Robust Mesh Watermarking Using Wavelet Transform
基于小波变换的3维网格水印

Traditional watermarking methods in the transformed domain for images can't be applied on meshes directly because meshes are generally irregular sampled data sets.This paper proposes a robust mesh watermarking algorithm using wavelet transform for semi-regular meshes obtained by remeshing.The original mesh with multiresolution representation is decomposed into a base mesh and a set of wavelet coefficient vectors by applying the wavelet transform.Based on the statistical analysis of wavelet coefficients,the watermarks are embedded by perturbing the wavelet coefficient vectors in low resolution subband,and the embedding strengths for different components of the wavelet coefficient vectors are designed differently in order to decrease the geometric distortion.Experimental results show that this algorithm satisfies imperceptibility and is robust to various attacks.