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Reversible 3D polygonal grid data hiding algorithm based on segment displacement

A technology of grid data and polygons, applied in 3D modeling, image data processing, electrical digital data processing, etc., can solve the problem of weakened noise resistance and achieve high signal-to-noise ratio and strong application value

Inactive Publication Date: 2015-01-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Reversible 3D polygonal grid data hiding algorithm based on segment displacement
  • Reversible 3D polygonal grid data hiding algorithm based on segment displacement
  • Reversible 3D polygonal grid data hiding algorithm based on segment displacement

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Experimental program
Comparison scheme
Effect test

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 ...

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PUM

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Abstract

The invention provides a reversible 3D polygonal grid data hiding algorithm based on segment displacement. The algorithm mainly includes an information hiding part and an information extracting part, wherein the core part is information processing conducted through a 3D grid, normal control coordinates and normal label information are acquired and segmented, information hiding and information extraction are conducted, and finally a processed 3D grid model is acquired through model reconstitution. According to the hiding algorithm, a segmenting hiding strategy is adopted in the model, so that a hiding error is controlled within a small and controllable range, a user is capable of hiding infinite information on the 3D grid model, the high signal to noise ratio is guaranteed, and the problem that the information hiding amount and the signal to noise ratio are contradictory directly is really solved. As a new 3D model information hiding mode, the reversible 3D polygonal grid data hiding algorithm has high application value in the fields such as grid communication, digital families 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 Applications(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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