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Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data

A remote sensing data and digital watermarking technology, which is applied in the fields of electrical digital data processing, image data processing, image data processing, etc., can solve problems such as difficult to resist splicing attacks, unable to solve watermark information synchronization, unable to effectively protect the copyright of tile remote sensing data, etc. , to achieve the effect of improving the anti-attack ability and strong robustness

Inactive Publication Date: 2014-07-30
NANJING NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to convert the text watermark information representing the copyright into a binary sequence and embed into the data

Method used

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  • Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data
  • Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data
  • Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data

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Embodiment Construction

[0037] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0038] In this embodiment, three-band tile remote sensing data is selected as experimental data. For the entire process of data reading, preprocessing, watermark information generation, watermark embedding, watermark data storage, image block search, watermark detection, and detection result output, An embodiment of the present invention is given to further describe the present invention in detail.

[0039] Such as Figure 4 In this embodiment, a piece of tile remote sensing data is selected as the experimental data, the data size is 256×256, and the data format is png.

[0040] 1. Watermark information generation:

[0041] Step 1: Input text information to be embedded. The watermark information in this embodiment is: Jiyin watermark, such as Figure 5 Shown.

[0042] Step 2: Use the text encoding mechanism to encode the input text information to generate a binary se...

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Abstract

The invention discloses a copyright protecting method based on a digital watermark technology and aiming at tile remote sensing data, and belongs to the technical field of geographic information copyright protection. The method provided by the invention is used for analyzing on the basis of tile remote sensing data characteristics and requirements of the tile remote sensing data characteristics to copyright protection, after splicing, the watermark-containing remote sensing data is prevented from losing watermark information, only a coordinate position is changed, and synchronous relation between initial data and the watermark information can be effectively ensured by built watermark embedding rules. During watermark detection, a quadtree search mechanism is adopted for quickly and accurately positioning an image block containing the watermark information, and watermark information extraction is performed in the image block. In the method, the characteristics of a digital number of the tile remote sensing data before and after splicing can be fully used, correct extraction to the watermark information after splicing is ensured, the robustness of a watermarking algorithm can be improved greatly, the problem that tile data cannot resist splicing attack in the prior art can be solved, and tile data copyright can be effectively protected.

Description

Technical field [0001] The invention belongs to the field of geographic information copyright protection, and specifically relates to a digital watermarking method adopting quadtree method for tile remote sensing image data, so as to improve the anti-splicing ability of the remote sensing image digital watermarking algorithm and realize the copyright protection of tile remote sensing data. Background technique [0002] With the development of network technology, the application of geographic data has become more widely used. Many websites such as Baidu and Google provide electronic map services, especially the popularization of geographic data publishing software represented by Google Earth, which has greatly promoted the geographic information industry. development of. my country is also vigorously developing network geographic information services. The National Bureau of Surveying, Mapping and Geographic Information has developed the "Sky Map" website in conjunction with variou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/10G06F21/16G06T1/00
CPCG06F21/16G06F21/1063
Inventor 任娜朱长青佟德宇
Owner NANJING NORMAL UNIVERSITY
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