基于切片高度图的三维模型数字水印算法

A Watermarking Scheme for 3D Models Based on Slice-cutting and Height Maps

提出了一种基于切片高度图的三维模型数字水印算法.算法对三维模型进行切片,根据顶点在切面的投影得到切面高度图,并通过修改灰度图中灰度值进行水印嵌入,最后利用修改后的高度图调整三维模型的顶点值对模型进行重构.实验结果表明,该算法对于几何变换和剪切、噪声攻击等都具有较好的鲁棒性.

A watermarking scheme for 3D models based on slice-cutting and height maps is proposed.By using the algorithm,3D models are cut into a few pieces and vertices which belonged to these pieces are projected into some planes,and height maps are confirmed.Then,watermarks are embedded into height maps by modifying the values of pixels.At last,values of 3D model＇s vertices are reconstituted according to the height maps which has been modified.Simulation results show that this watermarking scheme is robust to common geometric attacks,removal attacks and noising attacks.