Novel robust mesh digital watermark method based on biorthogonal non-uniform B-spline wavelet

A digital watermarking and robust network technology, applied in image data processing, image data processing, instruments, etc.

Inactive Publication Date: 2013-04-17
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Digital watermark technology is to embed some identification information (that is, digital watermark) directly into the digital carrier, but it does not affect the use value of the original carrier, and it is not easy to be detected or noticed by the human perception system (such as the visual or auditory system).

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  • Novel robust mesh digital watermark method based on biorthogonal non-uniform B-spline wavelet
  • Novel robust mesh digital watermark method based on biorthogonal non-uniform B-spline wavelet
  • Novel robust mesh digital watermark method based on biorthogonal non-uniform B-spline wavelet

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Embodiment Construction

[0037] The following will be combined with the accompanying drawings figure 1 , describe the specific structure and implementation of the present invention in detail. Under the MATLAB7.0 simulation experiment platform, a Venus model consisting of 10,002 vertices and 20,000 triangles is selected for testing to verify the effectiveness of the algorithm. The length of the initial watermark sequence is N=40, and the parameter S=30 is set, so that the bit capacity used for testing is 40*30=1200. We illustrate its invisible lines and robustness with the peak signal-to-noise ratio (PSNR) between the initial model and the watermark grid model and the bit error rate (BER) of the test model, respectively.

[0038] A detailed description of an embodiment of the present invention is given below.

[0039] 1. wavelet analysis

[0040]Wavelet analysis is one of the very useful multi-resolution representation techniques, which is widely used in various applications such as image compres...

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Abstract

The invention provides a novel robust mesh digital watermark method based on a biorthogonal non-uniform B-spline wavelet (BNBW), wherein a watermark is embedded through a watermark modulating wavelet coefficient vector on a frequency domain and the watermark is extracted through the relevance among coefficients. The watermark can be embedded into an irregular mesh through the novel robust mesh digital watermark method so that the three-dimensional wavelet analysis becomes possible. The method can resist the common attack of a three-dimensional model, such as simplified polygon meshes, the addition of random noise, rotation, scaling and the combination of various attacks and can detect and position a distorted vertex.

Description

technical field [0001] The invention relates to a novel robust three-dimensional grid model digital watermarking method based on BNBW. Background technique [0002] With the development of the information society, the Internet provides a large amount of digital media information data in various forms such as images, videos and audios. The Internet provides convenient services for people. People can easily obtain, copy, process and distribute digital media through many existing tools and the Internet. As a result, these devices are exploited by copyright infringers who illegally use them for personal gain, violating the legitimate rights and interests of digital content providers. Digital watermark technology is to embed some identification information (that is, digital watermark) directly into the digital carrier, but it does not affect the use value of the original carrier, and it is not easy to be detected or noticed by the human perception system (such as the visual or a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 陈丽萍孔祥增陈尤莺宋考杨文生
Owner FUJIAN NORMAL UNIV
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