Abstract: In this paper,a new 3D watermarking algorithm,which resolves problem of serious local distortion or heavy alteration of the model caused by embedding watermarking into the 3D models,was proposed based on Genetic algorithms in wavelet domain．Firstly,the feature points of the 3D model are extracted．Then,the best embedded coefficients are found via GA in which the fitness function is defined as the minimal change of the significant region after the 3D watermarking embedding．Finally,the final watermarked 3D content is obtained through the inverse discrete wavelet transform of the modified coefficients．The numerous experimental results show that the proposed 3D watermarking algorithm is robust against various attacks and makes the 3D polygonal models to have less distortion.

Key words: Digital watermarking,Genetic algorithm,Discrete wavelet transform (DWT),3D mesh model