局部集的3D模型水印方法

提出了一种新的3D模型水印方法，利用模型顶点局部集信息来实现水印信息的嵌入和盲检测。水印嵌入阶段利用模型顶点局部集信息选取恰当的水印嵌入点以降低嵌入水印对模型视觉质量的损害。水印检测阶段，相同的局部集面积信息被提取，从而在水印嵌入和检测间建立了准确的同步关系，提高了水印抗攻击能力。利用一阶矩仿射不变性所提取的局部集信息能够抵御旋转、平移、均匀缩放等几何攻击。实验结果表明，在攻击强度不足以损害模型视觉质量的前提下，该方法对加噪、平滑滤波等攻击也具有较高鲁棒性。

Watermarking 3D Objects Using Local Set Information

We propose a new watermarking method in the time domain, which utilizes a local set of information of each vertex to embed watermarking information and blind-detect. During the embedding process, appropriate vertices are selected to be embedded with the watermarking information according to local set area of each vertex on purpose of improving imperceptivity. As the detection progresses, the same local set area information is obtained to build the synchronization between embedding and detecting. This improves the robustness of the proposed. The property of affine invariant of first order moment makes the algorithm resisting attacks of rotation, translation, uniform scaling easily. The experiment has shown that, while the attacks are not so strong to damage the visual quality of 3D object, the algorithm acquires high robustness to resist attacks of adding noise and smooth-filtering.