基于三维网格物体的鲁棒性盲水印方案

Blind robust watermarking schemes based on 3D mesh object

提出了一种基于3D网格物体的鲁棒性盲水印方案。先将3D物体模型转换到仿射不变空间,然后把顶点坐标转换到球面坐标,利用球面坐标来嵌入水印。由于在仿射不变空间下,3D物体模型不受平移、旋转和比例变换的影响,故该水印方案对于此类变化具有很强的鲁棒性。试验结果也证明了这一点,且该水印具有良好的不可见性。

A new method for blind robust 3D mesh object watermarking applications was proposed. First, a transformation of the model to an affine invariant space was finished prior to watermark embedding. Then the Cartesian coordinates was converted to spherical coordinates in which the watermark was embedded. In affine invariant space, the 3D object is not affected by geometric transformations, such as translation, rotation and scaling. So the proposed method is robust enough to geometric transformations, which is proved by experimental results. The method is good at visual masking too.