A copyright authentication method of gis vector data line surface layer
A copyright authentication and vector data technology, applied in the field of geographic information security, can solve the problems of GIS vector data data distortion, algorithm robustness is difficult to satisfy copyright protection, copyright authentication powerlessness and other problems
Active Publication Date: 2016-08-17
南京泛在地理信息产业研究院有限公司
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although a single copyright mark technology can be used for copyright authentication such as tampering prompts, manufacturer identification and traitor tracking of GIS vector data, it has the following two shortcomings: 1) The copyright mark embedded in GIS vector data products is easy to be Its manipulation software--GIS software's coordinate transformation, projection transformation, rotation, zoom-in, zoom-out and other operations are erased, and the robustness of the algorithm is difficult to meet the needs of copyright protection; 2) The embedding of copyright marks will cause GIS vector data data certain distortion
[0003] Facing the massive characteristics and high-fidelity requirements of GIS vector data, copyright certification based on traditional copyright marking algorithms is becoming more and more powerless
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] Further detailed description will be given below in conjunction with the accompanying drawings and embodiments.
[0041] This example selects a typical shp surface layer data, and further describes the present invention in detail for the entire process of data reading, copyright mark generation, copyright mark extraction and authentication. In this embodiment, the 1:4 million linear layer data of the water system in the United States (such as figure 1 ) as experimental data. The key value is "10010101", and the authentication threshold is 0.85.
[0042] (1) Copyright mark generation process.
[0043] Step 1: Open the US 1:4 million water system layer data file, the data format is linear data, and the key value is "10010101".
[0044] Step 2: Set the number of azimuth groups to 24, then divide the azimuth space of 0-360 into s={(15*i, 15*(i+1)]|i=0,1,...,24 )} and other 24 intervals.
[0045] Step 3: Set an integer array Angle with a length of 24, and assign the ini...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a copyright authentication method of a GIS vector data line surface layer, which includes a copyright mark generation process and a copyright mark extraction and certification process. The present invention mainly aims at the characteristics of the feature of geographic elements in GIS vector data being stable and not vulnerable to attacks, and the zero watermark utilizes the important features of the original work to construct the original watermark signal instead of modifying these features. Based on the zero watermark of GIS vector data copyright authentication, it better solves the contradiction between the imperceptibility and robustness of GIS vector data watermark. The copyright authentication method of the present invention can effectively resist various attacks such as data editing, data clipping, geometric transformation, etc., has high robustness, and will not cause any impact on data quality.
Description
technical field [0001] The invention belongs to the field of geographic information security, and in particular relates to a method for constructing a zero watermark according to the direction characteristics of geographic elements in a line-surface layer and performing copyright authentication of GIS vector data on the basis. Background technique [0002] At present, various algorithms for copyright authentication of GIS vector data products have been proposed, and certain copyright protection systems have appeared. However, various copyright marking attack methods have exposed the weaknesses of the current algorithms. Although a single copyright mark technology can be used for copyright authentication such as tampering prompts, manufacturer identification and traitor tracking of GIS vector data, it has the following two shortcomings: 1) The copyright mark embedded in GIS vector data products is easy to be Its manipulation software--GIS software's coordinate transformation,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/16
CPCG06F21/16G06F21/1063
Inventor 李安波闾国年
Owner 南京泛在地理信息产业研究院有限公司