Digital watermarking system based on continuous vector graphics and implementation method of digital watermarking system based on continuous vector graphics

Abstract

The invention discloses a digital watermarking system based on continuous vector graphics and an implementation method of the digital watermarking system based on the continuous vector graphics. The digital watermarking system comprises a digital watermark generating end and a digital watermark checking end; the digital watermark generating end comprises a digital watermark generating end communication module, a to-be-processed vector graphics set queue module, a watermark value code stream generating module, a watermark value code stream sequence module, a digital watermark adding module, a to-be-sent vector graphics set queue module, a watermark data storage at the generating end and a time sequence data generating module; and the digital watermark checking end comprises a digital watermark checking end communicating module, a received vector graphics set queue module, a digital watermark information extraction module, an extraction code stream storage module, a digital watermark checking module and a watermark data storage at the checking end. According to the invention, digital watermarks can be embedded and checked in an extremely simple vector graphics; and the digital watermarking system has large embedded data quantity, is simple to implement and can be adopted to realize multiple digital watermarkes.

Description

technical field [0001] The invention belongs to a system and method for realizing digital watermark applied in computer information security, network communication identification and authentication, digital copyright protection and management, in particular to a system and method for realizing digital watermark in continuous vector graphics. Background technique [0002] Digital watermarking (Digital Watermarking) technology is to embed some identification information (ie, digital watermark) directly into digital carriers (including multimedia, documents, software, etc.) or indirect representation of data (modify the structure of a specific area), without affecting the original carrier The use value of the watermark is not easy to be detected and modified again, but it can be identified and identified by the watermark producer (or other parties cooperating with the producer). Through the information hidden in the carrier, the purpose of confirming content creators, buyers, t...

AI Technical Summary

Problems solved by technology

However, due to the extremely small amount of data required to describe vector graphics, this advantage brings two disadvantages: it is difficult to add digital watermarks to a very small amount of vector graphics data without being discovered (the concealment of digital watermarks is its common feature) ; Cannot provide enough data redundancy to protect digital watermark data from being tampered and forged

[0015] In the current literature and patents, there is no good solution to the technical problem of adding digital watermarks to a very small amount of vector graphics data without being discovered:

However, this solution is for static vector graphics, and it is impossible to add digital watermarks to minimalist vector graphics (for example, only one vector graphics element, such as a circle or a rectangle)

[0017] 中国专利(申请号200810026405.7、200710054817.7、200810035218.5、200810203997.5、200810236953.2、200810209637.6、200810236952.8、200910032921.5、200910071879.8、200910234944.4、201010158251.4、201010158243.X、201010170465.3、201010548741.5)公开了几种面向空间 / 地理信息数据的矢量图数字水印 method, the main method is based on the modification of attributes such as vertices and statistical grayscale, but these patents are all methods for static vector graphics, and the amount of embedded data is small, so it cannot be used for minimalist vector graphics (for example, only one vector graphics element, such as a circle or a rectangle) to add a digital watermark

However, its disadvantages include: the scope of application is limited to the method of embedding and extracting fragile watermarks in video data based on H.264, and only fragile watermarks can be realized; the invention is to embed watermarks in additional information in video coding, Protected video frames instead of vector graphics data; its watermark mechanism is not aimed at embedding continuous code streams in continuous vector graphics, and transmitting digital watermarks by complete code streams

[0021] The existing digital watermark implementation scheme for single vector graphics has another disadvantage: the current digital watermark implementation scheme for vector graphics is mainly based on coordinate modification, which can easily cause deformation and distortion of the original image

On the one hand, the display effect of the original image is affected, and on the other hand, it is easy to expose the digital watermark embedded in the vector image

The reason is still that the amount of data in the vector map is too small. Apart from modifying the coordinates, it is difficult to find enough space to embed the watermark data in other aspects.

[0022] This situation makes digital watermarking of vector graphics difficult to realize and is applied in the fields of computer, network communication, information security and copyright protection of digital media art products, etc.

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