基于多通道HVS和DWT-DCT相结合的彩色图像水印算法  

Color Image Watermarking Algorithm Based on Multi-channel HVS and DWT-DCT

作　　者：贝依林[1] 周京伟[1] 

机构地区：[1]泰山学院信息科学技术学院,山东泰安271021

出　　处：《泰山学院学报》2012年第3期60-65,共6页Journal of Taishan University

摘　　要：随着计算机和网络的飞速发展,流通信息的版权保护问题越来越受到人们的重视,数字水印作为一种有效的版权保护方法已经得到了广泛的应用.本文提出了一种基于小波中频和DCT相结合的彩色盲水印算法,首先将彩色图像由RGB彩色空间转换到YCbCr彩色空间,利用其良好的空间独立性,基于人眼视觉掩蔽效应选择嵌入位置,然后分别通过将原图像DWT中频系数作分块DCT变换,嵌入水印.实验结果表明,嵌入算法容易实现,且该水印算法具有很好的不可见性,并对剪切和JPEG压缩等图像操作都有很好的鲁棒性.A blind watermarking algorithm for digital image based on DCT and DWT is proposed. First, the original image is transformed from the RGB color space into the YCbCr color space, which has the excel- lent independence of every channel, then the watermark is embedded into all three color spaces. Secondly, the watermark embedding position was chosen by human visual system （ HVS）, and the embedding of water- marking is achieved by the algorithm of image watermark technique on DCT and DWT, and the capacity of embedding depends on human visual system. The experimental result indicates that the algorithm is visually imperceptible and robust to general image processing.

关 键 词：数字水印 多通道 小波变换 鲁棒性 DCT 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]