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Reversible image hiding scheme using predictive coding and histogram shifting

Reversible image hiding scheme using predictive coding and histogram shifting. Piyu Tsia,Yu -Chen Hu,Hsiu -Lien Yen Signal Processing 日期 :1 月 4 號 報告 者 : 許睿中. Outline . Introduction Related works The proposed scheme Experimental results Conclusions. Introduction. Embedding Algorithm.

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Reversible image hiding scheme using predictive coding and histogram shifting

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  1. Reversible image hiding scheme using predictive coding and histogram shifting PiyuTsia,Yu-Chen Hu,Hsiu-Lien Yen Signal Processing 日期:1月4號 報告者:許睿中

  2. Outline • Introduction • Related works • The proposed scheme • Experimental results • Conclusions

  3. Introduction Embedding Algorithm Secret Data Extraction Algorithm stego-image original image

  4. Related words – Ni et al.s scheme Peak=3 Zero=7 peak Zero Originalimage pixels

  5. Related words – Ni et al.s scheme Secret data=101100 stego-image pixels

  6. The proposed scheme-embedding error value=basic pixel-residual pixel Originalimage

  7. The proposed scheme-embedding peak peak zero zero residual value peak=-1,zero=-4 peak=0,zero=4

  8. The proposed scheme-embedding Secret data={11000 00100 10100 110}

  9. The proposed scheme-embedding residual pixel=basic pixel-error value stego image

  10. The proposed scheme-extraction Secret data={11000 00100 10100 110}

  11. Experimental results

  12. Experimental results 3*3 4*4

  13. Experimental results

  14. Experimental results-Ni et al.sscheme VS This scheme Ni et al’s scheme peak=16591 可藏16591個bit This scheme peak=23723 peak=13539 可藏37262個bit

  15. Experimental results hide capacity=38771 PSNR=49.056db hide capacity=11416 PSNR=48.787db hide capacity=58281 PSNR=49.259db

  16. Conclusions • The proposed scheme intends to improve the histogram-based data hiding scheme which embeds secret data into the peak points of the image histogram. • To achieve a higher hiding capacity , secret data are embedded in the residual images instead of the image histogram.

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