A digital watermarking algorithm which combines normal vector distribution of each patch with Laplace matrix is proposed for the copyright protection of 3D mesh model.The key idea is to decompose 3D mesh model firstly

and select the embedded domain

and then construct a Laplace matrix after preprocessing the watermark image.Finally we embed the processed watermark image by modifying the spectral coefficient of the Laplace matrix.Experimental results show that the proposed algorithm has better rob...