Homework 1 Watermarking Advisor：葉家宏 Presenter：林承洋.

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Presentation transcript:

Homework 1 Watermarking Advisor：葉家宏 Presenter：林承洋

Spatial Domain Watermarking Bits stream of each pixels Bit plane 3 Bit plane 2 Bit plane 1 Bit plane 0

Spatial Domain Watermarking Bit plane 3 PSNR:33.05 Bit plane 2 PSNR:39.11

Spatial Domain Watermarking Bit plane 1 PSNR:45.12 Bit plane 0 PSNR:51.14

Decode With Noise (Photoshop) Add 1% Noise by Photoshop Bit plane 3 Decode Filter

Decode With Noise (Photoshop) Add 3% Noise by Photoshop Bit plane 3 Decode Filter

Experimental Result (bit plane 0) 5% Noise 10% Noise Decode PSNR 28.65 Decode PSNR 25.23

Experimental Result (bit plane 0) 15% Noise 20% Noise Decode PSNR 22.97 Decode PSNR 21.34

Experimental Result (bit plane 4) Compression Quality 3 10 8 5 PSNR 14.38 11.58 10.69 10.03

Frequency Domain Watermarking Hide position Binary data Frequency domain

How to Hide Data Pixel value DCT value 1 Even No change +1 Odd

Experimental Result (DCT) Original After data hiding PSNR 43.18

Experimental Result (DCT) Compression Quality No compression 10 8 Compression Quality 5 3

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