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

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Presentation transcript:

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 Add 5%~20% noise Save the image as JPEG file and choose different quality Extract directly Original image Watermark Watermarked image Watermark extraction

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

Result-gray level logo(1/7) (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 Embed 4 bit to bit plane 7,6,5 and 4

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

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%

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%

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

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

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

Conclusion  Embed bits to high bit plane are more robust but lower PSNR

THE END