Report

WATERMARKING Adviser ：葉家宏 老師 Presenter ：邱怡雯 Date : 2011/03/28 Outline Embed method Result Gray level logo Binary logo Gray level logo Binary logo Conclusion Embed method(1/2) Spatial domain watermarking Gray level logo Embed 4 bits Original image Watermarked image Extract directly Add 5%~20% noise Save the image as JPEG file and choose different quality Watermark Watermark extraction Embed method(2/2) Spatial domain watermarking Binary logo Original image Watermarked image Extract directly Add 5%~20% noise Save the image as JPEG file and choose different quality Watermark Watermark extraction Result-gray level logo(1/7) Embed 4 bit to bit plane 7,6,5 and 4 (A) bit plane 7 (A) bit plane 7 (B) bit plane 6 (B) bit plane 6 (C) bit plane 5 (C) bit plane 5 (D) bit plane 4 (D) bit plane 4 Result-gray level logo(2/7) PSNR curve with embed the watermarking in different bit plane 45 40 PSNR Embed1bit 35 Embed2bit 30 Embed4bit 25 20 15 10 4 4.5 5 5.5 Bit plane 6 6.5 7 7.5 Result-gray level logo(3/7) Add noise(use PS) to bit plane 5 which embed 4 bits (A)5% (A)5% (B)10% (B)10% (C)15% (C)15% (D)20% (D)20% Result-gray level logo(4/7) Add noise to bit plane 5 which embed 4 bits (A)5% (A)5% (B)10% (B)10% (C)15% (C)15% (D)20% (D)20% 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% 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 Result-binary logo(7/7) Add noise to bit plane 5 and 4 Plane 5 Plane 4 (A)5% (B)10% (C)15% (D)20% Conclusion Embed bits to high bit plane are more robust but lower PSNR THE END