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Research on Vector Graphics Digital Watermarking

Author: DingZuo
Tutor: ZuoZhengDing
School: Beijing Jiaotong University
Course: Signal and Information Processing
Keywords: Vector Digital Watermarking Singular Value Decomposition Robustness Difference to expand Reversible Watermarking
CLC: TP309.7
Type: Master's thesis
Year: 2010
Downloads: 109
Quote: 1
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Abstract


The digital watermarking technology is an important branch of information hiding technology embedded in some of the identifying information in digital media information, in order to prove the copyright detection works real integrity, tracking pirated or provide the additional information of the product and other applications. In recent years, digital watermarking technology for a variety of different forms of multimedia data have been a lot of attention and development, especially in the field of raster images, and achieved a certain amount of research. Vector a special file formats like raster images belong to the field of digital image, due to amplified without distortion, small file, and high precision map query, engineering graphics, logos, design and other aspects of the application of increasingly and more. Vector copyright protection is particularly important. Different principles of image the Vector digital watermarking features and evaluation system and raster image digital watermarking also has some differences, but not many watermarking for Vector. This paper first introduces the basic framework of digital watermarking technology, application, classification and performance evaluation, and then describes the characteristics of the Vector, and analysis of the Vector digital watermarking features and research status. Existing Vector digital watermarking theory and technology research based on the study of vector digital watermark in different application environments, the main content of the work and results are as follows: (1) the application of copyright protection for Vector vector watermarking algorithm based on singular value decomposition. Copyright protection, high robustness of the watermark algorithm This article presents a new Vector pretreatment method, combined with the singular value decomposition of the matrix of tiny disturbance stability proposed a resistance Vector attack better the robustness watermark algorithm; (2) In some applications, the higher accuracy requirements of the vector, the error introduced by the watermark embedding are not allowed for this application environment, based on the difference expand and pan reversible watermarking algorithm. Based on the difference between expanding algorithm, be grouped in the vertex coordinates, the difference between the apex of the expanded conditions not satisfied difference embedded watermark, the watermark embedding capacity of the large degree of improvement. The experiments show that the algorithm can correctly verify the vector image coordinate data integrity, and extract the watermark entirely correct to restore the original coordinate data to meet the requirements. (3) This paper presents two watermarking algorithm design ideas and algorithms performance compared to discuss the different emphases of the different applications of watermarking algorithm design.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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