一种针对AutoCAD二维图形的数字水印算法

A digital watermarking algorithm for CAD two-dimensional graphics

数字水印已经广泛应用于栅格图像,但是针对AutoCAD二维图形的数字水印方案却不多,本文提出了一种针对AutoCAD二维图形的数字水印算法,其思想是利用CAD图形的仿射不变性和最低有效位算法(Least Significant Bits,LSB),将数字水印信息嵌入至线段的比值中。实验证明该算法对平移、旋转、缩放等攻击都能起到很好的抵抗,具有较高的安全性,是一种盲水印方案。

Digital watermarking has been widely used in raster image, but little work has been done to develop watermarking algorithms for 2D CAD vector images. This paper present a digital watermarking algorithm for 2D AutoCAD graphics, the idea is to use CAD graphics Affine deformation and Least Significant Bits algorithm, embedded digital watermark information in the ratio of segments. Experimental results illustrate that the algorithm is high security which can anti-translation, rotation, scaling, and other attacks, it＇s a blind watermark program.