摘要
提出了一种数字图像水印算法基于特殊选择的傅里叶采样卷绕的快速离散曲波变换.利用Arnold变换对水印信号进行置乱加密,将置乱后的信号进行多次重复来增加冗余度.按照曲波系数分布的特点,选择合适的尺度和系数对水印信号进行嵌入.实验结果表明,该算法对JPEG、加噪、滤波等图像处理具有好的鲁棒性,同时具有好的不可见性.
This paper proposed a digital image watermarking scheme based on Curvelet transform.Wrapping of specially selected Fourier samples is employed to implement Fast Discrete Curvelet Transform to transform the digital image to curvelet domain.First,use Arnold transform to encrypt the watermark.Then,repeat the cryptographic code many times to form a new code to creat the redundant data.Fianally,the proper position to embed the mark are chosen accoding to the characteristic of curvelet coefficients.The experiment results show that the scheme is robust to common image processing including JPEG compression,adding nosie,cut,Gaussion lowpass filter,Brighter Filter,Darker Filter,Increase/Decrease Contrast.Also the scheme has good invisibility.
出处
《微电子学与计算机》
CSCD
北大核心
2011年第12期103-106,共4页
Microelectronics & Computer
关键词
数字图像水印
曲波变换
鲁棒性
不可见性
digital image watermarking
curvelet transform
robust
invisibility
