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

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

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

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

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

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

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

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

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

10. Frequency Domain Watermarking
Hide position
Binary data
Frequency domain

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

12. Experimental Result (DCT)
Original
After data hiding
PSNR 43.18

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

14. Thank you for your listening