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Optimal PPVO-based reversible data hiding

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1 Optimal PPVO-based reversible data hiding
Source : Journal of Visual Communication and Image Representation, vol. 48, pp , Oct 2018 Authors : Shaowei Weng, GuohaoZhang Jeng-Shyang Pan and ZhiliZhou Speaker : Chia-Shuo Shih Date : 2018/05/24 1

2 Outline Introduction Related work Proposed method Experimental results
Pixel Value Ordering(PVO) Related work PPVO Histogram Pair Shifting (HPS) Proposed method Experimental results Conclusions 2

3 Introduction --- Pixel Value Ordering (PVO)
PVO is a reversible data hiding method. high visual quality low embedding capacity max 𝑥 ′ =𝑥 𝑖𝑓 𝑑=0 𝑥 ′ =𝑥+𝑏 𝑖𝑓𝑑=1 𝑥 ′ =𝑥+1 𝑖𝑓𝑑>1 min 𝑥 ′ =𝑥 𝑖𝑓 𝑑=0 𝑥 ′ =𝑥−𝑏 𝑖𝑓𝑑=1 𝑥 ′ =𝑥−1 𝑖𝑓𝑑>1 [43] X.L. Li, J. Li, B. Li, B. Yang, “High-fidelity reversible data hiding scheme based on pixel-value-ordering and prediction-error”, Signal Process, vol. 93, no. 1, pp: , 2013. 3

4 Introduction --- Pixel Value Ordering (PVO)
max 𝑥 ′ =𝑥 𝑖𝑓 𝑑=0 𝑥 ′ =𝑥+𝑏 𝑖𝑓𝑑=1 𝑥 ′ =𝑥+1 𝑖𝑓𝑑>1 min 𝑥 ′ =𝑥 𝑖𝑓 𝑑=0 𝑥 ′ =𝑥−𝑏 𝑖𝑓𝑑=1 𝑥 ′ =𝑥−1 𝑖𝑓𝑑>1 𝑋={15,26,25,17} 𝑋𝑠𝑜𝑟𝑡={15,17,25,26} 15 26 25 17 14 27 25 17 𝑠𝑏=1 𝑑𝑚𝑎𝑥=26−25=1 𝑥 ′ =26+1=27 𝑑𝑚𝑖𝑛=17−15=2 𝑥 ′ =15−1=14 4

5 1 Related work- Pixel-based pixel value ordering
Pixel-based pixel value ordering(PPVO) 1 [48] X.C. Qu, H.J. Kim, “Pixel-based pixel value ordering predictor for high-fidelity reversible data”, Signal Process, vol. 111, pp: , 2015. 5

6 Related work- Pixel-based pixel value ordering
2 6

7 1 Related work- Pixel-based pixel value ordering 7 X’=min(9,10,11)
X’=max(9,10,11) 10 9 11 skip 254 X’=254 253 254 Skip 10 X’=10 11 10 Skip 7

8 2 Related work- Pixel-based pixel value ordering 8 X’=9 X”=x-b X’=11
10 11 X’=9 X”=x-b 11 9 10 X’=11 X”=x-b 10 9 11 skip 254 X’=254 X”=x+b 253 254 Skip 10 X’=10 X“=x-b 11 10 Skip 8

9 Related work- histogram pair shifting (HPS)
[50] X. Wang, J. Ding, Q.Q. Pei, “A novel reversible image data hiding scheme based on pixel value ordering and dynamic pixel block partition”, Inform. Sci, vol. 310, pp: 16-35, 2015. 9

10 Related work- histogram pair shifting (HPS)
10

11 Related work- histogram pair shifting (HPS)
MSE=27 MSE=19 11

12 Proposed method 12

13 𝑆 𝑝 𝐶 𝑝 P Proposed method C1 C9 C2 P C3 C7 C5 C4 C6 C12 C10 C8 C11 C13

14 Proposed method 𝑆 𝑝  H1(k,vT1)  14

15 Proposed method 𝑃 𝑒,𝑜𝑝𝑡 1∗  H1(k,vT1)  𝑃 𝑒,𝑜𝑝𝑡 2∗ 15

16 Proposed method 𝑃 𝑒,𝑜𝑝𝑡 1∗ =0 16 162 161 162 161 163
𝐶 𝑚𝑎𝑥 =162, 𝐶 𝑚𝑖𝑛 =161 p= 𝐶 𝑚𝑎𝑥 ,b=1 16

17 Proposed method 𝑃 𝑒,𝑜𝑝𝑡 1∗ =0 17 129 130 118 103 122 133 125 102 106
124 111 112 128 129 130 118 103 122 134 125 102 106 124 111 112 128 133 𝐶 𝑚𝑎𝑥 =130, 𝐶 𝑚𝑖𝑛 =102 p> 𝐶 𝑚𝑎𝑥 17

18 Experimental results 18

19 Experimental results 19

20 Experimental results 20

21 Conclusions flexible prediction pattern
the optimal-embedding-bin search scheme 21

22 -END- 22


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