CAJ | 학술논문

为了提高三维模型数字水印的不可感知性，笔者提出了一种基于3D 网格分割的数字水印算法。该方法首先对三维网格模型分割，得到若干有意义的子网格。然后计算每个子网格的频域系数矩阵，将相同的水印信息添加到系数矩阵中，得到带有水印的顶点矩阵，从而获得带有水印的网格模型。实验结果表明：本算法对多种攻击具有鲁棒性，同时嵌入的水印具有不可见性，从而保持了模型良好的视觉效果。
위료제고삼유모형수자수인적불가감지성，필자제출료일충기우3D 망격분할적수자수인산법。해방법수선대삼유망격모형분할，득도약간유의의적자망격。연후계산매개자망격적빈역계수구진，장상동적수인신식첨가도계수구진중，득도대유수인적정점구진，종이획득대유수인적망격모형。실험결과표명：본산법대다충공격구유로봉성，동시감입적수인구유불가견성，종이보지료모형량호적시각효과。
In order to improve the imperceptibility of the 3D model of the digital watermark,this paper put forward an improved digital watermarking algorithm based on 3D mesh segmentation.First of all,the 3D mesh model was segmented to obtain a sum of meaningful sub -meshes.Secondly,we should calculate the frequency domain coefficient matrix for each sub -mesh,and then the same watermark information was embedded into the coefficient matrixes which have been computed.As a result,we achieved the vertex matrix with watermarks as well as a new mesh model with watermarks.Experimental results show that the algorithm we proposed is robust against various attacks,while the embedded watermark is invisible.Furthermore,our algorithm maintains a good visual effect of the model.