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Embedding method and detection method of vector map watermark based on virtual circle

A vector map and watermark embedding technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of vector map data being easily copied illegally, reverse cracked original data, lossless recovery, etc., to get rid of vector map data Dependence on organizational form, solving the problem of watermark positioning, and the effect of resisting geometric attacks

Active Publication Date: 2015-10-07
菏泽建数智能科技有限公司
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Problems solved by technology

[0004] In order to overcome the shortcomings of existing vector map data that are easy to be illegally copied, reversely cracked, and original data are restored without loss, the present invention provides a method that can effectively solve the problems of vector map data being illegally copied, reversely cracked, and original data without loss. Watermark embedding method and extraction method of vector map based on virtual circle

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  • Embedding method and detection method of vector map watermark based on virtual circle
  • Embedding method and detection method of vector map watermark based on virtual circle
  • Embedding method and detection method of vector map watermark based on virtual circle

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] refer to Figure 1~Figure 10 , a virtual circle-based vector map watermark embedding method, comprising the following steps:

[0049] (1) figure 1 It is the specific steps to design a virtual circular watermark logo with identification significance:

[0050] (1.1) Determine the reference radius of the virtual circle, whose main identification feature is the radius γ of the virtual circle (0≤γ);

[0051] (1.2), define a set of watermark information embedding concentric circle group radius γ n (0≤γ n );

[0052] (1.3), define the center coordinates (X, Y) of the virtual circle;

[0053] (1.4), for the coordinates of the center of the circle (X, Y), the radius of the concentric circle group γ n (0≤γ n ) This series of variables can design a specific virtual circle group with identification significance, and this virtual circle group contains related waterm...

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Abstract

The invention discloses a vector map watermark embedding method based on a virtual circle. The method includes that step one, a virtual circular sign with a marking meaning is designed; step two, the embedding of feature points is performed; step three, the embedding of a virtual circle vector map watermark is performed, whether an intersection point exists between a coordinate sequence with more than two peaks in vector map data and each virtual circle in a group of virtual concentric circles or not is detected, and if the intersection point exists, the related intersection point is inserted into the coordinate sequence according to a feature point embedding strategy of an algorithm thought. The invention further provides a vector map watermark detecting method based on the virtual circle. According to the vector map watermark embedding method and the vector map watermark detection method based on the virtual circle, the problems that the vector map data is illegally copied and reversely broken and original data can not be restored in an undamaged mode are effectively solved.

Description

technical field [0001] The invention belongs to the field of copyright protection of vector map data in geographic information systems, and in particular relates to a robust watermark embedding method and detection method based on overall vector map data. Background technique [0002] With the development and popularization of computer technology and the Internet, as well as the advancement of multimedia data storage and transmission technology, the transmission and sharing of digital products has become very easy, and the illegal copying of digital products has also become very easy, which brings a A series of questions about copyright. In order to protect the interests of copyright owners, it is urgent to find an effective method to protect the intellectual property rights of digital products. [0003] The vector map data watermarking algorithm is different from the traditional image-based watermarking algorithm. This is mainly because the map data does not have the unive...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 朱文忠李岩叶露涵朱龙泽
Owner 菏泽建数智能科技有限公司
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