3D model watermarking method based on Beamlet line feature positioning

Abstract

The invention discloses a three-dimensional blind watermarking method for constructing watermark synchronous information by using one-ring neighborhood area of a vertex and Beamlet line features. The method comprises the following steps: selecting M non-overlapped one-ring neighborhoods from small to large according to the one-ring neighborhood area of the vertex of a three-dimensional model; performing independent tangent projection on the M one-ring neighborhoods, extracting features of M Beamlet lines, and determining embedded positions of M watermark positions; modifying vertex coordinates corresponding to the Beamlet line features, so that two grid edges connected with the vertex coordinates have equal length for embedding watermark information bits; and performing watermark detection without the original three-dimensional model. The method is an airspace blind watermarking method, and obviously improves the robustness against affine transformation attack while ensuring the transparency of the watermark; and the algorithm also has strong robustness against grid simplification, smoothing and attack of noise and the like.

Description

technical field [0001] The invention belongs to the technical field of digital watermarking methods, and relates to a 3D model watermarking method based on Beamlet line feature positioning. Background technique [0002] 3D models are widely used in the entertainment industry, manufacturing industry, etc. Therefore, it is very important to protect the copyright of 3D models. As an effective means of 3D model copyright protection and content authentication, digital watermarking has been extensively studied in recent years. Due to the orderliness of point, line, and surface data in the 3D model, and the model is vulnerable to attacks such as translation, scaling, rotation, and mesh simplification, it is impossible to use Fourier transform, cosine transform, Mathematical tools such as wavelet transform are used for analysis. This limits the research and development of 3D model watermarking technology, which makes the robustness of 3D model watermarking method weak and the abil...

AI Technical Summary

Problems solved by technology

Due to the orderliness of point, line, and surface data in the 3D model, and the model is vulnerable to attacks such as translation, scaling, rotation, and mesh simplification, it is impossible to use Fourier transform, cosine transform, Mathematical tools such as wavelet transform for analysis

This limits the research and development of 3D model watermarking technology, which makes the robustness of 3D model watermarking method weak and the ability to resist affine transformation attack is poor.

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