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Image Adaptive Watermarking Using Wavelet Domain Singular Value Decomposition

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Image Adaptive Watermarking Using Wavelet Domain Singular Value Decomposition Source: Circuits and Systems for Video Technology, IEEE Transactions on, Volume: 15 ... – PowerPoint PPT presentation

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Title: Image Adaptive Watermarking Using Wavelet Domain Singular Value Decomposition


1
Image Adaptive Watermarking Using Wavelet Domain
Singular Value Decomposition
  • Source Circuits and Systems for Video
    Technology,
  • IEEE Transactions on, Volume
    15, Issue 1,
  • Jan. 2005, Pages 96 102.
  • Author Paul Bao and Xiaohu Ma
  • Sperker Wei-Liang Tai
  • Date 2005/2/17

2
Outline
  • Introduction to Watermarking
  • Introduction to SVD
  • Introduction to Wavelet
  • The Proposed Method
  • Experimental Results
  • Conclusions

3
Introduction to Watermarking
  • Invisible Watermarking
  • Robust Watermarking
  • It can against image processing such as
    filtering, lossy compression, sharpening, and so
    on.
  • Fragile Watermarking
  • It can detect any tiny alteration to the pixel
    value.
  • Semi-fragile Watermarking
  • It is moderately robust to lossy compression such
    as JPEG.

4
Introduction SVD
Singular Value Decomposition
U and V are both orthogonal, UUTI, VVTI
Energy
5
(No Transcript)
6
Introduction to Wavelet
Haar Wavelet Transform
Phase 1) Horizontal
? ? ? ?
? ? ? ?
? ? ? ?
? ? ? ?
A B C D
E F G H
I J K L
M N O P
AB CD A-B C-D
EF GH E-F G-H
IJ KL I-J K-L
MN OP M-N O-P
Phase 2) Vertical
? ? ? ?
? ? ? ?
? ? ? ?
? ? ? ?
?? ?? ?? ??
?? ?? ?? ??
?-? ?-? ?-? ?-?
?-? ?-? ?-? ?-?
7
The Proposed Method
Wavelet coefficient
V (21, 7, 4, 2)
326 -38 6 19
16 -32 2 -7
2 -3 4 1
-10 5 -2 -9
D k 2
B0, SS112
21 0 0 0
0 7 0 0
0 0 4 0
0 0 0 2
8
Experimental Results
9
Experimental Results (Cont.)
10
Conclusions
  • A semi-fragile watermarking for image
    authentication is proposed.
  • Possess an excellent robustness to JPEG
    compression and a fragility to various image
    manipulation.
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