基于DCT的彩色图像水印算法  

A DCT-based Watermarking Algorithm for Color Images

作　　者：鲍昀霞[1] 何东健[2] 

机构地区：[1]西北农林科技大学机械与电子工程学院,陕西西安712100 [2]西北农林科技大学信息工程学院,陕西西安712100

出　　处：《微电子学与计算机》2007年第1期91-93,共3页Microelectronics & Computer

摘　　要：提出了一种基于DCT的彩色图像水印算法,通过修改彩色图像绿色分量的DCT系数实现水印的嵌入。原始二值水印图像经Arnold置乱加密后,嵌入到绿色分量的DCT中频系数中,并能够根据原始图像提取出来。实验证明,该算法能有效抵抗JPEG压缩、裁剪、加噪、图像增强等攻击,具有良好的不可感知性和很强的鲁棒性。In this paper, a DCT-based watermarking algorithm for color images was proposed. The watermark was embedded into original color image by identifying which DCT coefficient of green components. The original binary watermark image was firstly encrypted through scrambling technique, and then embedded into DCT mid-band frequency coefficient of green components. And the watermark can also be detected with the original image from watermarked image when needed. The experiment results demonstrate that the algorithm is imperceptible and very robust to attacks such as JPEG compression, cropping, additive noise and enhancement.

关 键 词：彩色图像 数字水印 DCT变换 图像置乱 版权保护 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]