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Enhanced Watermarking Using Amplitude Modulation: A Robust and Accurate Approach

This paper presents an advanced method for image watermarking based on amplitude modulation. The proposed technique involves balancing watermark bits around embedding pixels and tuning the strength of the watermark during the embedding process. Various methods, including XOR and Gaussian masks, are explored for effective watermark embedding and retrieval. Experimental results demonstrate significant improvements in watermark robustness against attacks. By incorporating error control coding and multiple embedding techniques, the accuracy and reliability of the watermarking process can be further enhanced.

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Enhanced Watermarking Using Amplitude Modulation: A Robust and Accurate Approach

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  1. Enhanced images watermarking based on amplitude modulation Image and Vision Computing, 24 (2006), 111–119 Authors :T. Amornraksa, K. Janthawongwilai Presenter:李振祥

  2. Outline • Introduction • Amplitude modulation based watermarking • The proposed method • Experimental results • Conclusions

  3. Introduction • L(I,j)=0.299R(I,j)+0.587G(I,j)+0.114B(I,j) • By balancing watermark bits around the embedding pixel.(preparing process) • By properly tuning the strength of embedding watermark. (embedding process) • By modifying the methods of pixel prediction. (retrivieval process)

  4. Amplitude modulation based watermarking(1/3) Scaling factor Luminance Watermark

  5. Amplitude modulation based watermarking(2/3)

  6. Amplitude modulation based watermarking(3/3) rewrite

  7. The proposed method

  8. The proposed method-1 • XOR (for watermark)

  9. The proposed method-1 0

  10. The proposed method-2 • Gaussian mask

  11. 6 7 5 7 7 7 6 6 7 7 8 8 7 7 8 8 9 9 The proposed method-3 • Pixel value replacing

  12. Experimental results

  13. Experimental results

  14. Experimental results

  15. Experimental results

  16. Experimental results

  17. Experimental results

  18. Experimental results

  19. Experimental results

  20. Experimental results

  21. Experimental results

  22. Experimental results

  23. Experimental results (Attack)

  24. Experimental results (Attack)

  25. Experimental results (Attack)

  26. Experimental results (Attack)

  27. Experimental results (Attack)

  28. Experimental results (Attack)

  29. Conclusions To improve accuracy and robustness of the watermark can use: • Employing an error control coding • Multiple embedding techniques

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