Dissertation > Excellent graduate degree dissertation topics show

Research of Digital Watermarking Technique in Transform Domain

Author: LeiJie
Tutor: WangHuiQin
School: Xi'an University of Architecture and Technology
Course: Signal and Information Processing
Keywords: Digital watermarking technology Discrete Cosine Transform Singular Value Decomposition Zero watermark
CLC: TP309.7
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
Read: Download Dissertation

Abstract


With the rapid development of computer networks , digital media products to work and life , while convenient , also bring a series of problems in the copyright security . The digital watermarking technology as an effective digital copyright protection method has been widespread concern. Two transform domain watermarking algorithm based on analysis of existing digital watermarking technology : (1) digital watermarking algorithm based on the decomposition of SVD (Singular Value Decomposition) DCT (Discrete Cosine Transform) domain . Sub- blocks of the original image and calculate the entropy value and standard deviation , based on the characteristics of the human visual system , select the larger and smaller variance entropy block embedded watermark . Chaotic encryption binary watermark image on the original image of the selected block discrete cosine transform , singular value decomposition , and then embedded into the selected block singular value decomposition of S component . Since the three watermark embedding , increasing the amount of information of the embedded watermark . The watermark extraction 3 2 . The simulation results show that the algorithm has good imperceptibility , robustness and lossy compression , image add noise , median filtering , image processing operations such as shearing . ( 2 ) based on image normalization zero - watermarking algorithm . The combination of image normalization technique , a new zero - watermarking algorithm . Firstly, the normalized image is extracted in the original image structure area , and then in the important region of the discrete wavelet transform , to select the low - frequency sub-band block discrete cosine transform , extract each block DC component to form a matrix , and an average , by judge each coefficient with the average relationship characteristic information , Finally, the copyright watermark information constructed zero- watermark . Simulation results show that the algorithm has better robustness of conventional processing and geometric attacks .

Related Dissertations

  1. Research on Approaches of the Subjective Automated Assessment,TP391.1
  2. Authorized to play the disc data encryption algorithm,TP309.7
  3. Based on kernel regression and non- local method of image denoising,TP391.41
  4. DCT-based image deblocking High Compression Algorithm,TP391.41
  5. Iris feature -based digital watermarking algorithm,TP309.7
  6. Signal Processing Method Based on Singular Value Decomposition and Its Application to Mechanical Fault Diagnosis,TH165.3
  7. Research on Subspace Analysis Based Face Recognition Algorithm,TP391.41
  8. Study on Digital Image Encryption and Information Hiding Algorithm Based on Chaos,TP309.7
  9. Research on Fault Diagnosis of Gear System Based on Blind Signal Separation,TH165.3
  10. The Application of Gaussian Mixture Model in the Detection of Community Structure of Networks,TP393.094
  11. Error correction coding based on the digital watermark technology research,TP309.7
  12. Research on Blind Detection Based on Image Content,TP391.41
  13. Digital Image Watermarking Algorithm Based on DWT and SVD,TP309.7
  14. Parameters Estimate for a Class of Linear Mixed Models,O212.1
  15. Design and Implementation of Robust Multi-watermarking Algorithm for Digital Image,TP309.7
  16. Research on Information Hiding Algorithm Based on Visual Attention,TP309
  17. Digital Audio Watermarking Algorithm Research,TP309.7
  18. Research on Zero-Watermarking of Chinese Texts Based on Vector Feature,TP309
  19. An Audio Aggregation Watermarking for Copyright Protection and Integrity Authentication,TP309.7
  20. Research of Fragile Digital Watermark Algorithms Based on Image,TP309.7

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