基于掺铒光纤激光器混沌系统的彩色图像水印方法  

Color Image Watermarking Based on Erbium-Doped Fiber Laser Chaotic System

作　　者：郑骁鹏[1] 田小建[1] 单江东[1] 

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（理学版）》2010年第2期307-312,共6页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:60372061)

摘　　要：提出一种基于光延迟反馈掺铒光纤激光器(ODF-EDFL)混沌系统的彩色图像小波数字水印方法.在单环掺铒光纤激光器中加入光延迟反馈回路后,随着系数的变化,在一个较大范围内将出现混沌现象.通过优化后的ODF-EDFL系统混沌序列加密水印图像,将调制好的水印嵌入宿主图像的绿色分量中,即经小波变换后的低频高端部分.实验结果表明,该算法可较好地嵌入和提取彩色图像的水印,并对图像压缩、加噪和滤波等攻击具有较好的鲁棒性.A novel wavelet watermark algorithm based on erbium-doped fiber laser with an optical delay feedback （ODF-EDFL） system to encrypt watermark image for color image was proposed. The erbium-doped fiber laser （EDFL） was chaos with coefficients varying in a very wide range when the optical time-delayed system was added on it. The chaotic sequences generated by an ODF-EDFL system were improved to encrypt the binary watermark image. Then the modulated watermark was embedded in the high region of the low frequency band of the green component which had been DWT of the original image. Experimental results show that the proposed method can realize the watermark embedding and extracting on color image and is robust against the attacks of general image processing methods such-as JPEG compression, noise, and filtering.

关 键 词：数字水印 ODF—EDFL混沌系统 彩色图像 绿色分量 离散小波变换(DWT) 

分 类 号：TN248.1[电子电信—物理电子学]