分数阶S变换下的工程图数字水印算法  

A Watermarking Algorithm for Engineering Graphics on Fractional S Transform

作　　者：欧阳苗[1] 吴春红[1] 袁玉敏[1] 

机构地区：[1]厦门理工学院应用数学学院,福建厦门361000

出　　处：《厦门理工学院学报》2013年第3期54-58,共5页Journal of Xiamen University of Technology

基　　金：福建省教育厅科技计划项目(JB11181)

摘　　要：在分析分数阶S变换原理的基础上,提出一种新的二维工程图数字水印算法.为提高算法的抗剪切攻击能力,将载体工程图按有限覆盖原理分区,在每一块分区中分数阶S变换频谱嵌入水印信号.实验表明该算法具有良好的鲁棒性和安全性,对抗剪切攻击尤显优势.A new digital watermarking algorithm for 2-dimensional engineering graphics is proposed based on the principle of fractional S transform. In order to improve the cropping resistant competence of the algorithm, Vectors are overlapped by groups according to finite covering positions, and the watermark is embedded respectively on diverse positions＇ fractional S transform spectrum of vertex set. Experimental results show that the algorithm is robust and safe, effective especially against cropping.

关 键 词：分数阶S变换 数字水印 工程图 有限覆盖 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]