文摘
英文文摘
声明
Chapter 1：Introduction
1.1 Introduction
1.2 Wavelet Domain Watermarking and Applications
1.2.1 Invisible Watermarking Concept
1.2.2 Evaluation of the Watermarking Systems
1.2.3 Applications
1.2.4 The Wavelet Transformation
1.3 Current Status of Watermark Research using the Perceptual Criteria
1.4 Thesis Objectives and Outline
Chapter 2：Watermarking and Human Visual System
2.1.Human Eye Characteristics
2.1.1.Sensitivity and Masking
2.2 Building of a Perceptual Mask in the Wavelet Domain
2.3 The Pixel-Wise Masking Model
2.4 The Watermarking Process
2.4.1 The Embedding
2.4.2 The Restoration
2.5 Measures of Watermarking Performance
2.5.1 The Imperceptibility
2.5.2 The Robustness
2.6 Summary
Chapter 3：Improvements of the Texture Activity Measure.
3.1 The Texture Activity Measure
3.2 Motivations of Improvements and Suggestions
3.2.1 The Point Detection Measure
3.2.2 The Line Detection Measure
3.2.3 The Gradient Model
3.3 Basic Tests of the Proposed Improvements
3.3.1 The Masks
3.3.2 Simulation Results
3.4 Discussions
3.5 Summary
Chapter 4：Adjustment and Tests of the Proposed Measures
4.1 Adjustment Method
4.1.1 Principle of the Measure Adjustment
4.1.2 Research of β values
4.1.3 Selection of a β values for the Mask Computation
4.2 Robustness Tests of the New Measures
4.2.1 Computation of β
4.2.2 Results before Attacks
4.2.3 JPEG Compression
4.2.4 Noise Addition
4.2.5 Median Filtering
4.3 Discussions and Further Improvement
4.3.1 Possible Solution
4.4 Summary
Chapter 5：Conclusion and Future Directions
5.1 Summary and Contributions
5.2 Future Directions
Acknowledgements
Appendix A：List of figures
References
Publication
西南交通大学;
