Dissertation > Excellent graduate degree dissertation topics show

The Research of Engineering Drawing Digital Watermark

Author: ZengYongQiang
Tutor: ZhaoJianJun；ChenYongFu
School: Huazhong University of Science and Technology
Course: Digital design and manufacturing
Keywords: 2D drawings Digital Watermarking Watermark embedding Watermark detection
CLC: TP309.7
Type: Master's thesis
Year: 2007
Downloads: 57
Quote: 0
Read: Download Dissertation

Abstract


The drawing is one of the most important design information carrier copyright protection issues are universal attention. This paper studies digital watermark technology of two-dimensional drawing graphics file, the digital watermark embedding specific 2D CAD files, detect and Print algorithms provide an effective means for copyright protection of the drawing. According to the characteristics of the two-dimensional drawing graphics data, the paper proposes a method to obtain redundant information through the entity's random perturbations, so that randomness has good statistical properties, the introduction of a pseudo-random number generator. Then embedding method most commonly used 2D CAD files straight line, circle, polyline entities were introduced random perturbations of these entities to obtain redundant information, and then digital watermark intensity factor and the watermark sequence to the line or nonlinear effect on the redundant information can be obtained by adjusting the intensity factor and the mode of action with good transparency and robustness of the watermark. The digital watermark detection algorithm is to use non-blind detection algorithm will need to enter the the drawing embedded watermark and not embedded watermark original drawing, drawing embedded watermark by the two drawings entity information extract the watermark sequence. Detection algorithm, also proposed an effective means to resist the entity to delete and add attack. The last watermark sequence is generated by using random numbers to determine the maximum threshold value, to thereby obtain the determination threshold value by determining the threshold value can effectively determine whether the watermark information. Under Windows2000 printer device driver architecture, as well as the printing process, the paper proposes to use the printer driver to print the watermark embedded watermark background technology. The first the above watermark detection technology will be embedded in the drawing of the enterprise information extracted, and then initialize the printing equipment, enterprise information after initialization is complete, it will be added as a watermark background to the drawing you want to print. The role technology can play a good warning statement copyright has good versatility and practicality. Visual C 6.0 development environment using OpenDWG Toolkit development package to achieve a two-dimensional drawing watermark embedding and detection technology. Experimental results show that these two techniques for geometric attacks such as translation, rotation, zoom, delete, and add, good robustness, and experimentally determined the watermark embedding and detection technology to determine threshold. With VC6.0 development environment using the Windows DDK development kit to achieve the two-dimensional drawings watermark printing technology, demonstrated the technology has a good effect. On a two-dimensional drawing digital watermarking technology has just now in its infancy, the robustness of the algorithm is to be strengthened, while the combination of digital watermarking technology and encryption technology will be able to better address enterprise information security problems.

Related Dissertations

  1. Research on Contourlet Transform and Its Application on Image Processing,TP391.41
  2. Protection for critical electronic document grouping anti-collusion digital fingerprinting algorithm,TP309.7
  3. Chaotic systems based digital image watermarking algorithm,TP309.7
  4. SVD -based digital watermarking algorithm,TP309.7
  5. Research of Digital Watermarking Technique in Transform Domain,TP309.7
  6. The Office Automation Work System Key Technologies Based on the ASP.NET the Research,TP317.1
  7. Research of Digital Image Watermarking Techniques,TP309.7
  8. Image Authentication Algorithm Based on Momentinvariant of Histogram and SVD,TP391.41
  9. Research on Robust Image Watermarking Technology in Transform Domain,TP309.7
  10. Science and Research Information Management System of TJAU,TP311.52
  11. Research on Security Policy in Wireless Sensor Networks Based on Digital Watermarking Technology,TN915.08
  12. A Digital Watermarking Scheme Based on Texture Measures in Multi-wavelet Domain,TP309.7
  13. Color image digital watermarking technology research,TP309.7
  14. Research on Watermarking Algorithm of DWT Digital Image Based on Scramble,TP309.7
  15. Research on Digital Watermarking Algorithms of 2D Vector Graphics,TP309
  16. Research on Zero-Watermarking of Chinese Texts Based on Vector Feature,TP309
  17. Application and Research of Watermark Technology Based on the Theory of Modern Password and Quantum Password,TP309.7
  18. A wavelet-based color image with HVS adaptive digital watermarking algorithm,TP309.7
  19. Based on SOPC implementation of digital image watermarking,TP309.7
  20. Combined with dual chaotic systems with digital signature authentication algorithm,TP309.7
  21. Watermarking technique based on military information systems security research,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