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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