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.
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)
关键词
分数阶S变换
数字水印
工程图
有限覆盖
fractional S transform
digital watermarking
engineering graphics
finite covering
