Unlock instant, AI-driven research and patent intelligence for your innovation.
A Digital Watermarking Method for 3D Geographical Models Oriented to Copyright Protection Service
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A digital watermarking and copyright protection technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of being unable to resist model attacks, poor robustness of file attacks, etc., and achieve improved anti-attack capabilities and strong robustness Effect
Active Publication Date: 2016-09-28
NANJING JIYIN INFORMATION TECH
View PDF3 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0008] The purpose of the present invention is to propose a digital watermarking method for 3D geographic model data, so that the attack on the entire 3D geographic model has better robustness
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] In this example, a school model geographical data is selected as the experimental data, and an embodiment of the present invention is given for the whole process of data reading, generation of watermark information, watermark embedding, watermark detection and detection result output, and the present invention is further described in detail .
[0036] Such as figure 2 , image 3 , Figure 4 , Image 6 , Figure 7 , Figure 8 , Figure 9 with Figure 10 As shown, in this embodiment, a school model geographic data generated by 3D MAX is selected as the experimental data, and the entire 3D geographic model data file includes 3D data (.3DS) and 2D texture mapping data (.JPG).
[0038] Step 1: Input watermark information: in this embodiment, it is: "Jiyin of Nanjing Normal University".
[0039] Step 2: Generate a random number seed point, which is "-1159586775" in this embodiment.
[0040] Step 3: Use the generated ran...
Embodiment 2
[0094] Such as figure 1 with Figure 5 As shown, the purpose of the present invention is to propose a digital watermarking method for 3D geographic model data, so that the entire 3D geographic model The attack has better robustness.
[0095] In order to realize the above-mentioned purpose of the invention, the technical scheme that the present invention takes is:
[0096] A three-dimensional geographic model digital watermarking method for copyright protection services, comprising the following steps:
[0098] Use a pseudo-random number generator to generate a random number as the watermark seed point , and then take the seed point as the key, using linear random Sequence generator, generate watermark information sequence And create watermark information and the watermark seed point One-to-one reference table.
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 three-dimensional geographic model digital watermark embedding and detection method, and belongs to the technical field of geographic information copyright protection. The method is based on that a texture coordinate value of three-dimensional geographic model data after an attack is changed without a variation in a data value of corresponding texture mapping. Thus, the method, on the basis of analysis of a previous watermarkalgorithm and by making full use of characteristics of texture mapping, re-establishes an embedding position of a watermark and builds a new digital watermarking model of the three-dimensional geographic model data. Not only is a three-dimensional grid data file of a three-dimensional geographic model embedded, but also a data file of the texture mapping is embedded with the watermark information. The problems are solved that a single geographic model algorithm is low in robustness for some attacks and that a current three-dimensional geographic model data file with texture mapping data cannot detect a watermark after a file attack and a model attack.
Description
technical field [0001] The invention relates to the technical field of geographic information copyright protection, in particular to a digital watermark embedding and detection method for three-dimensional geographic model data. Background technique [0002] In the field of GIS, 3D geographic model has become an important part of GIS data representation and has brought considerable economic benefits. The three-dimensional geographic model has the advantages of intuition, image, precision, and completeness. In terms of surface object expression, it makes the spatial three-dimensional structure display of objects more intuitive; as an important part of digital city construction, the three-dimensional geographic model has been used in urban planning, wireless communication, Disaster management, cadastral management, tourism, transportation and environmental simulation have shown great potential. [0003] In recent years, with the rapid development of the digital and network er...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More