Vector map reversible information hiding method based on LSD planes

A vector map and information hiding technology, which is applied in the field of reversible information hiding of vector maps, can solve the problems of watermark embedding capacity, anti-disturbance, insufficient deformation of watermarked vector map elements, etc.

Inactive Publication Date: 2013-09-25
HARBIN ENG UNIV
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Problems solved by technology

[0004] In summary, although people have proposed some reversible information hiding methods for vector maps, trying to restore the original data while transmitting secret information, to ensure the accurate use of the original data of vector maps, but these methods are limited in watermark embedding capacity, resistance There are still deficiencies in disturbance and deformation of watermarked vector map elements

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  • Vector map reversible information hiding method based on LSD planes
  • Vector map reversible information hiding method based on LSD planes
  • Vector map reversible information hiding method based on LSD planes

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Embodiment Construction

[0056] Vector map primitives (point primitives, line primitives, and surface primitives) are formed by a large number of dense vertices arranged in a specific order. The map data is the 2-dimensional coordinate sequence of these vertices. The present invention proposes a method based on the LSD plane A vector map reversible information hiding method comprises the following steps:

[0057] Step 1: Scan the vertices of the vector map sequentially to obtain the x-coordinate sequence and y-coordinate sequence of the vertices;

[0058] In this step, the vector map vertices are scanned sequentially to obtain the vertex coordinate sequence V,

[0059] V={v j (x j ,y j |j∈[1,n])}

[0060] Among them, v j Denotes the jth vertex in the vertex sequence V, x j and y j Respectively represent the vertex v j The x-coordinate and y-coordinate of , n represents the number of vertices in the sequence V.

[0061] Put X={x j |j∈[1,n]} and Y={y j |j∈[1,n]} are respectively recorded as t...

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Abstract

The invention relates to a vector map reversible information hiding method based on LSD planes. Top points of a vector map are sequentially scanned to obtain x-coordinate sequences and y-coordinate sequences of the top points; scaling positions of the coordinates are moved towards the right side to obtain new coordinate sequences; MSD planes and the LSD planes are calculated; the LSD planes are sequenced according to the ascending sequence to obtain orderly LSD planes; watermarks are embedded in the orderly LSD planes; the coordinate sequences of the orderly LSD planes containing the watermarks are adjusted to obtain LSD planes containing the watermarks; the coordinate sequences containing the watermarks are obtained through calculating; scaling positions of the coordinates in the coordinate sequences containing the watermarks are adjusted; a vector map containing the watermarks is obtained.

Description

technical field [0001] The invention relates to a vector map reversible information hiding method based on LSD plane. Background technique [0002] With the gradual realization of "Digital China", the application of spatial information is becoming more and more extensive. The vector map has many excellent properties such as high precision and high-quality zoom, and has become a geographical information system, intelligent transportation system, digital city and digital national defense. necessary security resources for construction and other aspects. At the same time, the high production cost and easy editing of vector maps make vector maps face a series of data security issues such as copyright protection, source tracking, and tampering identification. Vector map information hiding technology is a cutting-edge technology to effectively protect the security of vector map data. It hides secret information, namely watermarks, in it without affecting the usability of vector ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G09B29/00
Inventor 门朝光王娜娜田泽宇李昌
Owner HARBIN ENG UNIV
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