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Reversible deformation method for tetrahedral mesh model based on information embedding and application

A technology of tetrahedral mesh and information embedding, which is applied in secure communication devices and key distribution, and can solve problems such as inability to obtain original models.

Active Publication Date: 2021-06-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One application scenario is to transmit the volume mesh model in the network, the volume mesh model can be deformed, and the general shape of the model can still be displayed after deformation, but the original original model cannot be obtained without authorization

Method used

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  • Reversible deformation method for tetrahedral mesh model based on information embedding and application
  • Reversible deformation method for tetrahedral mesh model based on information embedding and application
  • Reversible deformation method for tetrahedral mesh model based on information embedding and application

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Embodiment 1

[0058] like figure 1 As shown, this embodiment provides a method for reversible deformation of a tetrahedral mesh model based on information embedding. The deformation process of the tetrahedral mesh model includes two steps: first, according to the traversal key K 1 Generate a traversal sequence with the original volume grid model, and then embed the key K according to the traversal sequence and data 2 Data embedding is performed on the volume grid model, and the volume grid model will also be deformed accordingly; the inverse deformation process of the tetrahedron grid model includes two steps: first, according to the deformed volume grid model and the traversal key generation Traverse the sequence, and then extract the embedded data according to the traversal sequence and the data embedding key, and restore the original volume mesh model losslessly after the data extraction is successful.

[0059] S1: Tetrahedral mesh model deformation and data embedding process:

[0060]...

Embodiment 2

[0094] A tetrahedral grid model reversible deformation system based on information embedding, comprising: a tetrahedral grid model data embedding module and a data information extraction module;

[0095] In this embodiment, the tetrahedral grid model data embedding module is used for tetrahedral grid model deformation and data embedding;

[0096] In this embodiment, the data information extraction module is used for inverse deformation of the tetrahedral mesh model and extraction of embedded additional data information;

[0097] In this embodiment, the tetrahedral grid model data embedding module is provided with: a first traversal sequence acquisition module, a first predicted value calculation module and a data embedding module;

[0098] In this embodiment, the data information extraction module is provided with a second traversal sequence acquisition module, a second predicted value calculation module and a data extraction module;

[0099] In this embodiment, the first tra...

Embodiment 3

[0106] This embodiment provides a storage medium, the storage medium can be a storage medium such as ROM, RAM, magnetic disk, optical disk, etc., and the storage medium stores one or more programs. Reversible deformation methods for tetrahedral mesh models with information embedding.

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Abstract

The invention discloses a reversible deformation method and application of a tetrahedral mesh model based on information embedding and extraction. The model deformation and data embedding process of the method comprises the following steps: generating a traversal sequence by using a traversal key; calculating a predicted value of each coordinate of the vertex; performing deformation and data embedding on the model by using a prediction difference expansion algorithm and a data embedding key, wherein the extraction process of the inverse deformation and embedded data comprises the following steps of: generating a traversal sequence by using a traversal key; calculating a predicted value of each coordinate of the vertex; and carrying out inverse deformation and embedded data extraction on the model by using a prediction difference expansion algorithm and a data embedded key. When a correct secret key is owned, the original model can be completely recovered, and the embedded data can be correctly extracted. According to the method, extra data can be embedded while the appearance of the tetrahedral mesh model is deformed, and the original mesh model is recovered losslessly and the embedded extra data is extracted losslessly.

Description

technical field [0001] The invention relates to the technical field of volume grid model information hiding, in particular to a reversible deformation method and application of a tetrahedron grid model based on information embedding. Background technique [0002] The rapid development of the Internet and social media has brought about a huge demand for data sharing and intellectual property protection. How to protect data intellectual property rights in the network environment has become an important issue. In response to this problem, the present invention proposes a reversible deformation scheme for tetrahedral mesh models. This scheme embeds additional data while deforming the volume mesh model, representing information such as personal information and copyrights. The deformed The volume mesh model is roughly similar to the original model in appearance, and the original model can be restored without loss after inverse deformation, and the embedded data can be extracted co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/16H04L9/08H04L9/06
CPCG06F21/16H04L9/0869H04L9/0662G06F21/1066G06F21/107
Inventor 吴昊天庄振威
Owner SOUTH CHINA UNIV OF TECH
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