Watermark method of vectorial geographical spatial data based on integral wavelet transforms

A vector geography and spatial data technology, applied in the field of cartography and geographic information science, can solve the problems of the lack of robustness and practicability of the watermarking algorithm of vector geospatial data itself, and achieve good imperceptible characteristics and strong robustness. , good stability
CN101093574AInactive Publication Date: 2007-12-26THE PLA INFORMATION ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE PLA INFORMATION ENG UNIV
Publication Date
2007-12-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

A vector geographic space data watermarking-method based on integer wavelet transform includes fetching original vector geographic space data from mapping databank, enciphering watermark information with chaos sequence, carrying out integer wavelet transform on coordinate string of said geographic space data and embedding watermark information into low frequency coefficient of wavelet transform; picking up watermark information by comparing wavelet coefficient mutual relation of data string to be tested to original reference data string when watermark is required to be picked up.
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Description

1. Technical field

[0001] The invention relates to the fields of cartography and geographic information science, in particular to a watermarking method for vector geospatial data based on integer wavelet transform. 2. Background technology

[0002] Geospatial data is the supporting achievement of national infrastructure construction and earth science research. It plays a very important role in national economy and national defense construction. Its security involves national security, scientific and technological cooperation and intellectual property rights. Currently, there is an urgent need for reliable technologies to secure geospatial data.

[0003] Digital watermark technology is a cutting-edge technology of information security developed with the process of digitization. It embeds secret watermark information in source data, combines watermark and source data closely and hides it, and becomes an inseparable part of source data. This is used to identify copyright owner...

Claims

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