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Vector map copyright protection method based on non-linear transformation

A non-linear transformation, vector map technology, applied in the fields of information hiding and geographic information science, can solve the problems of illegal copying of digital vector maps, lossless recovery of original data, etc., to achieve the effect of protecting copyright and eliminating the risk of being copied and stolen

Inactive Publication Date: 2010-09-22
HARBIN ENG UNIV
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Problems solved by technology

[0018] The purpose of the present invention is to provide a vector map copyright protection method based on nonlinear transformation that can effectively solve the problems of digital vector maps being illegally copied, reversely deciphered, and original data restored without loss

Method used

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  • Vector map copyright protection method based on non-linear transformation
  • Vector map copyright protection method based on non-linear transformation
  • Vector map copyright protection method based on non-linear transformation

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Embodiment Construction

[0061] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0062] like figure 1 As shown, the present invention is based on the vector map copyright protection method flowchart of nonlinear transformation, and this method is generally divided into three aspects: A, vector map nonlinear transformation algorithm; B, vector map data recovery algorithm; C, the realization of safe container .

[0063] A. Vector map non-linear transformation algorithm, the steps are as follows:

[0064] (1) Generate copyright information and watermark information;

[0065] like figure 2 As shown, use the copyright information processing interface to generate copyright information according to personalized information such as user signature and date, and use the information-digest algorithm (MD5) to generate a message digest that can uniquely identify the copyright information and whose length is fixed at 128 bits. Message digest as waterma...

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Abstract

The invention provides a vector map copyright protection method based on non-linear transformation. The method comprises the following steps: generating copyright information and watermarking information; dividing the watermarking information to be embedded; generating non-linear transformation parameter; performing non-linear transformation to a vector map; constituting key information; performing lossless embedding of key information; extracting the key information, restoring the original data of the vector map, judging copyright ownership; designing to realize a safe container with back-up supervisory function. The vector map copyright protection method based on non-linear transformation provided by the invention combines the nondeterministic mathematic model to constitute the nondeterministic mathematic model generator and utilizes the generated normal random parameter to perform non-linear transformation to the vector map; and file filtering drive mechanism is combined to realize the safe container supporting non-linear transformation of the vector map, inverse transformation operation and key embedding and effectively solve the problems that the digital vector map is copied illegally and the lossless recovery of original data is not realized.

Description

technical field [0001] The invention relates to the fields of geographic information science and information hiding. Specifically, it is a vector map copyright protection method based on nonlinear transformation. Background technique [0002] With the gradual realization of "Digital China", the application of spatial information is becoming more and more extensive. Digital vector maps have many excellent performances such as high precision and high-quality scaling, and have become a geographical information system, intelligent transportation system, digital city and digitalization. Support resources necessary for national defense construction and other aspects. At the same time, the high production cost and easy editing of digital vector maps make digital vector maps face a series of data security issues such as copyright protection, source tracking, and tampering identification. Digital watermarking technology is a cutting-edge technology to protect data security develope...

Claims

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Application Information

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IPC IPC(8): G06F21/00G06T1/00G06F21/10
Inventor 门朝光王娜娜曹刘娟李香
Owner HARBIN ENG UNIV
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