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A Reversible 3D Polygon Mesh Data Hiding Method Based on Segment Shift

A technology of grid data and polygons, applied in the fields of information transmission, computer graphics, and confidential information communication, can solve the problems of weakened noise resistance, etc., and achieve the effect of high signal-to-noise ratio and strong application value

Inactive Publication Date: 2017-02-15
DALIAN UNIV OF TECH
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  • Description
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Problems solved by technology

At the same time, most of the existing algorithms have high requirements on the geometric shape of the carrier graphics, which further weakens its noise resistance.

Method used

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  • A Reversible 3D Polygon Mesh Data Hiding Method Based on Segment Shift
  • A Reversible 3D Polygon Mesh Data Hiding Method Based on Segment Shift
  • A Reversible 3D Polygon Mesh Data Hiding Method Based on Segment Shift

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Embodiment Construction

[0032] The implementation of the present invention is divided into two processes of information hiding process and information extraction, wherein each process includes three main steps:

[0033] (1) Information hiding process

[0034] 1. Grid information processing

[0035] Given the triangular grid with the information to be hidden and its point normal vector, extract the NS information, and perform segmentation processing on the NS. For example, if h=13, k=3, the small segment is {0,1,2...8193}, Each large segment contains 8 small segments

[0036] large section 1—8 9—16 17—24 25—32 33—40 41—48 … 8185—8192 peak segment 4 13 18 30 35 44 … 8190 frequency 13 15 16 12 10 16 … 18

[0037] As shown in the above table, it can be known that the small segments 4, 13, 18, ..., 8190 are peak segments respectively, and the grid points in the range of these peak segments in the position table are all marked as 1, and the others are marked ...

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Abstract

The present invention provides a reversible 3D polygon grid data hiding algorithm based on segment shifting, which mainly includes two parts: information hiding and information extraction, and the core part is to obtain normal control coordinates and normal Label information, and then segment it, then perform information hiding and information extraction respectively, and finally obtain the processed 3D mesh model through model reconstruction. The hiding method of the present invention constructs a segmented hiding strategy on the model, so that the hiding error is controlled within a small and controllable range, enabling users to hide infinitely more information on a 3D grid model, and ensuring higher signal-to-noise It really solves the direct contradiction between the amount of information hiding and the signal-to-noise ratio. As a new 3D model information hiding method, it has strong application value in the fields of grid communication, digital home and information security.

Description

technical field [0001] The invention is applicable to a hiding method based on 3D polygon grid data, belongs to the fields of computer graphics and information transmission, and is especially suitable for the field of confidential information communication. Background technique [0002] With the development and rapid popularization of modern communication technology, especially with the wide application of the computer Internet, which was born from the combination of communication and computer, the sharing and dissemination of information has become increasingly frequent and in-depth. While it brings various conveniences to people, it also brings a series of information security problems, such as information theft. Copyright protection of multimedia information, information tampering, etc. However, the traditional means of information security - cryptography cannot really solve such problems. For this reason, people put forward information hiding technology, which has been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/30
CPCG06F21/602G06F21/1066
Inventor 王胜法王智慧胡江北催智语潘怡霖
Owner DALIAN UNIV OF TECH
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