Research on the Application of Digital Watermarking Algorithm Based on 3D Triangular Mesh Model

Digital watermarking uses the redundant information of protected data to embed some practical information or serial numbers into carrier data through a series of algorithms. These secret information are not perceived and noticed by human visual system, and can only be extracted through certain algorithms. This article introduces an enhanced three-dimensional triangular mesh model. It embeds original watermark information into the coefficients of the discrete Fourier transform domain of the carrier image. By leveraging addition invariance, the watermark information is incorporated into the vertex data of the 3D model. This method significantly enhances watermark robustness. Simulation results demonstrate the algorithm's effectiveness against geometric attacks like rotation, scaling, and translation. Moreover, it exhibits strong resilience against color and combination attacks. The algorithm features both robust and fragile watermarks, which operate independently. The robust watermark withstands common attacks such as noise and simplification, while the fragile watermark detects tampering and provides positioning capabilities. This approach offers valuable support for employing digital watermarking in trademark protection for 3D triangular mesh models.