Dissertation > Excellent graduate degree dissertation topics show

Research on Digital Watermark Available for Printed Images

Author: ZhangLiQiang
Tutor: TanJiChun
School: National University of Defense Science and Technology
Course: Optical Engineering
Keywords: anti-counterfeiting watermarking discrete Fourier transform fractional Fourier transform discrete cosine transform halftone information hiding
CLC: TP309
Type: Master's thesis
Year: 2005
Downloads: 255
Quote: 5
Read: Download Dissertation

Abstract


In this paper, digital watermarking available for printed images is researched. It is concrete to study the contents as follows:1. The distortion introduced by print/scan process to images is discussed. According to the result, robustness of already proposed algorithms is analysised.2. An algorithm resistant to print/scan process is proposed, which is based on block discrete Fourier transform. New algorithm is more robust than already proposed algorithms.3. An algorithm based on fractional Fourier transform (FFT) is proposed, which is available for printed images. The FFT order is required as a key in detection. And its changeability makes the encrypted images more difficult to be counterfeited.4. An overview of already proposed watermarking algorithms for halftone images is given. Four algorithms among them are compared with each other. The result of comparison demonstrates that different algorithm has different advantage and disadvantage, which algorithm to be adopted can be decided according to practice demand.

Related Dissertations

  1. Analysis of Spread Spectrum Signals Based on FRFT,TN911.6
  2. The Research of Vector CAD Electronic Drawing Protection System,TP391.72
  3. Research on the Application of Image Information Hiding Technique,TP309.7
  4. The Design and Implement of Highway Capture with Digital Watermarking Application,TP311.52
  5. Research and Realization on Video Watermarking Techniques,TP309.7
  6. The Watermarking Technology Research of Raster Digital Maps Resisting Cropping Attacks,TP309.7
  7. Research of Merchandise Anti-counterfeiting Technology Based on RFID-tag,TP391.44
  8. The Study of Digital Raster Map Watermarking Based on Wavelet Analysis,TP309.7
  9. Digital Watermark Algorithm Based on Wavelet Transfomation,TP309.7
  10. Research on the Approaches of Digital Audio Watermarking,TP309.7
  11. Ant Colony Algorithm with Its Application to Digital Watermarking,TP18
  12. The Research of Steganography Based on Domain of DCT,TP393.08
  13. Design and Realization for Binary Document Image Authentication,TP391.41
  14. The Research of Information Hiding Based on Chaos and Wavelet Domain,TP391.41
  15. Compressed Domain Fragile Video Watermarking,TN919.81
  16. Research and Application on Intellectual Property Protection Methods of Witkey,TP393.08
  17. Design and implementation of the image copyright protection system based on digital watermarking,TP309.7
  18. Digital Watermarking for Image Processing Algorithm Research and Simulation,TP309.7
  19. DCT Image Digital Watermarking Algorithm Based on Human Visual System,TP309.7
  20. Research of Color Image Digital Watermarking Algorithm Based on DWT,TP309.7
  21. Fragile watermarking algorithm based on image characteristics of high security,TP309.7

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