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Reversible Data Embedding Using a Difference Expansion Adviser:Pro.Yu-Chiang Li Speaker: Yi-Lun Chen DATE:2014/06/26 Author: Jun Tian Data Source: IEEE Transactions on Circuits and Systems for Video Technology, Vol.13, No.8, pp.890896, 2003. 南台科技大學 資訊工程系 Outline 2 1 Introduction 2 Background 3 Materials & Methods 4 Experiments and Result 5 Conclusion Materials & Methods(5/12) Difference Expansion(DE)提取資料 ℎ′ = 11(10) = 1011(2) b=LSB(ℎ′), h = ℎ′ 2 得 嵌入訊息b=1 原始像素差h=5 3 = 取最低位元(LSB)。 11 2 = 5.5 = 5