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Information disguising and reducing methods suitable for triangulated irregular netting digital elevation model

A digital elevation model and information camouflage technology, which is applied in image data processing, image data processing, program/content distribution protection, etc., can solve the problems of low confusion and low security performance of information protection

Active Publication Date: 2015-10-28
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide an information camouflage and restoration method suitable for irregular triangulation digital elevation models, so as to solve the problems of low security performance and low confusion of current irregular triangulation digital elevation models

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  • Information disguising and reducing methods suitable for triangulated irregular netting digital elevation model
  • Information disguising and reducing methods suitable for triangulated irregular netting digital elevation model
  • Information disguising and reducing methods suitable for triangulated irregular netting digital elevation model

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Embodiment Construction

[0055] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0056] Embodiment of the information camouflage method suitable for irregular triangulation digital elevation model of the present invention

[0057] In this embodiment, a piece of TIN DEM data containing 853 discrete elevation points is used as the information to be camouflaged. The experimental conditions are Intel Core i3 CPU, 2.94GHz, memory 2G, and graphics card cache 256M. In order to realize the information camouflage of the above data, the present invention first uses the Tent chaotic map to scramble the data in the frequency domain, and then uses the Chinese remainder theorem to perform numerical substitution in the space domain to jointly complete the information camouflage, as figure 1 shown. The specific implementation steps are as follows:

[0058] 1. Normalize the elevation data of the TIN model

[0059] The distribution of ...

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Abstract

The invention relates to information disguising and reducing methods suitable for a triangulated irregular netting digital elevation model, and belongs to the technical field of digital elevation data processing. The information disguising method mainly comprises space scrambling and numerical value substitution, wherein the space scrambling is implemented through a Tent chaotic mapping way; and the numerical value substitution is carried out through a Chinese remainder theorem. Compared with a conventional information protection method, the information disguising and reducing method has the advantages that information protection is carried out through the information disguising way, so that the advantages of high confusion and high security performance are realized; security protection can be provided for important elevation information in the triangulated irregular netting digital elevation model; and the storage and transmission of data in the triangulated irregular netting digital elevation model can be effectively ensured.

Description

technical field [0001] The invention relates to an information camouflage and restoration method suitable for an irregular triangulation digital elevation model, belonging to the technical field of digital elevation data processing. Background technique [0002] Triangulated Irregular Netting (TIN) is an important form of digital elevation model (Digital Elevation Model, DEM). By connecting discrete elevation sampling points, the terrain is expressed as non-overlapping continuous triangular surfaces. It is especially suitable for high-precision terrain modeling and simulation, and is widely used in national defense and economic fields. [0003] Data sharing is an important symbol of the information age. At present, users can download elevation data of different precision in most parts of the world in an open network environment, but high-precision data in key areas, especially these areas, still have important protection value . For example, the United States shares the 90...

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Application Information

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IPC IPC(8): G06T1/00G06F21/16
Inventor 宋国民贾奋励陈令羽田江鹏孙启松卢瑞林雕段帅智梅霞高云亮
Owner THE PLA INFORMATION ENG UNIV
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