Vector map integrity authentication method

A vector map and authentication method technology, applied in the field of geographic information science and information hiding, which can solve the problems of inability to accurately locate the tampered area, insufficient accurate location of the tampered area, and inability to effectively indicate the original position of tampered vertices or primitives.
CN106599727AActive Publication Date: 2017-04-26XUZHOU NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
XUZHOU NORMAL UNIVERSITY
Publication Date
2017-04-26

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Abstract

The invention provides a vector map integrity authentication method. The method comprises the following steps of classifying primitive vertexes; dividing data units; associating the data units; constructing locating information; generating an authentication watermark; embedding the authentication watermark and the locating information; marking primitives; and performing watermark authentication and original data lossless recovery. According to the method, the primitives of a vector map (line or surface) are divided into different data units; the associated data units are allocated to the data units and the locating information of the data units is constructed; the embedding of the authentication watermark and the embedding of the locating information in the associated data units are realized by utilizing a reversible information hiding method; and the data units which the primitives belong to are marked, thereby ensuring accurate locating of the tampered data units and recovery of original data of the non-tampered data units. In addition, original regions of the tampered data units can be accurately located by utilizing the locating information stored in the associated data units of the tampered data units, thereby ensuring reliable application of vector map data.
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Description

technical field

[0001] The invention relates to the fields of geographic information science and information hiding, and specifically relates to a vector map integrity authentication method. Background technique

[0002] With the rapid development of geographic information processing technology and the Internet, vector maps have been widely used in various fields of national economy. Vector maps accurately describe geographic information, but using existing geographic information processing tools and public networks, people can easily and quickly copy, modify, and publish these high-precision vector data. Effectively verifying the integrity and authenticity of vector maps to ensure the reliable application of vector maps has become an urgent problem to be solved.

[0003] Fragile watermarking method for vector maps is an effective method for authenticating data integrity. At present, there have been some important research results on fragile watermarking algorithms for vec...

Claims

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