the Korean Data andInformationScienceSociety,24(6),1127-1139.
Jung,S.& Kim,N.(1988).Adaptiveimagerestoration ofsigma filterusinglocal statistics and human visual characteristics. Electronics Letters,24(4),201-202.
Amer,A.& Dubois,E.(2005).Fastandreliablestructure-orientedvideonoiseestimation. IEEE Transactions on Circuits and Systems for VideoTechnology,15,113-118.