基于二维工程图的数字水印比例算法

Scale Digital Watermarking Algorithm Based on Two-dimensional Engineering Graphics

针对二维工程图的特点,提出了一种数字水印方案.该方案通过修改二维工程图中各实体顶点间的距离比例来嵌入水印信息.由于该比例是一种全局特征,在视觉效果不变的情况下该比例不会发生改变,因而该水印方案对旋转、平移和均匀缩放这类攻击具有很强的健壮性.实验结果表明该方法对上述攻击具有良好的抵抗性能.

A digital watermarking scheme is presented according to the characteristics of two-dimensional engineering graphics.Watermarking information is embedded by modifying the scale of the distance between vertexes in two-dimensional engineering graphics.If the visual effect is the same,this scale will not be changed because it is a whole characteristic.This scheme is very robust against the attack such as rotation,translation,scale and so on,which is illustrated by the result of the experiment.