基于CAD产品版权保护的细分曲面水印算法

Subdivision Surface Watermarking Algorithm Based on Mesh

研究了三维几何CAD产品的特点,以增强鲁棒性为目的,对基于网格的细分曲面水印算法提出了改进。细分模式作为从给定规则产生离散曲面的方法统一了传统的参数曲面与多边形2种实体表面的表示。解决了计算机图形学等领域对任意拓扑结构的光滑曲面造型的需求,弥补了NURBS曲面在表示复杂拓扑物体方面存在的困难,可以处理任意拓扑的控制网格,保证曲面整体的光滑性,将细分曲面用于三维几何CAD产品版权保护。

The features of 3D geometrical CAD products has been discussed,in order to enforce the robustness of the watermarking surface algorithm,some improvements would be presented.Subdivision mode as a method of discrete surface from the existent rules unified the representation between traditional parametric surface and polygon solid surface.With the increasing demand of smoothing surface modeling of arbitrary topology surface in computer graphics and other fields,subdivision mode could produce the complex topolo...