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WATERMARKING

WATERMARKING. Adviser ： 葉家宏 老師 Presenter ：邱怡雯 Date : 2011/03/28. Outline. Embed method Gray level logo Binary logo Result Gray level logo Binary logo Conclusion. Embed method(1/2). Spatial domain watermarking Gray level logo Embed 4 bits. Watermarked image.

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WATERMARKING

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  1. WATERMARKING Adviser ：葉家宏 老師Presenter ：邱怡雯 Date:2011/03/28

  2. Outline • Embed method • Gray level logo • Binary logo • Result • Gray level logo • Binary logo • Conclusion

  3. Embed method(1/2) • Spatial domain watermarking • Gray level logo • Embed 4 bits Watermarked image Original image Watermark extraction Extract directly Add 5%~20% noise Save the image as JPEG file and choose different quality Watermark

  4. Embed method(2/2) • Spatial domain watermarking • Binary logo Watermarked image Original image Watermark extraction Extract directly Add 5%~20% noise Save the image as JPEG file and choose different quality Watermark

  5. Result-gray level logo(1/7) Embed 4 bit to bit plane 7,6,5 and 4 (A) bit plane 7 (B) bit plane 6 (C) bit plane 5 (D) bit plane 4 (A) bit plane 7 (B) bit plane 6 (C) bit plane 5 (D) bit plane 4

  6. Result-gray level logo(2/7) PSNR curve with embed the watermarking in different bit plane

  7. Result-gray level logo(3/7) Add noise(use PS) to bit plane 5 which embed 4 bits (A)5% (B)10% (C)15% (D)20% (A)5% (B)10% (C)15% (D)20%

  8. Result-gray level logo(4/7) Add noise to bit plane 5 which embed 4 bits (A)5% (B)10% (C)15% (D)20% (A)5% (B)10% (C)15% (D)20%

  9. Result-gray level logo(5/7) Compress .raw into different quality Bit plane 5 which embed 4 bits (A)10% (B)30% (C)50% (D)70%

  10. Result-binary logo(6/7) Embed binary logo to bit plane 7,6,5 and 4 (A) bit plane 7 (B) bit plane 6 (C) bit plane 5 (D) bit plane 4

  11. Result-binary logo(7/7) Add noise to bit plane 5 and 4 Plane 5 (A)5% (B)10% (C)15% (D)20% Plane 4

  12. Conclusion • Embed bits to high bit plane are more robust but lower PSNR

  13. THE END

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