一个适用于大型三角网格的鲁棒水印算法

针对大型三角网格的特点,提出一个基于外存的鲁棒水印算法。首先对大规模三角网格顶点的重新排序和分组,然后对由分组中顶点到原点的距离组成的序列进行DCT变换,最后将由二值图像调制的水印序列嵌入到经过量化的DCT高频系数中。实验表明,该算法能够抵抗网格噪声、简化、剪切以及仿射变换等攻击,具有良好的不可见性和鲁棒性。

A Robust Watermarking Scheme for Large Triangle Meshes

A robust watermarking algorithm was proposed based on out-of-core, according to the characters of large triangle meshes. Firstly, the large triangle mesh was reordered and segmented to groupings. Then, a DCT transform was implemented on the sequence of distance from origin to vertexes of the grouping. In the end, the watermark information that was concocted from two value images was embedded to the high frequency DCT coefficients that have been quantified. The experiment results demonstrate the robust by .Experimental results show that this watermarking scheme is imperceptible and robust against attacks such as addition of noise, mesh simplification, model cropping, and other affine transforming.