Dissertation > Excellent graduate degree dissertation topics show

Research of Static Image Watermarking Algorithm Based on Wavelet Domain

Author: YangFaKe
Tutor: ZhengQiuMei
School: China University of Petroleum
Course: Applied Computer Technology
Keywords: Digital Watermarking Robustness Wavelet Transform Chaos Block energy Relationship
CLC: TP309.7
Type: Master's thesis
Year: 2008
Downloads: 72
Quote: 3
Read: Download Dissertation

Abstract


With the network technology , the rapid development and wide application of multimedia technology , digital multimedia information can be convenient communication and transaction , which also brought the issue of digital copyright . The digital watermarking technology is the new method , the rise in recent years in the field of information security , copyright protection is an open network environment for copyright protection , authentication source and integrity of the new technology . Wavelet analysis with multi- resolution analysis and multi-scale analysis features , has been widely used in image processing . Wavelet analysis of the contradictions between the watermarking algorithm can better balance the watermark robustness and invisibility . Currently , based on the wavelet domain watermarking algorithm has become a hot topic . This paper first introduces the basic concepts of the development status of the digital watermarking and digital watermarking ; introduction of wavelet theory , introduced the multi-resolution analysis and Mallat algorithm principle of image wavelet decomposition and reconstruction . Secondly, the proposed two improved algorithm based on the wavelet domain watermark . (1 ) digital watermarking based wavelet coefficient block energy analysis improved algorithm : wavelet coefficients wavelet domain block , and further statistical analysis of the sub- block energy selected the maximum energy blocks as watermark information embedding area ; Logistic map pretreatment and after treatment normalized to 0,1 watermark sequences, as the watermark information is directly embedded in the carrier image of the watermark . Balance the conflict between robustness and invisibility algorithm to some extent , has better robustness , strong anti decipher . ( 2 ) based on the relationship of image watermarking Improved Algorithm : The algorithm is based on the second generation wavelet lifting scheme ; Arnold transform pretreatment of the watermark information , based on the size of the relationship of the wavelet coefficients adaptive wavelet decomposition of the embedded watermark carrier image . The algorithm is simple , fast operation , blind watermarking algorithm . The experimental results show that the algorithm has good robustness and invisibility . Conclude this work , pointed out the direction of future research , and the development of the digital watermarking prospected .

Related Dissertations

  1. Feature Extraction, Selection and Combination in Lipreading,TP391.41
  2. Environmental ethics based on the concept of circular economy of tourism research,F590
  3. Development of EST-SSR Primers and Application in Analysis of Genetic Realtionships in Tree Peony,S685.11
  4. A Study on the Relationship between the Spirituality and Self-Consistency of College Students,B844.2
  5. The Research of Chaos M-ary Modulation and Demodulation Method Based on Chaotic Oscillator,TN915.05
  6. The Study of the Relationship between the Party and the Masses from the View of Social Class Divisions,D252
  7. Research on the Construction of Self-class,G424.21
  8. The Research of Influence Factors of Class Management in Secondary Vocational School,G712.4
  9. The Analysis of Parent-child Relationship Impacting on Youth Internet Addiction and Design of Play Therapy Strategy,D669.5
  10. With Delay fishing items and based on the ratio of prey - predator model,O175
  11. A Study on Interpersonal Relationship of Primary Teacher Supporting Rural Education from Urban School,G451.1
  12. Identification and Robustness Analysis of Nonlinear Hybrid Dynamical System Concerning Glycerol Transport Mechanism,TQ223.162
  13. Network transmission ROI image coding algorithm,TN919.81
  14. Philosophical Thinking of Ecological Consumption,X2
  15. Banach space research base and frame disturbance,O177.2
  16. Researches on Watermarking Algorithm and Its Application to Image Software of Electronic Signature,TP309.7
  17. Based on Contourlet Transform Digital Watermarking Method,TP309.7
  18. Image Fusion Algorithms Based on Multi-scale Analysis,TP391.41
  19. Feature Extraction Technologies Research and Implementation of 3D Models Based on Wavelet Transform,TP391.41
  20. Research on Contourlet Transform and Its Application on Image Processing,TP391.41
  21. The Comprehensive Optimization of Hydrodynamic Performance and Structural Characteristics for a High-speed Ship,U661.3

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
© 2012 www.DissertationTopic.Net  Mobile