Method for adding digital watermark to three-dimensional model layout and detecting digital watermark

A three-dimensional model and digital watermarking technology, applied in computing, image data processing, image data processing and other directions, can solve the problems of less research on copyright protection of three-dimensional model design drafts, and achieve the effect of avoiding vertex inconsistency and improving robustness.

Inactive Publication Date: 2017-06-09
北京慧点科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, digital watermarking technology is mostly aimed at images, audio and video, but there are few studies on the copyright protection of 3D model design drafts

Method used

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  • Method for adding digital watermark to three-dimensional model layout and detecting digital watermark

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Embodiment 1

[0033] Embodiment 1. This embodiment provides a method for adding a digital watermark to a three-dimensional model design draft, which is characterized in that it includes the following steps;

[0034] Step 1: Obtain the 3D model design draft and read the design data of the 3D model design draft;

[0035] Step two, digital watermark generation, this step includes the following specific steps:

[0036] S2.1, obtain design data; convert the design data and its corresponding timestamp information into watermark information;

[0037] The watermark information includes the header, description of the 3D model design draft, designer information, authorized user information, authorization time information, authorization method, authorization end time, usage times during authorization, reserved bits, and data check bits.

[0038] Information ID Information capacity (unit: bit) Message header2 3D model design draft description16 Designer information8 Authorized user information8 Authori...

Embodiment 2

[0052] Embodiment 2. This embodiment proposes a digital watermark detection method for a 3D model design draft on the basis of Embodiment 1. The 3D model design draft is added according to a method for adding a digital watermark to a 3D model design draft according to Embodiment 1. Digital watermark, the digital watermark detection method includes the following steps:

[0053] Step1, the 3D model design draft needs to be preprocessed before the watermark extraction, that is, the grid relocation is performed. The design draft of the 3D model may have undergone some intentional or unintentional attacks, such as the rotation, translation, zooming of the coordinates of the model design draft, the cutting and smoothing of the model, etc. During the watermark extraction process, repositioning is required to find the original model. The vertex position corresponding to the vertex.

[0054] Reposition the three-dimensional model design draft according to the formula D(P, Q)=d()=min()∈Q.

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Abstract

The invention discloses a method for adding a digital watermark to a three-dimensional model layout and detecting the digital watermark, and the method is characterized in that the method comprises the following steps: firstly obtaining the three-dimensional model layout, and reading the design data of the three-dimensional model layout; secondly converting the design data and timestamp information into binary watermark information, employing a pseudorandom sequence for modulation, and obtaining the digital watermark; enabling the generated digital watermark to be embedded into the redundancy information of the three-dimensional model layout, calculating an insertion node at each binary bit, and carrying out the insertion. The method can effectively solve a copyright protection problem of the three-dimensional model layout.

Description

Technical field [0001] The invention belongs to the field of copyright protection and the technical field of digital watermark security, and particularly relates to a method for adding a digital watermark to a design draft of a three-dimensional model and detecting a digital watermark. Background technique [0002] With the rapid development of digital technology, the acquisition and dissemination of information has been greatly facilitated, and it has also brought about the copyright protection of digital products. Digital watermarking technology provides an effective method for copyright protection of digital products. At present, digital watermarking technology is mostly aimed at images, audio and video, and there are few studies on copyright protection of 3D model design drafts. [0003] With the rapid popularization of 3D printing technology, the application of 3D models has become more and more extensive, and there are more and more 3D model design drafts. The 3D model desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 姜晓丹吕翊戴宇升林明黄海峰荆磊胡刚
Owner 北京慧点科技有限公司
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