Digital watermarking protection method of two-dimensional vector graph based on canonical correlation analysis

Abstract

The invention relates to a digital watermarking protection method of a two-dimensional vector graph based on canonical correlation analysis. The digital watermarking protection method is based on the analysis of the shortcomings of the existing vector graph watermarking algorithm on the anti-attack aspect and introduces the canonical correlation analysis into the digital watermarking technology according to the characteristics of the canonical correlation analysis. The digital watermarking protection method comprises two implementation steps: the proposal of utilizing the DFT domain algorithmfor embedding a watermarking on a canonical correlation variable obtained through the canonical correlation analysis is adopted during the embedding stage of the watermarking; when at the stage of detection, the correlation detection is carried out on the watermarking according to the affine invariant feature and the statistical feature of the canonical correlation variable obtained by the canonical correlation analysis, and the determination of whether the watermarking is contained or not is finally carried out. The method can resist various geometric attacks, noise-adding filtration, and starting point changing and the compressive attack thereof.

Description

technical field [0001] The invention relates to a method for applying CCA (Canonical Correlation Analysis) to digital watermark protection of 2-dimensional vector graphics, and belongs to the field of information security protection. Background technique [0002] The application of digital watermark technology provides a more secure advantage for the release and dissemination of vector graphics on the Internet. At present, the digital watermarking of 2D vector graphics is mainly to embed the watermark by modifying the outline of the vector graphics. Each watermarking algorithm has its own advantages and disadvantages. According to the different embedding position of watermark, it is mainly divided into spatial domain and transform domain watermarking methods. [0003] 1. Spatial domain method: It is to embed watermark information by directly modifying the coordinate values ​​of the contour vertices, mainly to effectively use the positional relationship of the vertices or t...

AI Technical Summary

Problems solved by technology

The transform domain method has relatively good robustness, but some algorithms are more complicated to implement, and the ability to resist affine attacks of vector graphics is poor

As for other transform domain methods, they belong to non-mainstream schemes, the depth of research is relatively shallow, and they have great limitations

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